目的探讨食管鳞癌组织中microRNA let-7a-3甲基化状态与血浆中类胰岛素样生长因子2(Insulin like growth factor 2,IGF-Ⅱ)表达的相关性。方法采用甲基化特异性PCR法(Methylation specific PCR,qMSP)检测83例食管癌及相对应的癌旁正常...目的探讨食管鳞癌组织中microRNA let-7a-3甲基化状态与血浆中类胰岛素样生长因子2(Insulin like growth factor 2,IGF-Ⅱ)表达的相关性。方法采用甲基化特异性PCR法(Methylation specific PCR,qMSP)检测83例食管癌及相对应的癌旁正常组织中let-7a-3甲基化状态,采用酶联免疫吸附试验(Enzyme linked immunosorbent assay,ELISA)检测血浆中IGF-Ⅱ的表达水平。结果83例食管鳞癌患者癌组织中的microRNA let-7a-3甲基化程度显著高于癌旁正常组织(P<0.001)。83例食管鳞癌患者血浆中IGF-Ⅱ的表达水平与let-7a-3基因的甲基化程度总体上呈正相关,具有统计学意义(r=0.600,P<0.001)。结论microRNA let-7a-3可能通过对下游分子的甲基化调控参与食管鳞癌的发生发展,这对了解食管鳞癌形成的机制具有重要意义,可为食管鳞癌的诊断和预后提供依据。展开更多
BACKGROUND Primary sclerosing cholangitis(PSC)is characterized by chronic inflammation and it predisposes to cholangiocarcinoma due to lack of effective treatment options.Recombinant adeno-associated virus(rAAV)provid...BACKGROUND Primary sclerosing cholangitis(PSC)is characterized by chronic inflammation and it predisposes to cholangiocarcinoma due to lack of effective treatment options.Recombinant adeno-associated virus(rAAV)provides a promising platform for gene therapy on such kinds of diseases.A microRNA(miRNA)let-7a has been reported to be associated with the progress of PSC but the potential therapeutic implication of inhibition of let-7a on PSC has not been evaluated.AIM To investigate the therapeutic effects of inhibition of a miRNA let-7a transferred by recombinant adeno-associated virus 8(rAAV8)on a xenobiotic-induced mouse model of sclerosing cholangitis.METHODS A xenobiotic-induced mouse model of sclerosing cholangitis was induced by 0.1% 3,5-Diethoxycarbonyl-1,4-Dihydrocollidine(DDC)feeding for 2 wk or 6 wk.A single dose of rAAV8-mediated anti-let-7a-5p sponges or scramble control was injected in vivo into mice onset of DDC feeding.Upon sacrifice,the liver and the serum were collected from each mouse.The hepatobiliary injuries,hepatic inflammation and fibrosis were evaluated.The targets of let-7a-5p and downstream molecule NF-κB were detected using Western blot.RESULTS rAAV8-mediated anti-let-7a-5p sponges can depress the expression of let-7a-5p in mice after DDC feeding for 2 wk or 6 wk.The reduced expression of let-7a-5p can alleviate hepato-biliary injuries indicated by serum markers,and prevent the proliferation of cholangiocytes and biliary fibrosis.Furthermore,inhibition of let-7a mediated by rAAV8 can increase the expression of potential target molecules such as suppressor of cytokine signaling 1 and Dectin1,which consequently inhibit of NF-κB-mediated hepatic inflammation.CONCLUSION Our study demonstrates that a rAAV8 vector designed for liver-specific inhibition of let-7a-5p can potently ameliorate symptoms in a xenobiotic-induced mouse model of sclerosing cholangitis,which provides a possible clinical translation of PSC of human.展开更多
目的:通过检测急性髓系白血病(AML)患者骨髓单个核细胞(BMMNC)中let-7a-3基因的表达水平,探讨其与临床变量的相关性。方法:应用RQ-PCR方法检测83例初诊AML患者BMMNC中let-7a-3基因表达水平,分析其与患者年龄、性别、血象、诊断分型和7...目的:通过检测急性髓系白血病(AML)患者骨髓单个核细胞(BMMNC)中let-7a-3基因的表达水平,探讨其与临床变量的相关性。方法:应用RQ-PCR方法检测83例初诊AML患者BMMNC中let-7a-3基因表达水平,分析其与患者年龄、性别、血象、诊断分型和7个基因(FLT3-ITD,NPM1,C-KIT,IDH1/IDH2,DNMT3A,C/EBPA and N/K-RAS)突变的关系。结果:20例(24%)AML患者存在着let-7a-3转录本的过表达;let-7a-3基因过表达阳性组与阴性组在年龄、性别、血象、FAB亚型和突变基因之间均无显著性差异(P>0.05);let-7a-3基因过表达阳性组与阴性组的总体生存(OS)时间并无显著差异(P>0.05),但在治疗后获得完全缓解的患者中let-7a-3基因过表达阳性组与阴性组的总体生存时间差异有显著性(P=0.003)。结论:let-7a-3基因过表达是AML中的一个常见分子事件。展开更多
基金Supported by the National Natural Science Foundation of China,No.82172297Natural Science Foundation of Jiangsu Province of China,No.BK20211346 and No.BK20201011+1 种基金Natural Science Foundation of Jiangsu Higher Education Institutions of China,No.22KJA310007Xuzhou Science and Technology Project,No.KC22055.
