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Kindle Money Mastery

If you have ever wanted to be able to be an author for a living or as a side hobby, this is the online course for you! This course gives you access to all kinds of ebook and materials on how to make the most of the Amazon Kindle Store to make a huge amount of money! You don't need to be a creative genius, spend Hours on end writing, or even know how to use Kindle! All that you have to do is follow the instructions in this course by Stefan Pylarinos. Stefan built this course based on what he does for a living Every Single DAY. This is REAL information that has been perfected in a real business Why would this NOT work for you? This is how Stefan makes his money Why not you? Just think You can make living money writing Kindle books. And you can learn all about how to get started making money with K Money Mastery! Read more here...

Kindle Money Mastery Summary

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Highly Recommended

I usually find books written on this category hard to understand and full of jargon. But the writer was capable of presenting advanced techniques in an extremely easy to understand language.

My opinion on this e-book is, if you do not have this e-book in your collection, your collection is incomplete. I have no regrets for purchasing this.

The Role of Meta Analyses and Literature Reviews

To begin evaluating a review, the practitioner should ask two questions does it ask a carefully focused clinical question, and is the method for including studies reasonable and appropriate The latter question can be expanded as follows are methodological standards articulated (for example, those laid out in this chapter), and do the studies chosen address the research question articulated by the reviewer Stating inclusion criteria up front helps avoid any biases toward preconceived conclusions a reviewer might hold. Aspects of oncology studies to keep in mind when reviewing a review are outcomes (as described previously) and latency periods. Review writers should demonstrate that they exhaustively searched appropriate bibliographic databases (such as Medline), but also that they contacted experts in the area who might be aware not only of published studies not yet appearing in Medline, but of unpublished studies this is important because studies with negative findings are less likely...

San Ling SiHoe and David Murphy 1 Introduction

It is unknown how DNA integrates into the host chromosome, but some information can be inferred from a study made on the state and organization of the inserts found in transgenic mice (2). Approximately 70 of the mice carry exogenous DNA in all their somatic and germ cells, implying that integration took place prior to the first round of DNA replication. The remaining 30 of the mice showed some degree of mosaicism, indicating that the DNA must have integrated after this first round of replication. Integration events have been observed on many different autosomes (3), on the X-chromosome (4), and on the Y-chromosome (Murphy, unpublished observations). Transgene copy number varies (one to several hundred), but within a transgenic animal, there is usually only one integration site where if in multiple copies, the transgene is arranged in a head-to-tail tandem array.

Notes For The 2005 Downloadable Version

I am quite pleased to make this book available in download form on the honor system. The fact that the book was well reviewed and well received was a heartwarming, wonderful compensation for my family and myself. But as a self-published specialty book, revenues have not come close to paying for the time and expense of writing and publishing it. So, while I would like to offer this book for free, I cannot afford to do so. Yet, I want to make the book available to anyone who believes they might benefit from it. For these reasons, I am making the book available in electronic form on the honor system. I trust that readers who use the book will fulfill their responsibility to mail in due compensation. Our

Cytoarchitecture Of Local Circuits In The Superior Colliculus

The morphological characteristics of neurons in the intermediate layer are more heterogeneous. From the somatodendritic morphology, they are classified into multipolar-, pyramidal-, fusiform-, horizontal-, round-shaped, and wide-field vertical cells (Norita 1980 Ma et al. 1990). Their classification, however, appears to be less distinct than those in the superficial layer. The electrophysio-logical properties of SC neurons are also very heterogeneous. Based on the firing pattern to the depolarizing current step, they are classified into regular-spiking, late-spiking, burst-spiking, fast-spiking, and rapid adaptation types (Saito and Isa 1999). Among these, the regular-spiking type constitutes the majority of the neurons both in the superficial (50 Endo and Isa, unpublished) and

Creation And Maintenance Of Cell Lines Stably And Heterologously Expressing nAChR Of Defined Subunit Composition

Cognizance of the unpublished difficulties of nAChR expression in common host cell lines such as CHO and COS cells resulted in initial reasoning that transfection and heterologous expression of nAChR should be perfected first using cells that naturally make at least some nAChR subtype. Hence, it was decided to overexpress rat a7 subunits in the SH-SY5Y cell line known to naturally express human a7- and a3p4*-nAChR.1833 Bolstered by success with that approach and in expression of wild-type or mutant, human or chick a7 subunits in the same host cell line,19 attention was then turned to the SH-EP1 human epithelial cell line. This cell line was initially isolated from the same tumor that yielded the SH-SY5Y clone, but early control studies indicated that it was native nAChR-null,33 consistent with observations that the SH-EP1 and SH-SY5Y cell lines evolved divergent morphologies and chemical phenotypes as they were cloned.34 Nevertheless, neuronal and epithelial cells have a shared...

Axoglial Contact at the Nodes

As the ezrin-binding protein EBP50 and Rho-A GTPase, are localized at the microvilli (Gatto et al., 2003 Melendez-Vasquez et al., 2001 Scherer et al., 2001). These proteins may potentially link the actin-rich microvilli with integral membrane proteins such as syndecans (Goutebroze et al., 2003). In addition, several extracellular matrix proteins are present in the nodal gap under the basal lamina, including the hyaluronan-binding proteoglycan versican (Apostolski et al., 1994), tenascin C (Martini et al., 1990 Rieger et al., 1986), and the NG2 proteoglycan (Martin et al., 2001). Dystroglycan, which is abundantly expressed at the abaxonal surface of myelinating Schwann cells (Saito et al., 1999), is also located at the nodes (Saito et al., 2003). Schwann cell-specific ablation of dystroglycan results in disorganization of the microvilli, marked reduction in nodal Na+ channels and consequently impaired nerve conduction (Saito et al., 2003). It was recently suggested that in the PNS, the...

Molecular Composition

The axonal membrane at the axoglial junction contains a complex of two cell-recognition molecules Caspr (con-tactin-associated protein also known as paranodin) (Einheber et al., 1997 Menegoz et al., 1997) and contactin (Rios et al., 2000) (Fig. 2B). Caspr is a Type I transmembrane protein that belongs to a distinct subgroup of the neurexins, a polymorphic protein family involved in cell adhesion and intercellular communication (Bellen et al., 1998 Missler and Sudhof, 1998). There are five human genes in the Caspr family (Caspr-Caspr5 Peles et al., 1997 Poliak et al., 1999 Spiegel et al., 2002 ), two in Drosophila (nrxIV and axo Baumgartner et al., 1996 Yuan and Ganetzky, 1999 ), and two in C. elegans (itx and nlr Haklai-Topper and Peles, unpublished observations). These proteins bind several cell adhesion molecules and thus considered as CAM-associated-proteins (acronym CASPR). Their extracellular region consists of several domains implicated in mediating protein-protein interactions,...

Arabidopsis thaliana and EcO157 and Se

Many genetic tools are available for studying A. thaliana (thale cress) 174 . Thus, it provides an opportunity to gain insight into the response of a plant to human pathogens. Single strains of EcO157 and Se Newport were assessed in an A. thaliana model for attachment and growth characteristics 175 . In initial experiments, the human pathogens, applied to sterile roots under ideal humidity, remained attached at high concentrations (109 CFU g tissue) with eventual migration to the stems shoots (2 x 107 CFU g). Examination of the roots by confocal microscopy revealed that EcO157-GFP and Se Newport-GFP strains appeared to have invaded the plant interior specifically at locations where lateral roots emerge (Figure 2.3C, Figure 2.1H). A similar result was obtained recently with a Se typhimurium strain in an alfalfa seedling model using relatively low numbers of cells ( 102 CFU) 120 . Single cells and cell aggregates of EcO157 and Se Newport were observed also on shoots and flowers 175...

Cell Death Expression Cell Transformation and

Maybe the most compelling data to show that Hsp70 (and perhaps other Hsp) may have no general inhibitory function in the pathway of apoptosis execution comes from studies on the interaction between hyperthermia and radiation, longbefore specific studies on apoptosis became popular. These data showed that the temporal and physiological upregulation of the cohort of all heat-inducible proteins sufficient to provide cells with a thermotolerant state does not alter the cellular radiosensitivity (Dikomey and Jung 1992 Hartson-Eaton et al. 1984 Haveman et al. 1987 Jorritsma et al. 1986 Kampinga et al. 1997 Mivechi and Li 1987 Raaphorst and Azzam 1983, and many more). Also, when Hsp70 or Hsp27 are transiently upregulated using inducible systems, no effect of radiosensitivity was found (unpublished data). Inversely, RNAi-mediated transient downregulation of Hsp70 was shown not to affect radiation-induced apoptosis (Ekedahl et al. 2003). Finally, although some stable cell lines overexpressing...

The HOG Signaling System

The activity and the relative contribution of the two pathway branches to Hog1 kinase activity are usually measured in mutants that are blocked in either branch (Maeda et al., 1995 O'Rourke and Herskowitz, 2004). Whether such experiments reflect activity of the two branches in wildtype cells is presently unknown. It appears that the Sho1 branch has a higher stress threshold for activation (Maeda et al., 1995 O'Rourke and Herskowitz, 2004) and that it is insufficient to mediate maximal pathway activation alone (unpublished data).

Brain Specific CREB Loss in Mice

CREBNesCre mice lacked CREB immunoreactivity in almost all neurons and glia, probing with either of three antibodies recognizing CREB epitopes from the N-termi-nal half to the C-terminal end, indicating that no CREB protein, including truncated forms, were present (Fig. 5B). Phenotypically, CREBNesCre mice are essentially normal except for a reduction in body size due to a deficiency in growth hormone (T. M., unpublished data).

Cell localization and secretioninternalisation of engrailed proteins

(Fig. 1E, F) (Simon et al., 2001 Alberi et al., 2004) could be explained by this altered FGF8 expression. A conserved region in the large intron of the FGF8 gene with an active En1 binding site exists in the genome of higher vertebrates (Gemel et al., 1999 and our own unpublished database search Simon et al., 2004) suggesting a direct regulation of FGF8 by the engrailed genes. Ectopic FGF8 expression in chicken embryonic midbrain infected with retroviruses expressing En1 supports this idea (Shamim et al., 1999).

