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A reverse-phase isocratic HPLC method is described for direct simultaneous assay of ATP, ADP, AMP, S-adenosylmethionine, S-adenosylhomocysteine, S-adenosylethionine, and other adenine derivatives in liver microbiopsies. The procedure was tested in conditions which alter the hepatic content of adenine nucleotides and sulfur-adenosyl amino acids in humans, rats, and guinea pigs. 相似文献
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New common nomenclature for glycoprotein genes of varicella-zoster virus and their glycosylated products. 总被引:21,自引:14,他引:7
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A J Davison C M Edson R W Ellis B Forghani D Gilden C Grose P M Keller A Vafai Z Wroblewska K Yamanishi 《Journal of virology》1986,57(3):1195-1197
The accumulation of recent data concerning the reactivity of monoclonal antibodies with particular varicella-zoster virus (VZV) glycoproteins and the mapping of several of their respective genes on the VZV genome has led to a unified nomenclature for the glycoprotein genes of VZV and their mature glycosylated products. Homologs to herpes simplex virus glycoprotein genes are noted. 相似文献
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Two topics that have attracted recent attention in the field of autophagy concern the source of the membrane that is used to form the autophagosome during macroautophagy and the role of noncanonical autophagic pathways. The 2 topics may converge when considering the intersection of autophagy with viral infection. We suggest that noncanonical autophagy, which is sensitive to treatment with brefeldin A, may converge with the infectious cycles of certain DNA and RNA viruses that utilize membrane from the ER and cis-Golgi. 相似文献
6.
Zhang H Dessimoz J Beyer TA Krampert M Williams LT Werner S Grose R 《European journal of cell biology》2004,83(1):3-11
Alternative splicing in the extracellular domain is a characteristic feature of members of the fibroblast growth factor receptor (FGFR) family. This splicing event generates receptor variants, which differ in their ligand binding specificities. A poorly characterized splice variant is FGFR1-IIIb, recently found to be a functional FGF receptor predominantly expressed in the skin. Here we show that FGFR1-IIIb is expressed in normal and wounded mouse skin. Reduced expression of this type of receptor was found in wounds of healing-impaired genetically diabetic mice, suggesting that downregulation of FGFR1-IIIb is associated with wound healing defects. To address this possibility, we deleted the IIIb exon of FGFR1 in mice. The lack of FGFR-IIIb did not alter the expression of either FGFR1-IIIc, other FGF receptor genes or of FGFR1-IIIb ligands in normal and wounded skin. Histological analysis of the skin of FGFR1-IIIb knockout animals did not reveal any obvious abnormalities. Furthermore, full-thickness excisional skin wounds in these mice healed normally and no defects could be observed at the macroscopic or histological level. Finally, several genes that encode key players in wound repair were normally expressed in these animals. These data demonstrate that FGFR1-IIIb is dispensable for skin development and wound repair. 相似文献
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Wound-healing studies in transgenic and knockout mice 总被引:4,自引:0,他引:4
Injury to the skin initiates a cascade of events including inflammation, new tissue formation, and tissue remodeling, that
finally lead to at least partial reconstruction of the original tissue. Historically, animal models of repair have taught
us much about how this repair process is orchestrated and, over recent years, the use of genetically modified mice has helped
define the roles of many key molecules. Aside from conventional knockout technology, many ingenious approaches have been adopted,
allowing researchers to circumvent such problems as embryonic lethality, or to affect gene function in a tissue-or temporal-specific
manner. Together, these studies provide us with a growing source of information describing, to date, the in vivo function
of nearly 100 proteins in the context of wound repair.
This article focuses on the studies in which genetically modified mouse models have helped elucidate the roles that many soluble
mediators play during wound repair, encompassing the fibroblast growth factor (FGF) and transforming growth factor-β (TGF-β)
families and also data on cytokines and chemokines. Finally, we include a table summarizing all of the currently published
data in this rapidly growing field. For a regularly updated web archive of studies, we have constructed a Compendium of Published Wound Healing Studies on Genetically Modified Mice which is available at http://icbxs.ethz.ch/members/grose/woundtransgenic/home.html. 相似文献
8.
