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51.
Harvey Hilliard 《BMJ (Clinical research ed.)》1911,2(2660):1676-1677
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A report on the 16th International Caenorhabditis elegans Meeting, Los Angeles, USA, 27 June-1 July 2007. 相似文献
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Translational regulation of autoimmune inflammation and lymphoma genesis by programmed cell death 4 总被引:1,自引:0,他引:1
Hilliard A Hilliard B Zheng SJ Sun H Miwa T Song W Göke R Chen YH 《Journal of immunology (Baltimore, Md. : 1950)》2006,177(11):8095-8102
Both inflammatory diseases and cancer are associated with heightened protein translation. However, the mechanisms of translational regulation and the roles of translation factors in these diseases are not clear. Programmed cell death 4 (PDCD4) is a newly described inhibitor of protein translation. To determine the roles of PDCD4 in vivo, we generated PDCD4-deficient mice by gene targeting. We report here that mice deficient in PDCD4 develop spontaneous lymphomas and have a significantly reduced life span. Most tumors are of the B lymphoid origin with frequent metastasis to liver and kidney. However, PDCD4-deficient mice are resistant to inflammatory diseases such as autoimmune encephalomyelitis and diabetes. Mechanistic studies reveal that upon activation, PDCD4-deficient lymphocytes preferentially produce cytokines that promote oncogenesis but inhibit inflammation. These results establish that PDCD4 controls lymphoma genesis and autoimmune inflammation by selectively inhibiting protein translation in the immune system. 相似文献
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Massimo A. Hilliard 《Journal of neurochemistry》2009,108(1):23-32
Axonal degeneration is a common hallmark of both nerve injury and many neurodegenerative conditions, including motor neuron disease, glaucoma, and Parkinson's, Alzheimer's, and Huntington's diseases. Degeneration of the axonal compartment is distinct from neuronal cell death, and often precedes or is associated with the appearance of the symptoms of the disease. A complementary process is the regeneration of the axon, which is commonly observed following nerve injury in many invertebrate neurons and in a number of vertebrate neurons of the PNS. Important discoveries, together with innovative imaging techniques, are now paving the way towards a better understanding of the dynamics and molecular mechanisms underlying these two processes. In this study, I will discuss these recent findings, focusing on the balance between axonal degeneration and regeneration. 相似文献
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Protein tyrosine phosphatases are needed for activating maturation promoting factor, meiotic spindle assembly and spindle checkpoint inactivation. The protein phosphatase inhibitor vanadate was used to upset the kinase-phosphatase equilibrium during oocyte maturation (OM) and the metaphase anaphase transition (MAT) prior to cytogenetic analyses of mouse oocytes and bone marrow cells. ICR females received pregnant mare serum gonadotrophin (PMSG) and 48h later received human chorionic gonadotrophin (hCG). Vanadate doses of 0, 5, 15, and 25mg/kg were administered intraperitoneally immediately after hCG and ovulated oocytes and bone marrow cells were processed for cytogenetic analyses 18h after hCG. Data were analyzed by Chi-square and Fisher's exact tests. Vanadate induced different cytogenetic abnormalities in oocytes and in bone marrow cells. The frequencies of oocytes exhibiting premature anaphase (spontaneous activation) in vanadate exposed mice were significantly (P<0.01) elevated over controls; whereas, in bone marrow cells, the levels of tetraploidy, hyperploidy and premature centromere separation were significantly (P<0.01) increased by vanadate treatment. These results suggest that alteration of the kinase-phosphatase equilibrium during OM and the MAT leads to cytogenetic abnormalities that differ between oocytes and bone marrow cells. 相似文献
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