Flavivirus translation

Viral genomes do not encode translational machinery therefore, viruses rely on the host cell for protein synthesis (Gale et al 2000). It has been shown that RNA replication of picorna- and flaviviruses is coupled to translation, in that each viral RNA must be translated in order to be replicated (Khromykh et al 1999, 2000, Novak & Kirkegaard 1994). In addition, RNA replication appears to be coupled to viral assembly (Khromykh et al 2001b, Nugent et al 1999). Thus, the same genome must be translated in order to be replicated and must be replicated in order to be packaged into the virion. While the flavivirus 5' UTRs are more structured than many cellular capped 5' UTRs, they are shorter and less structured than the uncapped internal ribosome entry site (IRES)-containing 5' UTRs characteristic of the other members of the Flaviviridae family (i.e. hepaci- and pestiviruses). It is thought that flaviviral translation is cap-dependent because the flavivirus genomic RNA contains a m7G cap at...

Agricultural solutions

Agricultural science is working on developing a tool kit that will go a long way in this direction, and will make it increasingly rare for chemicals to be needed. Unpublished research of the former Department of Agronomy of Wageningen University, for example, showed that in a cropping system with a very high frequency of potato cultivation and an intended heavy pressure of a variety of potato pests and diseases, a diversity of non-chemical control measures could make the cropping system healthy again and restore the yield to the level of the treatment with full chemical control. Research is currently also working on risk assessments related to restricted use of chemicals in the conversion to more sustainable arable farming (e.g. de Buck 2001).

Aberrant T Cell DNA Methylation Gene Expression and Cellular Function in Idiopathic Lupus

Initial studies compared total genomic dmC content in T cells from patients with inactive and active lupus with controls using reverse-phase HPLC. These studies demonstrated that T cells from patients with active lupus have decreased genomic dmC levels as well as decreased levels of DNA methyltransferase activity. Intracellular pools of SAM and S-adenosylhomocysteine, both regulators of transmethylation reactions, were normal (Richardson et al., 1990). Subsequent studies demonstrated decreased Dnmt1 mRNA levels, implicating decreased maintenance DNA methylation in the DNA hypomethylation (Richardson et al., 1990 Deng et al., 2001). Dnmt3a, but not Dnmt3b, transcripts were also decreased in lupus T cells (C. Deng and B. Richardson, unpublished data). Mechanisms contributing to the decreased DNA methyltransferase expression and consequent DNA hypomethylation were sought. CD70 was recently found to be overexpressed in lupus T cells as well. CD4+ SLE T cells overexpress CD70 and stimulate...

End interactions in translation and RNA synthesis

Poly(A) binding protein (PABP), either directly (Tarun & Sachs 1996) or via the bridging protein, PABP-interacting protein (PAIP-1) (Craig et al 1998). Additionally, PABP appears to interact directly with ribosomal subunits, likely via the binding of PABP RNA recognition motifs (RRM) to ribosomal RNA (Proweller & Butler 1996 S. Tarun and A. Sachs, personal communication). Stimulation of translation by the 3' UTR has been demonstrated for a number of RNA viruses, including rotavirus (Piron et al 1998), poliovirus (Michel et al 2001), brome mosaic virus (Noueiry et al 2003), barley yellow dwarf virus (BYDV) (Guo et al 2001) and, more recently, DENV (Chiu et al 2005, Edgil et al 2003, Holden & Harris 2004). The mechanism of 3'-end enhancement of flavivirus translation has not yet been fully elucidated but likely involves RNA-protein interactions mediated by structures in the 3' UTR, such as the 3'SL (Fig. 1B). For instance, half of the translational stimulation mediated by the DENV 3'...

Antibodies Against Short Peptides Sometimes Recognize the Native Protein

Not all antipeptide antibodies react with the native protein. As the literature generally publishes only positive results, it may have given a misleading impression. Many unpublished failures have occurred. Antipeptide antibodies are thought to be more likely to react with the native protein if the peptides are derived from the amino- or carboxy-terminus of the protein (Doolittle, 1986). Hydrophilic peptides with charged amino acids may also be favoured because charged residues usually lie on the surface of proteins. Other factors that have been suggested to favour reactivity of antipeptide sera with the native protein are when the peptide is derived from a region of the protein with high mobility (Tainer et al., 1984), or the presence of amphipathic helices (Berzofsky and Berkower, 1993). Unfortunately, most of these predictive procedures are of rather uncertain reliability, as are the computer algorithms that are based on them.

Solid State 15N NMR Spectroscopy

Example for a solid-state CPMAS 15N NMR spectrum of a soil not affected by fire and a fire-affected soil (H. Knicker, unpublished) Fig. 2.11. Example for a solid-state CPMAS 15N NMR spectrum of a soil not affected by fire and a fire-affected soil (H. Knicker, unpublished)

The Vegetative Proteome

Bacillus subtilis, the model organism for gram-positive bacteria, is one of the most advanced bacteria in the context of gel-based physiological proteomics (see Refs. 3, 4 for reviews). In contrast to the genome, which is relatively stable, the pro-teome is highly flexible even in bacterial systems. From a physiological point of view, two major proteome classes can be distinguished proteomes of growing cells, which have mainly housekeeping functions, and proteomes of nongrowing cells, which have adaptive functions against those stress or starvation stimuli that forced the growing cell population into a nongrowing state. According to our DNA array studies, cells growing in a minimal medium that does not contain amino acids, vitamins, or purine pyrimidine bases express about 2500 genes. Of these 2500 genes, 1550 proteins should be visible in the standard window of pi 47. Of the 1550 vegetative proteins, almost 50 have been identified by gel-based proteomics 5 (unpublished results). It...

Molecular Biology of aSynuclein

SNCA maps to chromosome 4q21.3-22 (45). The gene is composed of six exons encoding a 19 kDa, 140 amino acid protein. Alternative splicing leads to two minor transcripts, 128 amino acids, and 112 amino acids (46) that are poorly expressed relative to the full-length gene (47) (unpublished data). The amino terminus (1-67 amino acids) is composed of a consensus motif of 11 amino acids (XKTKEGVXXXX) conserved within synuclein homologues (48). Combined immunocytochemical and subcellular fractionation studies in human brain have shown a-, ft-, and -synuclein are abundant in the neuronal cytosol and present in enriched amounts at presynap-tic terminals (49). Early studies on the zebra finch suggest that a-synuclein has a role in development and in the regulation or support of synaptic plasticity (50). In vitro, both a- and ft-synucleins have been shown to selectively inhibit phosphatidylcholine specific phospholipase D2 (51) whose product, phosphatidic acid, mediates processes controlling...

Maintenance of ES Cells

Careful maintenance of ES cells is crucial for successful germline transmission of gene trap cell lines. We generally change the medium every day, and do not allow the cells to grow to confluence. Several previously published protocols describe procedures for maintaining ES cells on fibroblast feeder layers (15-18). The conditions outlined below apply to the maintenance of a feeder-independent line of ES cells, CGR8, which rely on an exogenous source of DIA (also known as leukocyte inhibitory factor LIF ). These cells are karyo-typically male and were derived from the 129 Ola strain of mice as described (19). Feeder-independent cell lines are more convenient to work with and contribute as efficiently to the germline of mice as feeder-dependent cell lines. We find that 80 of our gene trap cell lines contribute to the germline at an average rate of 1 germline male 10 C57Bl 6 blastocysts injected (Skarnes, unpublished results).

Acquired prion diseases

Kuru reached epidemic proportions amongst a defined population living in the Eastern Highlands of Papua New Guinea. The earliest cases are thought to date back to the early part of the century. Kuru affected the people of the Fore linguistic group and their neighbours with whom they intermarried. Kuru predominantly affected women and children (of both sexes), with only 2 per cent of cases in adult males (41.) and was the most common cause of death amongst women in affected villages. It was the practice in these communities to engage in consumption of dead relatives as a mark of respect and mourning. Women and children predominantly ate the brain and internal organs, which is thought to explain the differential age and sex incidence. Preparation of the cadaver for consumption was performed by the women and children such that other routes of exposure may also have been relevant. It is thought that the epidemic related to a single sporadic CJD case occurring in the region some decades...

Overview Of Bloodocular Barrier Transport Biology

Drug translocation rates are dependent on the functional anatomy and physiology of the eye as well as pharmacokinetics in the serum. Ocular drug transfer may occur by passive diffusion and active transport. Ultimately, the concentrations of drug achieved in the posterior eye depend upon competing rate constants describing uptake and efflux. Studies showing that the renal and ocular eliminations of fluorescein (20) quinolones, and -lactam antibiotics in humans and rabbits are blocked by probenecid (52,70,71) and inflammation (4,49,52,85) provide evidence that these barriers have active transport systems that affect drug concentrations in the eye. In vivo and in vitro studies characterizing the rates of renal elimination of zwitterionic quinolones suggest the presence of separate and distinct carrier-mediated systems (44,52). Studies from our laboratory have shown that the elimination rates of four quinolones examined following direct intravitreal injection were prolonged by both...

The Future Of Molluscan Models From Proteins And Genes To Silicon Chips

Synapse Formation as Revealed Through Brain-Chip Neuron Interfacing. (A) Identified Lymnaea neurons can be successfully interfaced with silicon chips (Kaul, Syed, Fromherz, unpublished data). The cultured cells can either be soma-soma paired (A) or allowed to extend neurites to develop networks (B). This approach has been used to reconstruct specific synapse on the chip which was subsequently used to stimulate and record synaptic activity and plasticity. Figure 2.4. Synapse Formation as Revealed Through Brain-Chip Neuron Interfacing. (A) Identified Lymnaea neurons can be successfully interfaced with silicon chips (Kaul, Syed, Fromherz, unpublished data). The cultured cells can either be soma-soma paired (A) or allowed to extend neurites to develop networks (B). This approach has been used to reconstruct specific synapse on the chip which was subsequently used to stimulate and record synaptic activity and plasticity.