Complex Formation Facilitates Endocytosis of the Varicella-Zoster Virus gE:gI Fc Receptor 总被引:11,自引:10,他引:1
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Open reading frames within the unique short segment of alphaherpesvirus genomes participate in egress and cell-to-cell spread. The case of varicella-zoster virus (VZV) is of particular interest not only because the virus is highly cell associated but also because its most prominent cell surface protein, gE, bears semblance to the mammalian Fc receptor FcγRII. A previous study demonstrated that when expressed alone in cells, VZV gE was endocytosed from the cell surface through a tyrosine localization motif in its cytoplasmic tail (J. K. Olson and C. Grose, J. Virol. 71:4042–4054, 1997). Since VZV gE is normally found in association with gI in the infected cell, the present study was directed at defining the trafficking of the VZV gE:gI protein complex. First, VZV gI underwent endocytosis and recycling when it was expressed alone in cells, and interestingly, VZV gI contained a methionine-leucine internalization motif in its cytoplasmic tail. Second, VZV gI was found by confocal microscopy to colocalize with VZV gE during endocytosis and recycling in cells. Third, by a quantitative internalization assay, VZV gE:gI was shown to undergo endocytosis more efficiently (steady state, 55 to 60%) than either gE alone (steady state, ~32%) or gI alone (steady state, ~45%). Further, examination of endocytosis-deficient mutant proteins demonstrated that VZV gI exerted a more pronounced effect than gE on internalization of the complex. Most importantly, therefore, these studies suggest that VZV gI behaves as an accessory component by facilitating the endocytosis of the major constituent gE and thereby modulating the trafficking of the entire cell surface gE:gI Fc receptor complex. 相似文献
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Julianne H. Grose Kelsey Langston Xiaohui Wang Shayne Squires Soumyajit Banerjee Mustafi Whitney Hayes Jonathan Neubert Susan K. Fischer Matthew Fasano Gina Moore Saunders Qiang Dai Elisabeth Christians E. Douglas Lewandowski Peipei Ping Ivor J. Benjamin 《PloS one》2015,10(10)
Small Heat Shock Proteins (sHSPs) are molecular chaperones that transiently interact with other proteins, thereby assisting with quality control of proper protein folding and/or degradation. They are also recruited to protect cells from a variety of stresses in response to extreme heat, heavy metals, and oxidative-reductive stress. Although ten human sHSPs have been identified, their likely diverse biological functions remain an enigma in health and disease, and much less is known about non-redundant roles in selective cells and tissues. Herein, we set out to comprehensively characterize the cardiac-restricted Heat Shock Protein B-2 (HspB2), which exhibited ischemic cardioprotection in transgenic overexpressing mice including reduced infarct size and maintenance of ATP levels. Global yeast two-hybrid analysis using HspB2 (bait) and a human cardiac library (prey) coupled with co-immunoprecipitation studies for mitochondrial target validation revealed the first HspB2 “cardiac interactome” to contain many myofibril and mitochondrial-binding partners consistent with the overexpression phenotype. This interactome has been submitted to the Biological General Repository for Interaction Datasets (BioGRID). A related sHSP chaperone HspB5 had only partially overlapping binding partners, supporting specificity of the interactome as well as non-redundant roles reported for these sHSPs. Evidence that the cardiac yeast two-hybrid HspB2 interactome targets resident mitochondrial client proteins is consistent with the role of HspB2 in maintaining ATP levels and suggests new chaperone-dependent functions for metabolic homeostasis. One of the HspB2 targets, glyceraldehyde 3-phosphate dehydrogenase (GAPDH), has reported roles in HspB2 associated phenotypes including cardiac ATP production, mitochondrial function, and apoptosis, and was validated as a potential client protein of HspB2 through chaperone assays. From the clientele and phenotypes identified herein, it is tempting to speculate that small molecule activators of HspB2 might be deployed to mitigate mitochondrial related diseases such as cardiomyopathy and neurodegenerative disease. 相似文献
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