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垂直传播中乙型肝炎病毒S区变异株检出及其流行病学意义 |
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王珊珊 姜普林 彭桂福 曾年华 王志斌
【摘要】 目的 研究垂直传播中乙型肝炎病毒S基因变异的流行病学意义。方法 以配偶无乙型肝炎病毒(HBV)标志的4名女性携带者与6名男性携带者及其子宫内感染HBV的胎儿为对象,以双脱氧链末端终止法检测母子、父子所携HBV S区451~660位核苷酸序列。结果 母子、父子间同源性98%~100%,检出491、494、530、546、581位点变异致使113、114、126、131、143位氨基酸替代,其中2对父母与胎儿检出126位变异。4例胎儿检出131位变异,其中2例胎儿合并检出143位变异。结论 HBV垂直传播中存在S基因变异株,可能以126、131、143位氨基酸变异株为主,这些变异株可能使HB疫苗免疫失败。 【关键词】 乙型肝炎病毒 垂直传播 S基因变异
Detection of S-gene mutation strain in vertical transmission of HBV and its significance
WANG Shanshan,JIANG Pulin,PENG Guifu,et al. Institute for Military Medicine,Guangzhou Command,PLA,Guangzhou 510507
【Abstract】 Objective To study S-gene mutation of hepatitis B virus (HBV) in its vertical transmission and its significance. Methods Nucleotides of S-gene nt451-660 of HBV were sequenced with dideoxy end termination technique in four female and six male carriers without HBV markers in their spouses and in their intrauterine infected fetuses. Results It was showed that homology of HBV nucleotide and amino acid sequences in the mothers, fathers and their fetuses was very high. Mutation at the sites 491,494,530,546 and 581 of S-gene resulted in amino acid substitution at the sites 113,114,126,131 and 143, respectively. Mutations at the sites 126 were detected in two pairs of mother or father and her or his fetuses and mutations at the sites 131 in four fetuses, respectively, including combined mutation at the site 143 in two fetuses. Conclusion Strains with S-gene mutation, mainly at the sites 126,131 and 143, could be found in HBV vertical transmissions, which could cause failure in HB vaccine immunization. 【Key words】 Hepatitis B virus Vertical transmission S-gene mutation
乙型肝炎病毒(HBV)的垂直传播是造成免疫耐受的重要原因[1,2],免疫耐受则是免疫预防失败的主要因素。目前的研究表明垂直传播不仅包括母子传播而且包括父子传播[3],这种传播方式对形成我国人群中的健康携带状况与HBV储存库起重要作用。HBV在两代间的传播同样受到强大的免疫压力,病毒变异是必然的生物学现象。本研究试图检出垂直传播中HBV S区的主要变异株,探讨人群中免疫耐受致使HB疫苗免疫失败可能的原因。
材料及方法
一、研究对象:从[1] [2] [3] 下一页 上一个医学论文: 部队肺结核发病因素的病例对照研究 下一个医学论文: 麻疹 猩红热流行中存在 Z
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