Sources of further information and advice

The data published between 1981 and 2001, as well as unpublished data from their laboratory and from others where the quality of the data could be verified on the basis of the method used. In its 2002 edition, the table contained nearly 1300 entries, representing over 750 different types of foods (Foster-Powell et al., 2002). This database is continuously updated and is available online on the following site http www.glycemicindex.com. On this site, products can be located with the aid of a specific search engine. Furthermore, additional information on GI and GL can be found in several books written by Professor J. Brand-Miller on this subject.

Activation of Unfolded Protein Response Sensors

Where it is cleaved to generate the cytosolic activated form of ATF6 (Shen et al. 2002). Thus, this BiP-regulated activation provides a direct mechanism for the three UPR transducers to sense the stress in the ER. However, in certain cells, different stresses or physiologic conditions can selectively activate only one or two of the ER stress sensors. For example, in B cell differentiation, the IRE1a-mediated UPR subpathway is activated and indispensable while the PERK-mediated UPR subpathway through phosphorylation of eIF2a is not required for the B cell differentiation process (Gass et al. 2002 Zhang et al. 2005). In contrast, in pancreatic p cells, glucose limitation appears to activate PERK prior to activation of IRE1 (Scheuner and Kaufman, unpublished observation). It will be important to elucidate how a general BiP repression mechanism permits the selective activation ofindividual components ofthe UPR that mediate various downstream effects.

With MYCN Amplification and trkA Expression

There is a reproducible correlation between the molecular event of MYCN amplification and the morphological manifestations in pNTs (Shimada et al. 1995 Goto et al. 2001). Those tumors with amplified MYCN typically are of the undifferentiated or poorly differentiated subtype of neuroblastoma (Schwann-ian stroma-poor) with markedly increased mitotic (proliferating) and karyorrhectic (apoptotic) activities (Shimada et al. 1995 Goto et al. 2001), an unfavorable histology group according to the International Neuroblastoma Pathology Classification. The presence of prominent nucleoli in neuroblastic cells of undifferentiated or poorly differentiated neuroblas-toma, often associated with unfavorable prognosis (Ambros et al. 2002), can be an additional hallmark of MYCN amplification (own unpublished observations).

Heat Shock Conditions

There are two purposes for using a heat shock during recovery protocols. First, it eliminates vegetative cells (including vegetative alicyclobacillus) to allow germination of spores without competition from other organisms. Second, it activates spores to germinate and outgrow although the actual increase in spore recovery is not well established. Unpublished results by Parish show as much as a 400 increase in recovery of alicyclobacillus from orange juice by use of a mild heat shock. However, heat shock may not be necessary in finished, shelf-stable, low pH products that do not contain competitive microflora. Further research is warranted to determine the effect of heat shocks on spore viability.

Neisseria meningitidis

As in the S. aureus project, a mini-transposon derived from the eukaryotic Himar1 mariner transposon was used to generate an ordered library of 4548 mutants in N. meningitidis 29 , a human pathogen which is one of the leading causes of fatal sepsis and meningitis worldwide. However, transposition was performed in vitro on N. meningitidis chromosomal DNA, which was subsequently reintroduced into the bacterium by natural transformation where it integrated in the chromosome via allelic exchange. Transposon insertion sites were amplified by ligation-mediat-ed PCR from the chromosomal DNAs of each mutant, which were prepared and stored in 96-well plates, and directly sequenced. As in the previous case, mutagen-esis was performed in a strain 8013 whose genome sequence is not known but is currently being finished (our unpublished data), which temporarily hinders the exploitation of the sequencing results. Nevertheless, using the available N. menin-gitidis genome sequences it was possible to...

Current Activities In Pharmacoproteomics

Differentially expressed protein, HIP PAP-I, secreted at high levels into the pancreatic fluid in 67 patients with pancreatic adenocarcinoma. Another group used cell lines derived from head and neck squamous cell carcinomas to identify proteins differentially expressed in metastases versus the primary tumor (49). A considerable body of published and unpublished data generated by SEREX analyses has been compiled into a database of serological cancer antigens (50).

Mitogen Activated Protein Kinases

Some of the most important and potent mitogenic signals within the GI tract are gut hormones acting through their cell surface receptors, primarily the G-protein coupled class of receptors (GPCRs). Under physiologic conditions, the GPCRs have been shown to activate the MAPK pathway in response to ligand binding.81,85 An increasing number of studies are now examining the role of the MAPK pathway in hormone-mediated cancer proliferation. Not unexpectedly, ERK is stimulated in pancreatic cancer cells in response to the hormones gastrin (via the CCK-B receptor), cholecystokinin, and bombesin.88,89 In our laboratory, we have shown that neurotensin (NT) induces its proliferative effects on colon cancer cell lines expressing the NT receptor by stimulating the ERK cascade.90 Furthermore, we have shown that NT stimulates the JNK pathway in the human pancreatic cancer cell line MIA Paca-2 (unpublished data). JNK cascade activation has also been demonstrated in isolated rat pancreatic acini in...

Peroxynitrite Formation

Another potential mechanism by which oxidant stress may damage tissue is by formation of toxic peroxynitrite. This is highly controversial, given the abundance of intracytoplasmic SOD.2 Oyama et al.55 demonstrated that cytokine induction of NOS2 is associated with evidence of nitrotyrosine formation, a marker of ONOO- production, in canine myocardium. In the setting of cytokine exposure, induction of superoxide-generating systems (eg, xanthine oxidase) has been demonstrated, enhancing the likelihood of peroxynitrite formation.56 We demonstrated a 4-fold increase in xanthine oxidase concentration in dogs with pacing-induced dilated cardiomyopathy and an improvement in myocardial mechano-energetic efficiency in response to xanthine oxidase inhibition with allopurinol.57 We demonstrated cross talk between NOS and xanthine oxidase signaling in the regulation of myocardial energetics (unpublished observations). Whether peroxynitrite formation contributes to these effects remains to be...

Cellular Composition And Organization Of The Adult Mouse

Type B cells incorporate BrdU almost immediately after Ara-C removal. This rapid appearance of mitotic cells suggests that stem cells are recruited into cell division by the absence of progenitor cells (negative feedback loop). If this notion of stem cell induction were true, then one would predict the stem cells themselves to be slowly killed off with continued Ara-C administration. This appears to be the case. Increasing the duration of Ara-C treatment decreases the number of type B cells remaining in the SVZ (Doetsch and Alvarez-Buylla, unpublished observations). With continued Ara-C treatment or local irradiation (60), it may be possible to deplete completely the SVZ of stem cells.

Who uses drugs and why

Polydrug use is the norm on the club scene. Among a sample of Scottish clubbers,(6) individuals had consumed a lifetime average of 11 different drugs. Drug use within the past year included alcohol (96 per cent), cannabis (96 per cent), ecstasy (87 per cent), tobacco (86 per cent), LSD (79 per cent), amphetamine (77 per cent), cocaine (59 per cent), 'poppers' (51 per cent), psylocybin mushrooms (47 per cent), temazepam (39 per cent), diazepam (26 per cent), codeine (19 per cent), heroin (11 per cent), ketamine (7 per cent), solvents (6 per cent), and buprenorphine (6 per cent). Other studies confirm that use of LSD, amphetamine, ecstasy, magic mushrooms, and poppers cluster together among young people. A quarter of all 18-year-olds have tried two or more illegal drugs. In a consecutive sample of 100 patients attending an Oxford drug dependency unit, 22 per cent were regularly using three or more street drugs apart from heroin at presentation (unpublished data).

Immunoglobulin Gene Translocations

Chromosomal translocations involving the immunoglobulin loci are both frequent and critical to the pathogenesis of many chronic lymphoproliferative disorders but are rare in CLL. The incidence of rearrangement involving the BCL2 locus is shown in Table 6-4. Initial studies noted a high incidence of translocation involving the immunoglobulin light-chain loci, but in our own series (unpublished) 10 of 13 cases had t(14 18)(q32q21) translocations. The breakpoints within the BCL2 locus are variable but frequently involve the 5' variable cluster region. Expression of BCL2 protein is high in these cases however it is not clear whether the level of expression differs from that found in the majority of cases of CLL that express BCL2 protein in the absence of BCL2 gene rearrangements. Many cases of immunoglobulin gene BCL2 rearrangements are accompanied by trisomy 12, and the BCL2 rearrangement may be the primary or secondary cyto-genetic abnormality.

CREs as Targets ofthe Cyclic AMP Pathway

The CRE in the promoter region of the AANAT gene has been shown to belong to the class of non-classical non-palindromic elements consisting of a CRE halfsite and a CCAAT enhancer element (8). The promoter of the inhibitory transcription factor ICER contains four CREs (45). As shown for the rat ICER is raised from an alternative intronic promoter of the cyclic AMP-regulated element modulator (CREM) gene (63,61) and its expression is regulated by the NE prADR cAMP-signaling pathway. ICER is able to bind to CREs and leads to repressed transcription. One of the most rapidly and strongly repressed gene is probably ICER itself, since the ICER promoter region consists of four CRE elements (45). ICER also binds to CRE elements in the promoter of AANAT (24 Maronde et al., unpublished observations) and the pradrenergic receptor gene (51).

Tumour spread and staging

Fig. 1.17 Frequency of organ involvement by haematogenous metastasis in patients with metastatic renal cell carcinoma (n 636) at autopsy. H. Moch (unpublished). Fig. 1.17 Frequency of organ involvement by haematogenous metastasis in patients with metastatic renal cell carcinoma (n 636) at autopsy. H. Moch (unpublished).

Comparative Aspects Of Signal Transduction Cascades Regulating Melatonin Biosynthesis

Chicken, trout and most other non-mammalian vertebrate species possess photo-receptive pineal organs. Thus light rather than adrenergic-stimuli appear as primary regulators of the melatonin synthesis in these species. In the chicken pineal organ AANAT mRNA fluctuates, but with a much smaller amplitude than in the rat (36). Thus, chicken AANAT seems to be regulated at both, the transcriptional and the post-transcriptional levels. Accordingly, ICER has been reported to fluctuate diurnally in the chicken pineal organ (25). In the trout pineal organ where melatonin biosynthesis is regulated by light dark stimuli directly perceived in the organ and is not affected by NE,AANAT mRNA does not fluctuate (10). Darkness, the natural stimulus of the trout pineal melatonin biosynthesis, has virtually no effect on CREB phosphorylation (Kroeber et al., unpublished results). Furthermore cAMP and pCREB showed virtually no variation over a 12 h light 12 h dark cycle, whereas melatonin displayed its...

