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95株耐多药结核分枝杆菌katG基因序列分析 被引量:1

KATG GENE SEQUENCE ANALYSIS OF 95 STRAINS MULTI DRUG RESISTANT TUBERCLE BACILLUS
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摘要 目的分析广州地区耐多药结核分枝杆菌katG基因突变的分子特征。方法应用PCR-测序法对来自广州地区100株耐多药结核分枝杆菌株katG基因的261~330位密码子长度约210 bp目的片段进行序列测定,并与结核分枝杆菌标准株H37Rv菌株katG基因序列(GenBank:X68081.1,1-4810)进行对比,并应用DNASTAR软件推测氨基酸突变情况。在PCR和基因序列测定中,引物设计相同,上、下游引物分别为5'-GAAACAGCGGCGCTGATCGT-3和5'-GTTGTC-CCATTTCGTCGGGG-3'。结果 100株耐多药结核分枝杆菌菌株中,95株成功扩增出katG基因,95株中有70株呈现katG基因突变(73.68%);基因突变类型均为点突变,突变均发生于315位点,未见插入或缺失型基因突变;氨基酸突变包括3种类型,其中:66株发生AGC(Ser)→ACC(Thr)突变即S315T(94.28%),2株发生AGC(Ser)→ATC(Ile)突变即S315I(2.86%),2株发生AGC(Ser)→AAC(Asn)突变即S315N(2.86%)。结论在所测菌株范围内,广州地区耐多药结核分枝杆菌katG基因突变率和突变类型具有其特点。
机构地区 广州市胸科医院
出处 《现代医院》 2012年第8期15-16,共2页 Modern Hospitals
基金 国家"十一五"重大传染病专项资助项目(编号2008ZX10003-007) 广东省医学科研基金立项资助课题(编号A2012518) 广州市医药卫生科技重大项目(编号2009-ZDa-03) 广州市医药卫生科技重点项目(2009-ZDi-22)
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参考文献10

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