热休克蛋白gp96 3′UTR作为ceRNA通过 miR-642a调控DOHH的表达
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安徽大学生命科学学院,中国科学院微生物研究所病原微生物与免疫学重点实验室,中国科学院微生物研究所病原微生物与免疫学重点实验室,中国科学院微生物研究所病原微生物与免疫学重点实验室,中国科学院微生物研究所病原微生物与免疫学重点实验室

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国家自然科学基金 (31230026, 81321063, 81471960, 81402840), 江苏省自然科学青年基金(BK20130495)和深圳市科技创新委员会基金(JSGG20140516112337659, CYZZ20130826112642412)资助项目


Heat Shock Protein gp96 3′UTR Functions as A ceRNA in Promoting DOHH Expression via miR-642a
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School of Life Sciences, Anhui University,Microbiology and Immunology, Institute of Microbiology, The Chinese Academy of Sciences,Microbiology and Immunology, Institute of Microbiology, The Chinese Academy of Sciences,Microbiology and Immunology, Institute of Microbiology, The Chinese Academy of Sciences,Microbiology and Immunology, Institute of Microbiology, The Chinese Academy of Sciences

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This work was supported by grants from The National Natural Science Foundation of China (31230026, 81321063, 81471960, 81402840), Natural Science Foundation of Jiangsu Province, China (BK20130495), and Shenzhen Science and Technology Innovation Committee (JSGG20140516112337659, CYZZ20130826112642412)

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    摘要:

    热休克蛋白gp96在肝脏等多种肿瘤中过量表达,与肿瘤的恶性程度和患者不良预后呈显著相关性,其在肿瘤发生发展中作用机制有待深入探讨.通过生物信息学技术预测、荧光素酶报告基因检测、免疫印迹分析、实时定量PCR、RNA干扰,研究gp96 3′UTR作为ceRNA(competing endogenous RNA)对miR-642a和脱氧羟腐氨酸羟化酶(deoxyhypusine hydroxylase,DOHH)表达的影响.研究结果显示,miR-642a特异性靶向的野生型gp96 3′UTR,而不是miR-642a结合位点突变的gp96 3′UTR,可吸附下调miR-642a并同时上调miR-642a靶基因DOHH的表达,进一步研究发现gp96 3′UTR对DOHH的调控依赖于miR-642a.实验还发现DOHH并不影响gp96的表达.Gp96通过ceRNA 上调DOHH的表达,为研究gp96促进肝癌等肿瘤的发生发展提供了新思路.

    Abstract:

    Heat shock protein gp96 is overexpressed in many kinds of tumors including hepatic tumors, and its overexpression is significantly correlated with tumor malignant degree and poor prognosis in patients. The mechanisms of heat shock protein gp96 in the development of tumors need to be further investigated. The effects of gp96 3′UTR as a ceRNA (competing endogenous RNA) on miR-642a and DOHH expression was studied through bioinformatics prediction, luciferase reporter assay, Western blotting, real-time PCR, RNA interference. MiR-642a specifically targets gp96 3′UTR. The wild type but not the mutant gp96 3′UTR in miR-642a binding site could sequester and downregulate miR-642a levels, which led to increased expression of the miR-642a target DOHH. Further studies showed that regulation of DOHH expression by gp96 3′UTR was miR-642a dependent. It was also found that DOHH does not affect the expression of gp96. Heat shock protein gp96 promotes DOHH expression via its 3′UTR as a ceRNA, providing new insights into the role of gp96 on the development of hepatic tumors and other tumors.

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盛春海,孙璐,初骁宇,李长菲,孟颂东.热休克蛋白gp96 3′UTR作为ceRNA通过 miR-642a调控DOHH的表达[J].生物化学与生物物理进展,2016,43(10):990-996

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历史
  • 收稿日期:2016-03-18
  • 最后修改日期:2016-09-30
  • 接受日期:2016-10-10
  • 在线发布日期: 2016-10-24
  • 出版日期: 2016-10-20