Conclusion And Perspective

CAMP levels, activates PKA, causes phosphorylation of the transcription factor CREB, and stimulates ICER expression (see above). Our findings that NE-induced melatonin biosynthesis is inhibited by PKA-antagonists, but not by CaMK-, PKC-, or MEK1-antagonists suggest an important role of the for both transcriptional regulation of AANAT and melatonin biosynthesis in the rodent pineal organ. Our in vivo investigations with the rat (Maronde et al. unpublished observations) and the C3H mouse (Von Gall et al., unpublished observations) revealed conspicuous diurnal changes in the amount of pCREB and ICER protein related to AANAT expression in both rodent species. Thus, our in vitro observations apparently mirror physiologically relevant changes occuring under in vivo conditions.

Leukemogenesis And Genetic Instability In Chronic Lymphocytic Leukemia

Clonal CD5-positive B-cell populations can be found in more than 80 percent of old mice56 and in 3 percent of healthy people over the age of 60 if sensitive molecular or FISH techniques are employed.57 Nothing is known of the genetic abnormalities in these clonal populations. Patients discovered on a routine blood test to have a slight lymphocytosis with morphological and immunophenotypic features of CLL may have stable disease for prolonged periods. Our own cytogenetic FISH and molecular data (unpublished) on this benign subgroup of stage A patients have shown that heterozygous or homozygous loss of chromosome 13q14 is the only consistent genetic abnormality, identifiable in 70 percent of cases. These data suggest that genetic loss at 13q14 is an early event in CLL and may be associated with prolonged lymphocyte survival, possibly due to resistance to apoptosis. Further ongoing studies to determine

Dopamine Transporter Null Mice

Amphetamine and cocaine dose-dependently retain their capacity to increase DA release in the NA (27). Thus, even in the absence of DAT, this mechanism seems still mandatory for the expression of the rewarding properties of psychostimulant drugs. Moreover, using reboxetine, a specific NET inhibitor, we are able to show a release of DA in the NA of DAT- - mice, which is not the case in wild-type mice or by using fluoxetine. Together, these results indicate that the remaining positive-reinforcing effect of cocaine in the absence of DAT can be mediated by an inhibition of the NET that unusually and specifically activates a release of DA in the mutant mice. Our hypothesis for a contribution of the NE system is further supported by the observation that reboxetine is able to induce by its own a place preference behavior in the DAT-deficient mice only (Marika Nosten-Bertrand and Bruno Giros, unpublished data).

Through Gene Expression Analysis

In some NB cell lines (van Limpt et al. 2000). Further study suggested that DLK1 over-expression was not due to amplification or mutation but was associated with chromaffin differentiation (van Limpt et al. 2003). Data from our own studies suggest that high levels of DLK1 expression is more common in a subset of high-risk NB (unpublished data).

Local Complications After Radiation Synovectomy

Besides an insufficient technique during joint puncture, the use of an inappropriate radionuclide is another possible reason for radionecrosis. A case of severe necrosis with an open wound was reported after injection of Y-90 into an ankle joint, which should be treated with a radionuclide of lower energy and a lower tissue range such as Re-186 (51). Therapy was performed by immediate surgical excision of the necrotic soft tissue and closure was achieved with a fasciocu-taneous lap. In other cases (unpublished data, personal communications), hyperbaric oxygen was successfully used for treatment of superficial radiogenic ulcers. However, owing to the small number of well-documented cases, no reliable guidelines exist for the treatment of radionecrosis after radiation synovectomy.

Which Compartments of Neurons and Nervous Tissues Release Neuromodulators

These borders rather unaffected (see Figure 4.1). Similarly, Nusbaum (2002) has suggested that the action of co-released biogenic amines or peptides may be affected crucially by either the respective uptake mechanisms or the presence of extracellular peptidase activity. With respect to peripheral modulation, locusts provide a good example the octopamine levels in the hemolymph increase within the first ten minutes of flight, yet the octopamine levels of individual flight muscles decrease significantly, as do substances that normally would increase if a muscle is bathed in salines containing high octopamine concentrations (Wegener 1996). This clearly indicates that the octopamine level in the hemolymph and the octopamine level within a muscle represent two different compartments in the intact animal. Preliminary work on the ultrastructure of DUM neuron terminals (Biserova and Pfluger, unpublished) indicates that octopamine may be released towards the basal lamina in some cases and...

Nitric Oxide And Apoptosis

NO may protect the heart by inhibiting apoptosis via different mechanisms. First, NO directly inhibits replication of pathogens such as the coxsackievirus that causes apop-tosis. A lower viral burden means that fewer viral antigens are presented to cytotoxic T lymphocytes that kill infected cells through apoptosis. Second, NO can inhibit pathogen enzymes that trigger apoptosis. For example, NO inhibits the coxsackievirus 3C protease that cleaves BID and triggers the mitochondrial apoptosis pathway (unpublished data). Third, NO can inhibit caspases that are part of the intracellular apoptotic cascade. Caspases are cysteine proteases, and NO can nitrosylate cysteine residues, inactivating enzymes such as caspases that contain cysteine at their active site. Several groups have shown that NO can nitrosylate caspase-3, inhibit caspase activity, and inhibit apoptosis.129-132 Thus, NO may protect the heart and preserve cardiac myocytes by inhibiting cardiac cell death.

HDL2 Pathogenesis Three Hypotheses 51 Poly Amino Acid Toxicity

Alternatively, HDL2 neurotoxicity could arise from expression of long tracts of polyalanine or polyleucine. Long tracts of these amino acids are toxic to cells in culture, and at least one neurodegenerative disease results from an alanine expansion 1 . However, while exon 2A from alleles with normal length repeats is expressed in human brain, to date we have not found evidence for expression of the expanded repeat (Rudnicki, unpublished observations).

Nonhostspecific ectoparasites

Acarina ectoparasites, sometimes attacking humans, include the blood-sucking ticks Ixodes uriea which is common on several sea-bird species and Ixodes ricinus which is probably frequently imported on migratory birds but might be endemic in some localities (Richter 1981). In the 1970s the tropical rat mite Ornithonyssus bacoti was reported to annoy humans living close to nests of the common rat Rattus norvegicus (Richter 1977) and in 2001 the species was again reported to attack owners of Mongolian gerbils (Meriones unguiculatus), which had been kept as pets (Skirnisson 2001). Further species are Cheyletiella parasitovorax, which has caused skin irritation on Persian cat owners (Skirnisson et al. 1997) and C. yasguri (Karl Skirnisson, unpublished data).

Na Channel Subtypes Involved in Generating Persistent Na Current in Myelinated Nerve

These properties of NaV1.6 contribute to the spontaneous and burst-firing of cerebellar Purkinje neurons (Kahliq et al., 2003). NaV1.6, when transfected and expressed in NaV1.8 null neurons, may well generate a persistent current over a wider potential range than NaV1.7 (data presented by Herzog et al. 2003a). Baker and Bostock (1997, 1998) found a low-threshold, persistent TTX-s Na+ current in large diameter DRG neurons in the rat, and Kiernan et al. (2003) found a similar current in about one third of small (

Distribution in the Brain

Very few studies have been specifically dedicated thus far to analyze the distribution in the brain of the two 5a-R isozymes. In adult humans (postmortem samples of the cerebellum, hypothalamus, pons, and medulla oblongata), the combined results of immunoblotting with 5a-R polyclonal antisera, and of RNA blot hybridization, has indicated that apparently only the type 1 enzyme is present (131,132 see also 122 for review). However, in another study, the immunostaining of autopsy specimens has shown the presence of the type 2 enzyme in the pyramidal cells of the cerebral cortex (132). Unpublished results of the authors' laboratory indicate the presence of the RNA coding for both isoforms in the human gray and white matters in samples of the temporal lobe obtained at surgery (Poletti A., Negri-Cesi P., Celotti F., Oppizzi G., Martini L., unpublished observations).

Kinetics of Binding of Monoclonal Antibodies

Individual monoclonal antibodies vary greatly in the kinetics of binding to antigen (Mason and Williams, 1980 Ways and Parham, 1983 Parham, 1984a, b Dower et al., 1984). The binding of individual monoclonal antibodies to the cell surface may reach saturation in as little as 15 min, or as long as 90 min (J. Goding, unpublished data). It seems clear that the rate of association is sometimes limited by more than simple diffusion. These results might be understood in terms of the need for an individual antigenic determinant that is recognized by a given monoclonal antibody to be in a particular (transient) conformation before the antibody can bind. Such slow 'on' rates might be expected to be highly dependent on temperature.

High Throughput Proteomics of Periplasmic Proteins Induced by Growth of A ferrooxidans on Sulfur Compounds

We identified 216 proteins in the periplasm of A. ferrooxidans ATCC 23270, several of them changing their levels of synthesis when growing the bacterium on thiosulfate, elemental sulfur, and ferrous iron media (Fig. 7.4). Thirty-four percent of them corresponded to unknown proteins. Forty-one proteins were exclusively present in sulfur-grown cells and 14 in thiosulfate-grown cells (unpublished results). The putative genes coding for all the proteins were localized in the available genomic sequence of A. ferrooxidans ATCC 23270. The genomic context around several of these genes suggests their involvement in sulfur metabolism and possibly in sulfur oxidation and formation of FeS clusters. Some of the periplas-mic proteins were upregulated by growth on sulfur compounds, for example, the exported P 21, the ModAl and ModA2 putative transporters, and a sulfide quinone oxidoreductase.

