简介:AbstractGastric cancer (GC) is a common malignancy and is the third leading cause of cancer-related death. At present, there is no simple and effective screening method for early-stage GC, and the treatment results and prognosis are poor. With the continuous improvement of molecular biology techniques, research on circular RNA (circRNA) has gradually expanded over time. Much data supports the role of circRNA in tumorigenesis. Moreover, due to its structural specificity and biological stability, circRNA is anticipated to be a potential biomarker for tumor diagnosis. Studies have confirmed that circRNA can participate in the proliferation, invasion, metastasis, and apoptosis of GC. These findings will lead to novel directions for the diagnosis and treatment of GC. This article reviews the structure and function of circRNA, summarizes the current studies on circRNA, and discusses the potential diagnostic value of circRNA in GC.
简介:摘要乙型肝炎病毒(HBV)是一种DNA病毒,慢性乙型病毒性肝炎可进展至肝硬化及肝癌。载脂蛋白B信使RNA编辑酶催化多肽3G(APOBEC3G)是一种显性胞苷脱氨酶,APOBEC3G HBV DNA正链的1 200~2 000 nt区域诱导HBV DNA突变,基因多态性Rs8177832可增强APOBEC3G对HBV的抑制作用,促进乙型肝炎e抗原(HBeAg)的血清转化。而HBV x蛋白(HBx)选择性、特异性下调细胞内APOBEC3G蛋白水平。本文就APOBEC3G抗乙型肝炎的研究机制作一综述。
简介:摘要目的观察肝细胞癌患者血清中微小RNA(miRNA,miR)-432、微小RNA-432(miR-30b)及微小RNA-432(miR-764)水平。方法选取安徽医科大学第三附属医院2015年1月30日至2018年1月30日收治的150例肝细胞癌患者,同时选取150例年龄匹配的体检结果健康者作为对照组,采用实时荧光定量聚合酶链反应(PCR)法检测研究对象外周血中miR-432、miR-30b及miR-764表达水平。观察miR-432、miR-30b及miR-764与肝细胞癌患者临床病理因素的相关性,并对肝细胞癌患者进行随访,观察miR-432、miR-30b及miR-764与患者总生存期(OS)的相关性。采用独立样本t检验及Log-rank检验。结果肝细胞癌患者外周血中miR-432(2.11±0.71)、miR-30b(1.88±0.68)及miR-764(1.90±0.65)水平均较对照组高(1.12±0.40、1.01±0.38、0.99±0.35,t=4.879、13.679、15.097,P<0.01)。miR-432、miR-764表达量与肝细胞癌TNM分期有相关(P<0.05),miR-30b与肝细胞癌TNM分期及分化程度有相关(P<0.05)。Kaplan-Meier法及Log-rank检验显示,miR-432、miR-30b及miR-764表达量升高组OS短于降低组(Log-rank χ2=16.433、10.575、7.998,P<0.05)。Cox多因素分析均显示,TNM分期、miR-432、miR-30b、miR-764、肿瘤分化程度是肝细胞癌OS的独立影响因素[比值比(OR)=2.904、2.135、1.651、1.496、1.205,P<0.05]。结论肝细胞癌患者循环中miR-432、miR-30b及miR-764表达上调,且与患者总生存率降低密切相关。