青壮年不明原因夜间睡眠中猝死SCN5A基因型研究  

Genotype of SCN5A Gene in Sudden Manhood Death Syndrome

作　　者：侯一丁[1] 刘超[2] 唐双柏[1] 李越[2] 刘长晖[2] 成建定[1] 

机构地区：[1]中山大学中山医学院法医病理学教研室,广东广州510080 [2]广州市刑事科学技术研究所,广东广州510030

出　　处：《中山大学学报（医学科学版）》2013年第1期124-130,共7页Journal of Sun Yat-Sen University:Medical Sciences

基　　金：国家自然科学基金(30973367;81172901);"十二五"科技支撑计划项目(2012BAK02B02);中央高校基本科研业务费专项资金(11ykpy04);教育部留学回国人员科研启动基金(44);广东省自然科学基金(S2012010009045)

摘　　要：【目的】研究中国汉族人群青壮年不明原因夜间睡眠中猝死(SMDS)病例的SCN5A基因型特征。【方法】选取120例中国汉族人群散发SMDS病例,提取其基因组DNA,对PCR产物(包含编码区及外显子-内含子拼接区)进行直接测序。鉴定基因内的遗传变异,以相同人群健康组作对照。【结果】120例SMDS散发病例中共发现SCN5A的11个突变位点,其中,Y1434Y、L1566L为编码区同义突变,V95I、R121Q、R367H、R1512W为已报道的错义突变,R513H、D870H、V1202M、V1764D、S1937F为本研究新发现的错义突变。【结论】首次较全面地获得了中国人SMDS病例SCN5A基因型特征,丰富了SMDS的分子病理学数据库,同时,为进一步探索心脏钠离子通道功能异常与SMDS发病机制的相关性提供了新的信息。[Objective ] This study sought to investigate the genotype of SCN5A gene in Chinese Han population with sudden manhood death syndrome （SMDS）. [Methods] Genomic DNA was extracted from 120 SMDS sporadic cases. PCR products spanning the entire coding region and splice junctions of the gene were sequenced. Controls from the same population were then screened for the presence of mutations identified in cases. [Results] Eleven distinct mutations were identified, of which 2（YI434Y, L1566L） were synonymous coding mutations, 9 were missense mutations. Among the missense mutations, V95I, R121Q, R367H, and R1512W were repotted while R513H, D870H, V1202M, V1764D and S1937F were novel. [Conclusions] Our results firstly provide comprehensive genotype features of SCN5A gene in Chinese Han population with SMDS, which expands the spectrum of molecular pathology database associated with SMDS and provides new data for understanding the correlation between cardiac sodium channel dysfunction and the mechanisms of SMDS.

关 键 词：青壮年不明原因夜间睡眠中猝死 SCN5A基因 突变 

分 类 号：R541[医药卫生—心血管疾病]