Human Myeloma Cell Lines for Fusion

Lines such as RPMI-8226 (Nilsson, 1971), H My-2 (Edwards et al., 1982), IM9 (Everson et al., 1973) and GM-1500 (Croce et al., 1980) are all probably EBV-transformed lymphoblastoid lines, even though most of them arose from patients with myeloma. For a line to be acceptable as a true myeloma, it should secrete large amounts of immunoglobulin of the same idiotype and heavy and light chain isotype as the paraprotein in the patient's serum. EBV-transformed lymphoblastoid lines have low levels of secretion, grow in large clumps, and possess the EBV nuclear antigen (Reedman and Klein, 1973). In a few cases, EBV-transformed cell lines have been found suitable for hybridoma production (Croce et al., 1980 Edwards et al., 1982), although many unpublished failures have occurred.

Is Closely Related to Linear Plasmids of Other Rhodococcus Strains

Functional analysis of the linear replicon pFiD188 has shown that it carries covalently attached proteins on the 5'-terminal ends. However, no extensive TIRs, typical for invertrons, could be detected in pFiD188 (unpublished data). This lack of long TIRs is a common characteristic of several rhodococcal linear plasmids (Kalkus et al. 1998 Stecker et al. 2003 Sekine et al. 2006).

Chromosomes Do not Move Much in Interphase

Our insight into the dynamics of the chromatin class of NE envelope proteins is unfortunately very limited at the moment. Only for one of them, the DNA crosslinker barrier to autointegration factor (BAF), do we have any data from living cells, which mostly addresses the localization of a GFP fusion during nuclear ass embly.42 No FRAP data on the lifetime of chromatin-NE interactions are available at the moment, although for BAF and heterochroma-tin protein 1 it appears as if they might be more dynamic than those reported for the INM, NPC and lamina (J.E., unpublished observations). However, we know more about the dynamics of chromosomes themselves in interphase mammalian nuclei from several approaches. In one approach developed by Daniele Zink and coworkers, chromatin domains are labeled with pulses of microinjected fluorescent nucleotides during replication and can then be traced over several cell cycles.43-45 A second approach pioneered by Andrew Belmont and coworkers employs a...

Intrinsic Ionic Mechanisms Underlying Activity Patterns In Cholinergic Interneurons

HCN (HCN1-4) channels, which are expressed at high levels, also contribute to the pacemaking mechanism (Bennett et al. 2000 Surmeier, unpublished). Spikes in these neurons are broad, reflecting the reliance upon Kv4 (Kv4.2 4.3) and BK channels for repolarization. These broad spikes allow substantial Ca2+ influx through voltage-dependent channels during the spike. Cav1.2, 1.3, 2.1, 2.2, and 2.3 Ca2+ channels are expressed by interneurons. Ca2+ flux through an undefined subset of these channels activates apamin-sensitive SK channels leading to a prominent afterhyperpolarization. These currents pace the single-spike discharge mode of cholinergic interneurons helping to keep it slow and rhythmic in the absence of synaptic input. KCNQ channels are also expressed by cholinergic interneurons, but their functional role has not been critically assessed.

Advent of Molecular Genetics

With cinematographic techniques we proved with fixed living cells that the intracel-lular sulfur globules do not originate at the cellular membrane to be moved to the inner part of the cell - as postulated by Remsen (1978) - but that they are formed at any place in the cell (Herrmann 1984 Herrmann and Truper, unpublished data), which is further proof for the continuity of the intracytoplasmic membrane system.

EGFR signalling in ERpositive acquired endocrineresistant breast cancer cells

Our data has demonstrated that signalling through EGFR HER2 also contributes to the increased migratory and invasive capacity of ERpositive, acquired tamoxifen-resistant (TAM-R) breast cancer cells in vitro. Such resistant cells highly express the EGFR and HER2 together with TGFa and amphiregulin (19). Inhibition of EGFR-mediated signalling in tamoxifen-resistant cells with gefitinib results in a reduction of the cells' migratory and invasive capacity in vitro (3). Furthermore, abrogation of HER2 function through use of Herceptin is also able to partially suppress these cells' aggressive phenotype (S. Hiscox, unpublished observations). Interestingly, time-lapse analysis of TAM-R cell movement has revealed that it occurs in a directional, rather than random, fashion (3). This phenomenon is reported to be controlled by localised EGFR signalling in other cell types including keratinocytes (31), fibroblasts (32), and human mammary epithelial cells (33) as a consequence of the asymmetrical...

Arabitol Dehydrogenase Membrane Bound

Regarding the enzyme structure, ARDH may be composed of two different subunits. The presence of a small open reading frame, which is very similar to the transmembrane region of m-GDH in E. coli, has been shown to be essential for the expression of active SLDH (Hoshino et al., personal communication). Therefore, as in SLDH, subunit II may be buried in the cytoplasmic membrane anchoring ARDH to the outer surface of the cytoplasmic membrane. Because the purified ARDH had a relatively high Q2 reductase activity of 12.3 units per mg of protein, ARDH seemed to be attached to the cytoplasmic membranes in vivo and to link to their electron transfer chain via ubiquinone (Adachi et al., unpublished data). In acetic acid bacteria, sugar alcohol oxidation by the membrane-bound enzyme is in accordance with Betrand-Hudson's rule (Fig. 1.4), that is to say, according to the generalization by Bertrand, the most favorable configuration for oxidation has the erythro form and R-configuration of two...

Fluorescence Scanning

SARS is a serious respiratory illness with significant morbidity and mortality rate (31-37). Its diagnosis depends mainly on the clinical findings of an atypical pneumonia not attributed to any other cause and a history of exposure to a suspect or probable case of SARS, or to the respiratory secretions and other bodily fluids of individuals with SARS. Definitive diagnosis of this novel CoV relies on classic tissue culture isolation, followed by electron microscopy studies to identify the virus in cell culture, which is technically very demanding. Serological testing for increasing titer against SARS-associated CoV was shown to be highly sensitive and specific (32) but was not suitable for quick and early laboratory diagnosis. Molecular tests have also been attempted for the detection of this virus or to confirm infection (48,49). However, only one target was detected in one test using the existing methods, so a higher risk of false negatives was inevitably encountered. Our method is...

Factors Modifying Nicotinic Analgesia 541 Gender Studies

Heterogeneous, outbred populations were used. More recently, Flores et al.,129 have investigated the antinociceptive effect of epibatidine in eight inbred mouse strains using the tail-immersion withdrawal assay. They found that these strains differed significantly in their sensitivity to epibatidine, with DBA 2, BALB c, and A strains showing much greater sensitivity than all others. In particular, the A strain exhibited 20-fold higher antinociceptive potency compared with the C3H He strain. Importantly, the effect of epibatidine was blocked by mecamylamine in both strains, indicating the involvement of neuronal nAChRs in mediating the observed antinociception. Based on these data, Flores et al.,129 suggested that such pharmacogenetic differences most probably derive from pharmacodynamic rather than pharmacoki-netic mechanisms, and this view is supported by findings that similar strain differences in antinociceptive sensitivity using the mouse tail-flick and hot-plate tests were...

How Could Dystrophin Cleavage Lead To Enterovirusinduced Dilated Cardiomyopathy

Important distinctions exist between virus-induced cardiomyopathy and the hereditary absence of dystrophin. In contrast to a genetic defect, enteroviral infection is focal in viral cardiomyopathy. The percentage of virally infected myocytes differs in the various stages of the disease. In the acute stage, up to 7 days after infection with CVB3, more than 10 of myocytes are infected in C3H mice (unpublished observation). This percentage may be high enough that acute cleavage of dystrophin could significantly affect overall cardiac function. A similar mechanism could occur in acute, fulminant myocarditis as is observed in children and young adults. In the chronic stage of murine infection, the percentage of cells with viral persistence appears to be much lower.76 A similarly low percentage has been reported in human heart samples from patients with dilated cardiomyopathy.76

Kell and XK Expression Profiles in Mouse 21 Erythroid Tissues

When Kell and XK proteins are expressed in equal amounts, as in red cells, the cysteine at position 347 of XK is linked to the cysteine at Kell 72 26 . Because Kell and XK are covalently linked it is speculated that they may complement each other's functions. From an evolutionary point of view, XK evolved as early as in vertebrate fish 2 while KEL, in contrast to XK, is only found in birds and higher species after duplication from its ancestor gene ECE1 ECE2 (unpublished data). This suggests that if the Kell XK complex has a separate function than the individual XK or Kell, then the new function of the complex started in warm-blood species.

Use of Sex Steroid Metabolites as Therapeutic Regimens After Trauma Hemorrhage

Similar to DHEA, recent studies have evaluated the role of another metabolite, adiol, in altered cardiac and hepatocellular function after trauma-hemorrhage (Shimizu et al., 2004,2005). Adiol, one of the metabolites of DHEA, has been reported to have greater protective effects than DHEA against lethal bacterial infections and endotoxin shock. Furthermore, adiol has also been reported to produce protective effects after ionizing radiation in mice (Whitnall et al., 2002). Recently, studies from our laboratory have shown that adiol administration after trauma-hemorrhage improves cardiac and hepatic function in male animals. Additional recent findings from our laboratory suggested that adiol ameliorates hepatic functions via activation of PPAR-y (unpublished observations). However, whether adiol affects the cardiac hepatic function either directly or via modulation of sex hormones remains to be established.

INM Proteins Switching Retention Off and Back On

How then do INM proteins move back into the ER in prometaphase and how is the INM subdomain of the ER reestablished If we remind ourselves how INM proteins are targeted in interphase, and take into account the disruptive force of mitotic phosphorylation on proteinprotein interactions the answer becomes immediately clear. In interphase nuclear membrane proteins diffuse between the ER and the INM but are trapped in the latter by selective binding interactions when they meet lamins and chromatin (Fig. 2A). When these interactions are switched off by mitotic phosphorylation in prophase, INM proteins will equilibrate with the ER, since they are no longer retained and set free to diffuse back into the ER (Fig. 2B). Simple diffusion can equilibrate the INM pool with the ER efficiently and rapidly through many connections between INM and ONM and the continuity between ONM and ER. Exactly such an equilibration process from nuclear rim to the ER network can be observed in vivo for several INM...

