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首页> 外文期刊>The FEBS journal >The transcription factor ZBP-89 suppresses p16 expression through a histone modification mechanism to affect cell senescence
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The transcription factor ZBP-89 suppresses p16 expression through a histone modification mechanism to affect cell senescence

机译:转录因子ZBP-89通过组蛋白修饰机制抑制p16表达,影响细胞衰老

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The transcription factor ZBP-89 has been implicated in the induction of growth arrest and apoptosis. In this article, we demonstrate that ZBP-89 was able to restrain senescence in NCI-H460 human lung cancer cells, through epigenetically regulating p16INKta expression. Specifically, our results indicate that knockdown of ZBP-89 by RNA interference stimulated cellular senescence in NCI-H460 cells, as judged by the senescence-associated o-galactosidase activity assay and senescence-associated heterochromatin foci assay, and this process could be reversed by RNA interference-mediated p16INKta silencing. We also show that histone deacetylase (HDAC) 3 and HDAC4 inhibited p16INKta promoter activity in a dose-dependent manner. Furthermore, chromatin immunoprecipitation assays verified that HDAC3 was recruited to the p16INKta promoter by ZBP-89 through an epigenetic mechanism involving histone acetylation modification. Moreover, immunofluorescence and coimmunoprecipitation assays revealed that ZBP-89 and HDAC3 formed a complex. These data suggest that ZBP-89 and HDAC3, but not HDAC4, can work coordinately to restrain cell senescence by downregulating p16INKta expression through an epigenetic modification of histones. Structured digital abstract MINT-7144512: HDAC4 (uniprotkb: P56524) physically interacts ( MI:0914) with ZBP-89 (uniprotkb: Q9UQR1) by anti tag coimmunoprecipitation ( MI:0007) MINT-7144482, MINT-7144499: ZBP-89 (uniprotkb: Q9UQR1) physically interacts ( MI:0914) with HDAC3 (uniprotkb: O15379) by anti tag coimmunoprecipitation ( MI:0007) MINT-7144469: ZBP-89 (uniprotkb: Q9UQR1) and HDAC3 (uniprotkb: O15379) colocalize ( MI:0403) by fluorescence microscopy ( MI:0416)
机译:转录因子ZBP-89与诱导生长停滞和凋亡有关。在本文中,我们证明ZBP-89通过表观遗传调控p16INKta表达能够抑制NCI-H460人肺癌细胞的衰老。具体而言,我们的结果表明,通过衰老相关的o-半乳糖苷酶活性检测和衰老相关的异染色质病灶检测可以判断,RNA干扰导致的ZBP-89敲低刺激了NCI-H460细胞的细胞衰老,这一过程可以通过逆转RNA干扰介导的p16INKta沉默。我们还显示,组蛋白脱乙酰基酶(HDAC)3和HDAC4以剂量依赖的方式抑制p16INKta启动子活性。此外,染色质免疫沉淀试验证实,HDAC3通过涉及组蛋白乙酰化修饰的表观遗传机制被ZBP-89募集到p16INKta启动子上。此外,免疫荧光和共免疫沉淀试验表明ZBP-89和HDAC3形成了复合物。这些数据表明,ZBP-89和HDAC3,而不是HDAC4,可以通过组蛋白的表观遗传修饰下调p16INKta表达,从而协同抑制细胞衰老。结构化数字摘要MINT-7144512:HDAC4(uniprotkb:P56524)通过抗标签共免疫沉淀(MI:0007)与ZBP-89(uniprotkb:Q9UQR1)物理相互作用(MI:0914)MINT-7144482,MINT-7144499:ZBP-89( uniprotkb:Q9UQR1)通过抗标签共免疫沉淀(MI:0007)MINT-7144469:ZBP-89(uniprotkb:Q9UQR1)和HDAC3(uniprotkb:O15379)与HDAC3(uniprotkb:O15379)物理相互作用(MI:0914)与HDAC3(uniprotkb:O15379)共定位(MI: 0403)通过荧光显微镜(MI:0416)

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