文摘BACKGROUND Primary sclerosing cholangitis(PSC)is characterized by chronic inflammation and it predisposes to cholangiocarcinoma due to lack of effective treatment options.Recombinant adeno-associated virus(rAAV)provides a promising platform for gene therapy on such kinds of diseases.A microRNA(miRNA)let-7a has been reported to be associated with the progress of PSC but the potential therapeutic implication of inhibition of let-7a on PSC has not been evaluated.AIM To investigate the therapeutic effects of inhibition of a miRNA let-7a transferred by recombinant adeno-associated virus 8(rAAV8)on a xenobiotic-induced mouse model of sclerosing cholangitis.METHODS A xenobiotic-induced mouse model of sclerosing cholangitis was induced by 0.1% 3,5-Diethoxycarbonyl-1,4-Dihydrocollidine(DDC)feeding for 2 wk or 6 wk.A single dose of rAAV8-mediated anti-let-7a-5p sponges or scramble control was injected in vivo into mice onset of DDC feeding.Upon sacrifice,the liver and the serum were collected from each mouse.The hepatobiliary injuries,hepatic inflammation and fibrosis were evaluated.The targets of let-7a-5p and downstream molecule NF-κB were detected using Western blot.RESULTS rAAV8-mediated anti-let-7a-5p sponges can depress the expression of let-7a-5p in mice after DDC feeding for 2 wk or 6 wk.The reduced expression of let-7a-5p can alleviate hepato-biliary injuries indicated by serum markers,and prevent the proliferation of cholangiocytes and biliary fibrosis.Furthermore,inhibition of let-7a mediated by rAAV8 can increase the expression of potential target molecules such as suppressor of cytokine signaling 1 and Dectin1,which consequently inhibit of NF-κB-mediated hepatic inflammation.CONCLUSION Our study demonstrates that a rAAV8 vector designed for liver-specific inhibition of let-7a-5p can potently ameliorate symptoms in a xenobiotic-induced mouse model of sclerosing cholangitis,which provides a possible clinical translation of PSC of human.
文摘目的:通过检测急性髓系白血病(AML)患者骨髓单个核细胞(BMMNC)中let-7a-3基因的表达水平,探讨其与临床变量的相关性。方法:应用RQ-PCR方法检测83例初诊AML患者BMMNC中let-7a-3基因表达水平,分析其与患者年龄、性别、血象、诊断分型和7个基因(FLT3-ITD,NPM1,C-KIT,IDH1/IDH2,DNMT3A,C/EBPA and N/K-RAS)突变的关系。结果:20例(24%)AML患者存在着let-7a-3转录本的过表达;let-7a-3基因过表达阳性组与阴性组在年龄、性别、血象、FAB亚型和突变基因之间均无显著性差异(P>0.05);let-7a-3基因过表达阳性组与阴性组的总体生存(OS)时间并无显著差异(P>0.05),但在治疗后获得完全缓解的患者中let-7a-3基因过表达阳性组与阴性组的总体生存时间差异有显著性(P=0.003)。结论:let-7a-3基因过表达是AML中的一个常见分子事件。