Mapping and identification of PARK genes an overview

It is likely that the function of the genes not yet identified will even further extend our understanding of the underlying pathogenic mechanisms causing neuronal cell loss. Our groups identified mutations in PD patients in several other genes, such as synphilin-1 (Marx et al., 2003), its interacting protein periphilin (Soehn et al., submitted), Omi HtrA2 (Strauss et al., 2005), 14-3-3zeta-like (Mosbacher et al., unpublished), and cerulo-plasmin (Hochstrasser et al., 2005) which will direct our search for pathomechanisms in neurodegeneration also towards phosphorylation, proteolytic digestion, and iron metabolism.

Replication of flaviviruses

The terminal 100 nucleotides of the flavivirus positive-strand RNA 3' UTR form a conserved stem loop (Brinton et al 1986, Hahn et al 1987), termed the 3'SL. The 3'SL mediates binding to NS5, NS3 (Chen et al 1997), NS2A (Mackenzie et al 1998), elongation factor 1A (Blackwell & Brinton 1997), La (Garcia-Montalvo et al 2004), PTB (De Nova-Ocampo et al 2002) and other host proteins (Blackwell & Brinton 1995) (S.M. Paranjape and E. Harris, unpublished results), based on studies with the flaviviruses WNV, KUN, JEV and DENV. Mutations in the 3'SL reduce translation of DENV reporter RNAs and replicons (Holden & Harris 2004, Holden et al 2006) and negatively impact flavivirus replication and viability (Blackwell & Brinton 1997, Men et al 1996, Tilgner et al 2005, Zeng et al 1998). Additional conserved sequence motifs and predicted secondary structures are found along the length of the flavivirus 3' UTR (Olsthoorn & Bol 2001, Proutski et al 1997) that play a role in flaviviral RNA synthesis...

Parameter Estimates from Fitting the Logistic and Linear Survival Models to the Data in Table

These models were fitted to unpublished data on survival of Pediococcus sp. NRRL B2354 heated at 62 C (Table 2.3), using Prism as described above. The results of the fitting are shown in Table 2.4, and in Figure 2.7. The logistic model was slightly better than the linear, with a smaller RMSE. Because of the sharp breakpoint between the shoulder and exponential decay, the D-value for the linear model was slightly larger, while the lag phase was only marginally greater than that in the logistic model. As was found with growth models, there is often little to choose between different models thus personal preference and experience often dictate which model is generally used. A more complete discussion of model fitting may be found in Chapter 4.

Hcholf Diets And Triglyceride Metabolism

When the effects of raised CHO consumption are tested in an isoenergetic setting, a clear and large stimulation of de novo lipogenesis is observed only in subjects fed liquid formula rich in mono- or disaccharides.61-63 No stimulation3263 or only moderate stimulation (unpublished data) was observed in subjects fed high-CHO diets rich in complex CHOs. All these studies investigated mainly control subjects. It is important to know whether subjects at risk of developing hyperlipidemia, e.g., obese people, have increased hepatic lipogenesis and are more responsive to the effects of high-CHO diets. Lastly, the effect of high-CHO diets on adipose tissue lipogenesis should be investigated because a stimulating effect may on a long-term basis promote the development of excessive fat mass. Adipose tissue lipogenesis is usually considered less active than hepatic lipogenesis and therefore a minor metabolic pathway in humans.67,68 Recent studies suggest that human adipose tissue lipogenesis may...

Immunological Detection of TonEBP

Like many other transcription factors, TonEBP is in low abundance in cultured cells and tissues. This is probably why many of the commercially available antibodies do not yield positive results. We find that rabbit polyclonal antibodies raised against the N-terminal 472 amino acids (Miyakawa et al., 1999) and the C-terminal 300 amino acids (unpublished) work well in many procedures. It should be noted that TonEBP is extremely prone to proteolysis, probably because much of the molecule is unstructured or disordered. Extra care should be used to minimize proteolytic degradation, especially for quantitative analysis.

Self Administration of Psychostimulants

The importance of stress levels of corticosterone in drug self-administration is confirmed by work showing that the decrease in cocaine intake induced by adrenalectomy is reversed by administration of high (stresslike) doses of corticosterone, via corticosterone in the drinking solution of the animals (29). It is still uncertain whether these effects of stress levels of corticosterone are mediated by MRs or GRs. Mantsch et al. (75) suggested a role for MRs. In their study, treatment with GR agonist dexamethasone prevented acquisition of cocaine self-administration. This effect, attributed to the decrease in corticosterone following dex-amethasone, was reversed by the MR agonist aldosterone. It is also possible, however, that GRs are involved in these effects. Adrenalectomized rats receiving replacement of low levels of corticosterone (probably only saturating MRs) do not maintain self-administration. Instead, high levels of the hormone (probably activating GRs) are necessary for...

Sulfur Compound Dynamics in C tepidum Batch Cultures

C. tepidum is capable of using multiple forms of reduced sulfur with differing redox potentials to feed into the photosynthetic electron transport chain. In a typical batch culture medium, both sulfide and thiosulfate are provided to the cells (Wahlund et al. 1991). Under these conditions, sulfide is oxidized first and elemental sulfur accumulates as extracellular sulfur globules. Elemental sulfur accumulation is stoichiometric relative to the sulfide consumed, with small amounts of thiosulfate produced in some experiments (L.K. Chan, R.M. Morgan-Kiss, T.S. Weber, and T.E. Hanson, unpublished results). It has been reported that sulfide is required for the growth of C. tepidum (Wahlund et al. 1991) however, recent experiments in our laboratory and others have shown that this is not the case and that C. tepidum can be grown with thiosulfate and elemental sulfur as electron donors in the absence of exogenously provided sulfide (data not shown). Sulfate is the final product of anaerobic...

Mutations Affecting Sulfur Oxidation Have Secondary Effects on Light Harvesting

Strain C5 is also severely compromised for growth (Chan et al. 2007) and sulfur oxidation (L.K. Chan, R.M. Morgan-Kiss, T.S. Weber, and T.E. Hanson, unpublished results) therefore, we propose that the observed alterations in light harvesting and antenna function are a secondary result of defects in sulfur oxidation pathways. Similar effects were seen in a strain of C. tepidum lacking the ribulose-1,5-bisphosphate carboxylase oxygenase (Rubisco) like protein encoded by CT1772 that was also defective in thiosulfate oxidation (Hanson and Tabita 2001). The major difference between these two strains is that the Rubisco-like protein mutant had a decrease in the level of bacteri-ochlorophyll per protein, while strain C5 displays no such defect. These results suggest that C. tepidum regulates the function of its antenna apparatus in response to the availability of reductant, as has been reported by others working with chlorosomes in Chloroflexus aurantiacus and C. tepidum (Wang et al. 1990...

How to Identify TonEBP Target Genes

As of this writing, nine genes are known to be stimulated transcriptionally by TonEBP SMIT1, BGT1, TauT, AR, NTE, HSP70, AQP2, UT-A, and TNFa. Unpublished work from the authors' laboratory and others indicates that there are more genes regulated by TonEBP, that is, TonEBP target genes. Identification of all the TonEBP target genes is essential to understanding the biology of TonEBP and osmotic regulation. This section describes strategies used to identify novel TonEBP target genes.

Chapter References

Hartung, T.K., Schofield, E., Short, A.I., Parr, M.J.A., and Henry, J.A. (1998). Hyponatremic states following MDMA ingestion (unpublished). Henry, J.A., Jeffreys, K.J., and Dawling, S. (1992). Toxicity and deaths from 3,4-methylenedioxymethamphetamine. Lancet, 340, 384-7. Linden, C.H., Kulig, K.W., and Rumack, B.H. (1985). Amphetamines. Trends in Emergency Medicine, 7, 18-32. O'Connor, B. (1994). Hazards associated with the recreational drug 'ecstasy'. British Journal of Hospital Medicine, 52, 507-14.

Pleiotropic Actions Of Metabolism

Metabolic Signals for Cardiac Growth. A case in point is the mammalian target of rapamycin (mTOR), an evolutionary conserved kinase and regulator of cell growth that serves as a point of convergence for nutrient sensing and growth factor signaling. In preliminary studies with the isolated working rat heart, we found that both glucose and amino acids are required for the activation of mTOR by insulin (Sharma et al., unpublished observations). In the same model we observed an unexpected dissociation between insulin stimulated Akt and mTOR activity, suggesting that Akt is not an upstream regulator of mTOR. We found that, irrespective of the stimulus, nutrients are critical for the activation of mTOR in the heart (Sharma et al., unpublished observations). The studies are ongoing. In preliminary experiments, we observed that altered glucose homeostasis through feeding of an isocaloric low carbohydrate, high fat diet completely abolishes MHC isoform switching in the hypertrophied heart...

Effect of nondigestible oligosaccharides on glucose and lipid metabolism a phenomenon linked to a decrease in food

Carbohydrate diet, a decrease in hepatic and serum triglycerides is observed when inulin-type FOS are added to the diet at concentrations from 2.5 to 10 for several weeks (from 2 to 12 weeks) (Delzenne & Williams 2002). In animals, reduced triglyceridaemia is often linked to a decrease in de novo lipogenesis in hepatic, but not in adipose, tissue, cells. A decrease in the expression of key hepatic lipogenic enzymes, reflected by a decrease in fatty acid synthase mRNA, seems to be involved in the lower lipogenic capacity after inulin-type FOG supplementation, as also shown with resistant starch (Delzenne et al. 2002). In rats fed a lipid-rich diet containing 10 FOS, a decrease in triglyceridaemia also occurs without any protective effect on hepatic triglyceride accumulation and lipogenesis, suggesting a possible peripheral mode of action (Kok et al. 1998b). By contrast, in obese Zucker rats, dietary supplementation with FOS lessens hepatic steatosis, with no effect on post-prandial...

Proteomic Analysis of Subcellular Fractions

Quinone oxidoreductase that is likely a peripheral-membrane protein (Shahak et al. 1992), to this outer-membrane fraction also supports this notion (L.K. Chan, R.M. Morgan-Kiss, T.S. Weber, and T.E. Hanson, unpublished results). The outer-membrane and peripheral-membrane fraction has been examined by heme staining after electrophoresis and three hemoproteins were revealed (Chan et al. 2007). These are currently being identified (R.M. Morgan-Kiss, L.K. Chan, and T.E. Hanson, unpublished results). Given the caveat regarding the composition of the outer-membrane fraction, these hemoproteins may be either peripheral-membrane proteins or outer-membrane proteins. The C. tepidum genome encodes 26 potential hemoproteins that contain a consensus CXXCH heme attachment motif. Fifteen of these are associated with functional annotations and represent expected hemoproteins of the Dsr complex, Sox system, and others. The remaining 11 potential hemoproteins are not functionally annotated. If any of...

