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لیزوزیم یک مولکول کلیدی در سیستم ایمنی غیر اختصاصی است و ویژگی های آنتی باکتریال بالایی دارد. این آنزیم در سیستم دفاعی بسیاری از گونه ها، نقش اساسی در انهدام و سرکوب گونه های بیماری زای باکتریایی و میکروارگانیسمهای عفونی دارد. توانایی لیزوزیم در هیدرولیز پیوند گلیکوزیدی دیواره سلولی باکتری، آن را یک مولکول مهم دفاعی ساخته است. لیزوزیم یک آنزیم شناخته شده در بیشتر ارگانیسمها و بافتهای دارای فعال...
Three closely related forms of glycogen synthase kinase 3 (GSK-3alpha, GSK-3beta and GSK-3beta2) have a major role in Wnt and Hedgehog signaling pathways and regulate the cell-division cycle, stem-cell renewal and differentiation, apoptosis, circadian rhythm, transcription and insulin action. A large body of evidence supports speculation that pharmacological inhibitors of GSK-3 could be used to...
BACKGROUND Inhibition of glycogen synthase kinase 3β (GSK-3β) has been reported to be cardioprotective during stressful conditions. METHODS AND RESULTS Pigs were fed a high-fat diet for 4 weeks to develop metabolic syndrome, then underwent placement of an ameroid constrictor to their left circumflex artery to induce chronic myocardial ischemia. Two weeks later, animals received either: no dru...
We previously demonstrated that cadmium (Cd) is able to induce autophagic cell death through a calcium-extracellular signal-regulated kinase pathway. Here, the object of this study is to investigate the role of glycogen synthase kinase-3beta (GSK-3beta) in the induction of autophagy. After treatment with Cd, MES-13 mesangial cells were determined to have undergone autophagy based on the formati...
Aberrant mitochondrial function appears to play a central role in dopaminergic neuronal loss in Parkinson's disease (PD). 1-methyl-4-phenylpyridinium iodide (MPP(+)), the active metabolite of N-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP), is a selective inhibitor of mitochondrial complex I and is widely used in rodent and cell models to elicit neurochemical alterations associated with PD....
Glycogen synthase kinase (GSK)-3β is a multifunctional protein that has been implicated in the pathological characteristics of Alzheimer's disease (AD), including the heightened levels of neurofibrillary tangles, amyloid-beta (Aβ), and neurodegeneration. In this study we used 12-month-old SAMP8 mice, an AD model, to examine the effects GSK-3β may cause regarding the cognitive impairment and oxi...
تعداد 436 نمونه مشکوک به آلودگی ویروسی در طول ماه های اسفند 89 و فروردین 90 از مزارع کلزا جمعآوری و با آزمون الایزا و آنتی سرمهای اختصاصی tumv، tcv و tymv مورد سنجش قرار گرفت که از میان آن ها 117 نمونه به tumv و هفت نمونه به tcv آلودگی داشتند. خالص سازی بیولوژیکی یکی از نمونههای آلوده (جدایه گوارشک) انجام شد و پس از استخراج rnaی کل گیاه، ژن پوشش پروتئینی ویروس با آزمون rt-pcr تکثیر (bp 986) ...
Curcumin has been reported to inhibit the generation of Aβ, but the underlying mechanisms by which this occurs remain unknown. Aβ is thought to play an important role in the pathogenesis of Alzheimer's disease (AD). The amyloid hypothesis argues that aggregates of Aβ trigger a complex pathological cascade that leads to neurodegeneration. Aβ is generated by the processing of APP (amyloid precurs...
BACKGROUND Neuropathic pain and sensory abnormalities are a debilitating secondary consequence of spinal cord injury (SCI). Maladaptive structural plasticity is gaining recognition for its role in contributing to the development of post SCI pain syndromes. We previously demonstrated that excitotoxic induced SCI dysesthesias are associated with enhanced dorsal root ganglia (DRG) neuronal outgrow...
INTRODUCTION The function of Glycogen Synthase Kinases 3β (GSK-3β) has previously been shown to be necessary for normal secondary palate development. Using GSK-3ß null mouse embryos, we examine the potential coordinate roles of Wnt and Hedgehog signaling on palatal ossification. METHODS Palates were harvested from GSK-3β, embryonic days 15.0-18.5 (e15.0-e18.5), and e15.5 Indian Hedgehog (Ihh)...
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