نتایج جستجو برای: p27kip1
تعداد نتایج: 1558 فیلتر نتایج به سال:
The liver X receptors alpha and beta (LXRalpha and LXRbeta) are important regulators of cholesterol homeostasis in liver and macrophages. Synthetic LXR ligands prevent the development of atherosclerosis in murine models; however, the potential functional relevance of LXRs in vascular smooth muscle cells (VSMCs) has not been investigated. In the present study, we demonstrate that LXRs are expres...
How extracellular signals communicate with the cell cycle is poorly understood. In this issue, two papers address this problem by reporting phosphorylation of the cyclin-dependent kinase inhibitor p27Kip1 on a tyrosine residue by nonreceptor tyrosine kinases, which decreases p27 stability. This new mechanism could explain how cells enter the cell cycle from a quiescent state.
سابقه و هدف: در مطالعات مختلف بیان ژنهای کنترل کننده چرخه سلولی (P27 ,P53) و شاخص تکثیر (Ki-67) در کانسر معده نتایج متفاوتی را با سرانجام بیماری و نیز با بعضی از شاخصه های کلینیکوهیستوپاتولوژیک نشان داده است. این مطالعه با هدف یافتن ارتباط بین بیان این مارکرها و شاخصه های هیستوپاتولوژیک در سرطان معده صورت گرفت.مواد و روشها: در این مطالعه تجربی (آزمایشگاهی) بلوکهای پارافینی 58 نمونه گاسترکتوم...
Tadlock, Laura, Yoko Yamagiwa, James Hawker, Carla Marienfeld, and Tushar Patel. Transforming growth factorinhibition of proteasomal activity: a potential mechanism of growth arrest. Am J Physiol Cell Physiol 285: C277–C285, 2003. First published March 19, 2003; 10.1152/ ajpcell.00550.2002.—Although the proteasome plays a critical role in the controlled degradation of proteins involved in cell ...
BACKGROUND The antihyperglycemic drug metformin may have beneficial effects on the prevention and treatment of cancer. Metformin is known to activate AMP-activated protein kinase (AMPK). It has also been shown to inhibit cyclin D1 expression and proliferation of some cultured cancer cells. However, the mechanisms of action by which metformin mediates cell cycle arrest are not completely underst...
p21Waf1 is a downstream effector of p53 and belongs to the Cip1/Kip1 family of cyclin-dependent kinase inhibitors. Thus, it is a potential tumor suppressor gene and likely plays an important role in tumor development. Moreover, reduced expression of p21Waf1 has been reported to have prognostic value in several human malignancies. In this study, we evaluated the prognostic value of p21Waf1 in bl...
Cyclic nucleotides inhibit vascular smooth muscle cell (VSMC) proliferation but the underlying molecular mechanisms are incompletely understood. We studied the role of S-phase kinase-associated protein-2 (Skp2), an F-box protein of SCFSkp2 ubiquitin ligase responsible for polyubiquitylation of and subsequent proteolysis of p27Kip1, a key step leading to cell cycle progression. Skp2 mRNA and pro...
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