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雷公藤甲素通过抑制逆转录病毒HERV-K Np9基因转录诱导人急性T淋巴细胞白血病Jurkat细胞凋亡 被引量:15
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作者 陈将华 郑维威 +2 位作者 姜旭东 陆晓雅 徐荣臻 《南方医科大学学报》 CAS CSCD 北大核心 2015年第5期702-706,共5页
目的探讨雷公藤甲素诱导人急性T淋巴细胞白血病Jurkat细胞凋亡分子机制。方法 MTT检测雷公藤甲素对Jurkat细胞的增殖抑制作用,然后用Origin Pro8计算出IC50。按照0、2、4、8、16 nmol/L浓度雷公藤甲素处理Jurkat细胞48 h,然后用流式细... 目的探讨雷公藤甲素诱导人急性T淋巴细胞白血病Jurkat细胞凋亡分子机制。方法 MTT检测雷公藤甲素对Jurkat细胞的增殖抑制作用,然后用Origin Pro8计算出IC50。按照0、2、4、8、16 nmol/L浓度雷公藤甲素处理Jurkat细胞48 h,然后用流式细胞仪检测细胞凋亡变化。用半定量RT-PCR法检测加药处理后各组Np9基因m RNA的表达水平变化并用Kodak 1D 3.6软件对条带进行定量分析。采用统计软件分析Np9转录抑制与细胞凋亡的相关性。Western Blotting检测Np9下游信号分子c-myc,β-catenin,ERK,AKT和Notch1蛋白的变化。结果雷公藤甲素呈剂量依赖性抑制Jurkat细胞的增殖,其IC50为12.7 nmol/L。雷公藤甲素呈剂量依赖诱导Jurkat细胞凋亡。进一步实验研究结果显示,雷公藤甲素呈剂量依赖方式抑制Jurkat细胞中Np9基因的m RNA的转录水平。经统计分析发现Np9转录抑制与细胞凋亡之间具有显著的相关性(R2=0.907)。Western Blotting方法结果发现雷公藤甲素在抑制Np9 m RNA转录同时伴有其下游信号分子c-myc,β-catenin,ERK,AKT和Notch1蛋白表达水平降低。结论下调HERV-K Np9 m RNA及其下游信号分子c-myc,β-catenin,ERK,AKT和Notch1蛋白水平是雷公藤甲素诱导人急性T淋巴细胞白血病Jurkat细胞凋亡的重要分子机制之一。 展开更多
关键词 雷公藤甲素 急性T淋巴细胞白血病Jurkat细胞 凋亡 herv-k np9基因
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Human Endogenous Retroviruses and Hematological Malignant Tumors
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作者 Tianfu Li Hanping Li +1 位作者 Lin Li Jingyun Li 《Infectious Microbes & Diseases》 2022年第2期56-63,共8页
Human endogenous retrovirus(HERV)gene sequences are remnants of retroviruses that infected the ancestors of humans millions of years ago and were integrated into human chromosomes,accounting for approximately 8%-9%of ... Human endogenous retrovirus(HERV)gene sequences are remnants of retroviruses that infected the ancestors of humans millions of years ago and were integrated into human chromosomes,accounting for approximately 8%-9%of the human genome.Most integrated HERVs have lost their coding capacity and remain silent due to frame shifts,mutations,and sequence deletions or insertions over the millions of years,but their expression is highly regulated by epigenetic and host defense mechanisms.However,there are still some HERV genes that have intact open reading frames due to recent integration into the human genome or positive selective pressure.The abnormal activation of HERVs may contribute to diseases or their pathology,such as malignant tumors,autoimmune diseases,and nervous system diseases.The occurrence and development of hematological malignant tumors(HMTs)is a complex process involving interactions of multiple genetic and environmental factors.The abnormal activation of HERVs may contribute to the pathology of HMTs via indirect mechanisms.In this review,we address the discovery of endogenous retroviruses in vertebrates,and the classification and genomic structure of HERVs.Among HERV family members,HERV-K is the latest type of HERV integrated into the human genome and it has the strongest transcriptional activity.We explore the currently known expression of HERV-K proto-oncogenes in HMTs and further address potential research and therapeutic approaches.However,much remains to be learned about not only the impact of HERVs on the occurrence of HMTs,but also the potential value of HERVs as diagnostic and therapeutic targets for HMTs. 展开更多
关键词 human endogenous retrovirus hematologic malignant tumor np9 gene
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