The Expression of Sensitization

Given the enduring changes in neurotransmission in the nucleus accumbens, and potentially in afferents to the nucleus accumbens from the PFC, it is not surprising that the search for changes in gene expression that may underlie the neuroadaptations in transmission has focused on the nucleus accumbens. The hallmark of a change in gene expression that may be critical for the expression of enduring sensitization is that the alteration be present for weeks after discontinuing repeated drug administration. In addition, a particularly compelling temporal characteristic would be a change in gene expression that is not manifest during the repeated injection period or during the first few days of withdrawal. A number of genes fall into this temporal category and many are related to pre- and postsynaptic glutamate transmission, including mGluR5, Homer1bc, and mGluR2 3 (57,60). In addition, other proteins with this temporal characteristic include AGS-3 and the adenosine 1 and TrkB receptor...

Location of the Disulfide Bridges and the Potential Sulfur Binding Site

To date, most biochemical data have been generated using the SoxYZ heterodimer (Friedrich et al. 2000 Rother et al. 2001 Quentmeier and Friedrich 2001 Quentmeier et al. 2003), which is generally believed to be a stable, obligate complex that is only active in the form of a heterodimer. A combination of structural and biochemical results, however, suggests that the individual proteins, apart from forming a SoxYZ complex, may also exist on their own. First, a recently determined SoxZ structure, showing an apparent dimer, indicates that also this protein can be stable without being associated with another protein (pdb 1v8h, unpublished data). Second, the SoxY structure discussed here exhibits specific intersubunit interactions, which argues against the notion that SoxYZ is an obligate complex in which both components depend on each other for their folding and structural integrity.

Borreliatick Relationships

The figure shows that the only tick that was reported to be able to experimentally transmit a Borrelia sp. other than its usual pair mate was Ornithodoros moubata, the usual vector of B. duttonii in sub-Saharan Africa. This tick was able to transmit to laboratory animals Borrelia crocidurae and Borrelia hispanica as well as B. duttonii. Previously, it had been shown that there was cross-immunity between B. duttonii and B. crocidurae (Schlossberger & Wichmann, 1929). These three species are also highly similar by the criterion of rRNA and other sequences (Marti Ras et al., 1996) and could otherwise be considered as different strains of the same species (A. G. Barbour & J. Bunikis, unpublished findings). The two other species that O. moubata was reported to have transmitted were B. hermsii and B. parkeri, which are genetically distant from each other and from B. duttonii (Marti Ras et al., 1996) (unpublished studies). However, Davis (1942) also noted that the O. moubata ticks infected...

Membrane Associated Proteins

Preliminary findings support this suggestion. Membrane proteins were separated by gel electrophoresis, digested with trypsin, and peptide sequences were established using a nano-HPLC system connected to a LTQ-Fourier mass spectrometer. Proteins were identified by searching peak lists containing fragmentation spectra against the NCBI Homo sapiens protein sequence data-base, and annotated by function, biological process and or cellular localization. A first analysis of a proteomic inventory of the membrane fraction of erythrocytes from HDL2 patients shows no obvious changes in the number of membrane and cytoskeleton proteins. However, these data do indicate a NA-associated increase in the membrane association of metabolic enzymes, components of the proteasome, and small G proteins (Fig. 5). These results are in general agreement with the growing awareness, based on comparable pro-teomic analyses, of the complexity of the erythrocyte proteome, and more particularly of the presence of an...

Do Neurosteroids Act As Endogenous Modulators Of Glutamate Receptor Function

Sulfated steroids, including PREGS, have been measured in brain (1,91,94,101), but the concentrations of sulfated pregnane steroids have not been determined. If present in the brain at sufficient concentration, PREGS may constitute an additional mechanism for modulation of neuronal activity. Elevation of PREGS levels during CNS damage could constitute an innate neuroprotective mechanism. PREG and pregnanolone do not modulate NMDA-induced currents (19,56), and we have shown that neither of these steroids modulates NMDA-induced neuronal death (C. E. Weaver, Jr., unpublished data). Sulfation therefore converts an inactive neurosteroid to an active form, suggesting that steroid sulfotransferases and sulfatases may play an important role in the modulation of NMDA receptor function in the CNS. It is interesting to note that the apparent KMs for PREG sulfatase measured in adult hippocampus and hippocampal cultures are in the low micromolar range (10 and 14 M respectively C. E. Weaver, Jr.,...

Microscopic Findings in Idiopathic Myocarditis

The resemblance of this type of myocarditis and acute cellular rejection of the cardiac allograft was described34 (Gopal S, Achalu R, Day JD, Huang M, Narasimhan U, Day MT, Kasper EK, Trichon BH, Chen CL, Cina SJ, Berry GJ, Robertson AL, Hruban RH, unpublished data). The cardinal features of acute allograft rejection are the presence of inflammatory cells and presence or absence of myocyte damage. The category of borderline myocarditis reflects the presence of inflammatory cells without concomitant myocyte damage and resembles the categories of focal or diffuse mild acute rejection. Typically, the infiltrates are sparse and are predominantly lymphocytic in nature. Occasional neutrophils or eosinophils may be found admixed within the infiltrate. They are more commonly distributed in the perivascular tissue spaces (Fig. 14-1 A see color plate 21). In more advanced or severe cases of myocarditis, myocyte damage or necrosis is conspicuous. The architectural patterns include focal (Fig....

Pathology of Human Myocarditis Ultrastructural Immunohistochemical and Molecular Findings

Immunologic studies have expanded our understanding of the pathogenesis of this disease process. Immunofluorescence studies of cases of active myocarditis showed the presence of the third component of complement (C3) in 50 of cases this diminished with resolution of the inflammatory lesions.36 Indirect immunofluorescence studies also identified increased staining for antibodies directed against sarcolemmal antigens and myofibrillar components in biopsy samples showing resolving myocarditis. Different investigators reported immunophenotypic profiles of the infiltrating cells37'38 (Gopal S, Achalu R, Day JD, Huang M, Narasimhan U, Day MT, Kasper EK, Trichon BH, Chen CL, Cina SJ, Berry GJ, Robertson AL, Hruban RH, unpublished data). The majority of lymphocytes are CD3+ T cells with helper and suppressor subtypes. Macrophages and natural killer cells are also present, but B cells are infrequent or absent (Fig. 14-3 see color plate 23). Up to 25 of lymphocytes stain for Bcl-2, and 27 of...

Abundance of the sox Genes in Bacteria

Among the bacteria listed in Fig. 12.2 several strains are unable to grow chemotrophically with thiosulfate like, e.g., Ralstonia eutropha. Transfer of the P. pantotrophus sox structural genes to R. eutropha does not add this physiological trait (F. Bardischewsky, unpublished data). For other strains like, e.g., Bradyrhizobium japonicum, Nitrobacter hamburgensis, Polaromonas sp., or Methylobium petrophilum, chemoautotrophic growth with inorganic sulfur compounds is unknown. On the other hand enzymes involved in sulfur oxidation have been described from chemotrophic and phototrophic bacteria, the respective genes of which were not identified (reviewed in Brune 1989 Kelly et al. 1997 Friedrich 1998).

Chromosomes A Complex Template for Nuclear Assembly

We understand even less about the mitotic dynamics of peripheral chromatin proteins linked to the NE than we know about the mechanism of NPC disassembly and reassembly. From the limited data available, it appears that chromosomes retain at least some of their NE adaptor proteins in mitosis. In intact cells, only the behavior of a GFP fusion to barrier to autointegration factor (BAF) has been described. The GFP tagged protein appeared soluble in mitosis and assembled on chromatin concomitantly with one of its binding partners the INM protein emerin.42 However this data is in conflict with previous localization of BAF to mitotic chromosomes85 and it remains to be tested if the GFP fusion employed is DNA binding competent, as other GFP-BAF fusions show different behavior (J.E. unpublished observations). Another important group of peripheral chromatin proteins, the heterochromatin protein 1 family has also been localized to chromosomes in mitotic cells using antibodies.86 Similar to BAF,...

Versatile Neuroprotection

Some studies that attempt to dissect PARKIN function further show that PARKIN inhibits the JNK signaling pathway in an E3-activity-dependent manner and that JNK is activated in cells expressing mutant PARKIN (109). Although PARKIN E3 ligase activity may be required for PARKIN-mediated neuroprotection, the E3 ligase activity may not be associated with proteasome degradation pathways. PARKIN has been described in a number of cell lines to protect cells against death initiated by proteasome impairment (97,110). This paradox may best be rationalized by assuming that, at least in the case of delaying cell death associated with proteasome inhibition, physiologically relevant PARKIN function may be independent of the proteasome and protein degradation. This notion is supported by in vitro data suggesting that PARKIN typically forms ubiquitin linkages not recognized for degradation through the proteasome, as discussed in earlier in this chapter. In other studies that attribute a more...

The Physiological Function of the Flavoprotein SoxF

Preincubation of SoxYZ with 1 mM TCEP prior to reconstitution of the Sox enzyme system selectively inactivates SoxYZ as evident from the 50-90 decrease in thiosulfate-oxidizing activity of the system. Reduction of the other Sox proteins prior to reconstitution of the Sox enzyme system does not affect its thiosulfate-oxidizing activity (A. Quentmeier, unpublished data). Changes in the redox state of redox-active proteins are often linked to conformational changes upon change in the charge of metals, heme iron ligation, or protein disulfide formation as is known from cytochromes, thioredoxins, flavodoxin, photosystem I and II, or regulatory proteins (Takano and Dickerson 1980 Swenson et al. 1999 Arnesano et al. 2003 Lee et al. 2004 Range et al. 2006 reviewed in Ritz and Beckwith 2001). Infrared spectroscopy of SoxYZ suggests a conformational change upon various treatments of the protein (P. Hellwig, unpublished data). Addition of SoxF of P. pantotrophus to the Sox enzyme system...

