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风湿性二尖瓣狭窄心房颤动患者HCN4基因cDNA序列测定及mRNA的表达 被引量:2

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摘要 目的通过分析风湿性心脏病二尖瓣狭窄患者心房肌组织超级化激活环核苷酸调控通道基因家族4(HCN4)基因表达与心房颤动发生的关系,为探讨心房颤动发生的机制奠定理论基础。方法52例风湿性二尖瓣狭窄患者,根据是否合并心房颤动将其分为两组,实验组:38例,男18例,女20例;年龄26~68岁,平均年龄46.47岁;均合并心房颤动。对照组:14例,男6例,女8例;年龄21~62岁,平均年龄42.93岁;不合并心房颤动。提取并逆转录两组患者心房肌组织中HCN4基因的总核糖核酸(RNA),应用SYBR GreenⅠ荧光染料,建立检测HCN4基因信使RNA(mRNA)的实时荧光定量聚合酶链反应(PCR)法,并对PCR产物测序进行分析。根据标准曲线计算出两组心房肌组织中HCN4基因mRNA含量,并以HCN4基因mRNA和内参β肌动蛋白(β-actin)含量的比值作为评价HCN4基因mRNA表达水平指标。结果测定HCN4基因cDNA序列同源性为100%。建立的实时荧光定量PCR方法在103~107拷贝数/μl的标准品梯度稀释范围内r为0.999。实验组HCN4基因mRNA与β-actin含量的相对表达值比值与对照组比较明显升高(1.323±1.226 vs.0.116±0.192,P<0.05)。结论实时荧光定量PCR对HCN4基因mRNA能进行准确定量,HCN4基因的过度转录表达提示其可能参与了调控风湿性二尖瓣狭窄心房颤动的发生过程。
出处 《中国胸心血管外科临床杂志》 CAS 2010年第2期171-173,共3页 Chinese Journal of Clinical Thoracic and Cardiovascular Surgery
基金 广西科学基金资助项目(0816004-24) 广西研究生教育创新计划资助项目(2008105981002M199)
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