Quantifying The Risk Of And Risk Factors For Serious Adverse Events Associated With A Medication

In the United Kingdom, patients frequently start lamotrigine through a specialist and prescribing is then transferred to the GP. Because PEM and GPRD are GP-based, these studies cannot capture the initial period of drug exposure for some patients and may not capture some adverse events occurring prior to the transfer of prescribing to the GP. Unpublished GPRD data have shown that 31 -38 of GPRD lamotrigine users in 1993-1994 (predominantly adults) initiated lamotrigine therapy through non-GPs (Drug Research Unit, personal communication). Given the durations of non-GP prescribing, it was estimated that PEM or GPRD might not include up to 20 -27 of events leading to discontinuation within seven days of therapy in new lamotrigine users of all ages. A more recent analysis showed that 61 of children aged

Stress Hormesis and Lifespan in C elegans

High doses of ionizing radiation reduce the lifespan of C. elegans, but low doses induce moderate lifespan extensions (4). We reproduced this result (S. Honda, Y. Honda, and S. Suzuki, unpublished observation) but Cypser and Johnson (7) found no lifespan extension by low-dose ionizing radiation as well as UV. These hormetic effects may be weak and occasional.

The Periplasmic Partners of SoxV for Transfer of Electrons

The electron donor to reduce SoxV is presumably a cytoplasmic thioredoxin as the thioredoxin is reduced by SoxV. SoxW, however, is not essential for thiosulfate oxidation in vivo (Bardischewsky et al. 2006a). Recently, the periplasmic thiore-doxin SoxS was identified to be essential for thiosulfate oxidation as is evident from a homogenote mutant strain GBQS in which the soxS gene is disrupted by the Q-Kmr interposon. This mutant forms about 10 of the specific thiosulfate-oxidizing activity as compared with the wild type. In this mutant, trans complementation of soxS restores the wild-type phenotype (G. Orawski, unpublished data). Also, similarly as in the mutant GBQV (Fig. 12.3) the mutation in strain GBQS can be complemented chemically by inclusion of 1 mM DTT to the mineral medium to yield almost the wild-type level of thiosulfate-oxidizing activity (F. Bardischewsky, unpublished data). SoxY appears predominantly in the reduced state since AMS binds to SoxY and increases the...

Cancer Treatment Modalities

Through a specific interaction with an intracellular target (i.e., RNA, DNA, or microtubules) resulting in its dysfunction. The second stage involves the recognition by the cell of homeo-static disruption (i.e., p53 response to DNA damage). In the third stage, the cell determines the severity of the insult, and makes the decision whether to repair the injury or proceed to apoptotic cell death. Finally, stage four is the induction of the apoptotic machinery leading to the morphological and biochemical features of this process. Although many chemothera-peutic agents are used to treat GI malignancies, the specific mode of action of each drug in relation to the induction of apoptosis is not well understood.71 The observation that antitumor drugs with disparate modes of action converge to induce cell death by apoptosis suggests that it is not the drug-induced lesion that causes apoptosis, but subsequent events such as disruption of growth.71 Indeed many of the current chemotherapeutic...

Receptors Other than CB1

However, contrary to expectation, a number of anandamide-induced effects, although they are similar to THC-induced effects, could not be inhibited by the CB1 receptor antagonist. For example, in mice, anandamide-induced effects in the tetrad were antagonized by neither SR141716A (73,80) nor by LY320135 (Fride et al., unpublished observations). Further, SR141716A blocked the antinociceptive effects of THC in mice much more efficiently than those of anandamide (74). This phenomenon has been explained as a pharmacokinetic effect, since inhibition of anandamide-induced effects in the tetrad was accomplished when either a (nonspecific) FAAH inhibitor, phenylmethylsulphonyl fluoride (PMSF), was co-administered with anandamide in order to enhance its half-life, or when a stable analog was administered instead of anandamide (81) (see also review by Nakamura-Palacios and colleagues 82 ). It is still not clear, however, why the CB1 antagonist should only reverse the effects induced by...

Potential for Expanding Current Capabilities

The production of increasingly smaller sensing spots on the planar surface not only results in increased multi-analyte capabilities but also, according to Ekins, should increase the sensitivity of the system (Ekins, 1995, 1998). Ekins suggested that under static or equilibrium conditions diffusion rates play an important role in the determination of the association rate. It is thought that the smaller the spot area, the lower the diffusion constraints become on the rates of association, and hence higher signal-to-noise ratios are attained in shorter time periods. However, in a number of TIRF studies using planar waveguides, flow cells and flow conditions are used which minimize diffusion limitations. Sensitivity therefore becomes a function of the method of detection, rather than an issue of the spot size (Sapsford et al., 2001). The power of the larger scale arrays has been demonstrated using both DNA chips (Brown and Botstein, 1999 Lockhart and Winzeler, 2000 Gullans, 2000 Knight,...

Future Perspectives and Conclusions

Although abnormal telomere lengths have been detected in somatic cell clones, the proliferative lifespan of somatic cells appears to be conserved after nuclear transfer (48). Primary sheep fibroblasts derived from fetal clones displayed the same proliferative capacity and rate of telomere shortening as the donor cell lines even though initial telomere lengths were significantly shorter (48). These results suggest that cellular senescence is not triggered by a predetermined short telomere but is genetically determined. Recent studies have shown that senescence is triggered through abrogation of the telomere structure rather than its overall length (22-24). However, the ramifications of shorter telomere lengths before entry into cellular senescence would be an increased likelihood of chromosomal instabilities in animal clones. Indeed, higher chromosomal abnormalities have been observed after somatic cell cloning in both primates (68) and cattle ( 69 Betts and King, unpublished data)...

Combinatorial Transcriptional Code for Controling EMT during Neural Crest Delamination

It is striking that, among the different transcription factors characterized in neural crest cells at the time of their segregation from the neural tube, none of them exhibit expression patterns matching precisely with delamination, suggesting that this step is essentially dependent on transcriptional events occuring during the previous specification step. However, recent studies allowed to pin down factors that mark precisely crest cell delamination more reliably than Slug or Rho-B for example. Ets-1, a member of the Ets family of winged helix-turn-helix transcription factors has been found to be dynamically expressed in delami-nating crest cells at cranial levels (ref. 65 and E. Theveneau, M. Altabef, and J.-L. Duband, unpublished results). At the midbrain level, for example, its expression starts in prospective crest cells just after apposition of neural folds, at the 5-6 somite stage, i.e., about 4-6 hours before onset of migration, and it persists in the dorsal neural tube until...

Histopathological Findings

Although neutrophilic infiltration in a Japanese AIP patient has not previously been reported in the literature, one of our cases showed LPSP with eosinophilic infiltration (unpublished observation). The ductal lumen was narrowed by the infolding wall, typically a star-like or slit-like appearance (fig. 2). Even when lymphoplasmacytic infiltration is seen in the ductal epithelium, it is not desquamated. Neither protein plugs nor pancreatic stones were identified histologically. However, such a clinical case was reported as showing pancreatic stone in long-term follow-up in an AIP patient.

Regulation of Neural Crest EMT by a Balance between BMP4 Noggin and Sonic Hedgehog

The BMP-4-signaling cascade controls neural crest cell delamination primarily through regulation of adhesion events associated with EMT. As mentionned above, when added to chick neural tube explants, both TGF-p and BMP-4 promote substrate-adhesion of neural crest cells through activation of (3l-integrins (ref. 8 and A. Jarov, C. Fournier-Thibault and J.-L. Duband, unpublished). In addition, BMP-4 can induce in a temporal sequence expression of, first, Slug and cadherin-6B, then Rho-B and finally cadherin-7. Conversely, inhibition of BMP-4 by Noggin in chick embryo causes a severe repression of Rho-B, cadherin-6B but, surprisingly, not of Slug.47 A likely explanation is that Slug is regulated by several independent processes that might compensate for the lack of BMP signals. In support of this, functional Lef-binding sequences have been isolated in the Xenopus Slug-gene promoter, suggesting that it might also be controled by Wnt signals.73 However, the timing of appearance of these...

Tlrs Formulate Appropriate Responses To Specific Pathogens

It has long been known ihat macrophages identify specific pathogens within their phagosomes and then formulate appropriate defensive responses. TLRs 1, 2, and 6 are recruited to the phagosome, where they can sample the contents, and define the nature of the threat 35,78 . In principle, the macrophage can identify pathogens by integrating a variety of different TLR-mediated signals. It has been shown that TLR2 and TLR4 can discriminate between Gram-positive and Gram-negative bacteria. Also, as discussed above, TLR5 detects (lagellin. Thus activation of TLR2 and TLR5 by a bacterium within the phagosome would imply the presence of a Grampositive flagellated bacterium. Similarly, activation of TLR4 and TLR5 implies ihe presence of a Gram-negative llagellaied bacterium. In principie, the host cell could use all oT its TLRs to precisely read the molecular bar code displayed by the pathogen, integrate the information and formulate a specilic response by, for example, the differential...

The Association Of Tlrs With Human Disease

Several SNPs have been reported in both 77r2 and Tlr4 that may influence the susceptibility to infectious diseases 81-83 . One TLR4 polymorphism, resulting in the amino acid substitution Asp299Gly, may be associated with increased susceptibility to Gram-negative bacterial infections, 81,84-86 and protection against atherosclerosis 87 . In a small study of leprosy patients in Korea, an Arg677Trp SNP in TLR2 was found to be associated with the lepromatous, but not the tuberculoid form of the disease 83 . The Arg677Trp mutation results in a form of TLR2 that is unable to signal, further supporting a functional link between this TLR and effective resistance to M. leprae (P-Y. Bochud, unpublished results). Recently a mutant, non-signalling, form of TLR5 that is expressed with high frequency in human populations was identified (T. Hawn, unpublished results). The presence of this allele is predicted to alter the susceptibility to infec

Self Publishing a Book The Easy Way

Self Publishing a Book The Easy Way

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