維吾爾族不同齲敏感兒童變形鏈球菌臨床分離株表面蛋白A區(qū)遺傳多態(tài)性研究
發(fā)布時間:2018-08-14 15:45
【摘要】:目的:分析維吾爾族高齲和無齲兒童變形鏈球菌臨床分離株表面蛋白A區(qū)基因遺傳多態(tài)性與其黏附能力的關(guān)系。方法:通過細(xì)菌貼壁法進(jìn)行維吾爾族兒童高齲組(dmft≥5)和無齲組(dmft=0)變鏈菌臨床株黏附試驗。選取黏附能力較強和較弱的菌株,提取細(xì)菌DNA,經(jīng)PCR擴增其表面蛋白A區(qū)編碼基因spaP-a后,利用限制性內(nèi)切酶HaeⅢ進(jìn)行限制性片段長度多態(tài)性分析。結(jié)果:高齲組黏附能力(33.92±8.79)%強于無齲組(27.53±7.45)%,差異有統(tǒng)計學(xué)意義(P0.05)。經(jīng)HaeⅢ酶切后,高黏附力組和低黏附力組變鏈菌均出現(xiàn)了A、B兩種基因型,且在兩組菌株中的分布情況不同,A基因型在高黏附力組居多,B基因型在低黏附力組居多,差異有統(tǒng)計學(xué)意義(P0.05)。測序證實spaP-a基因的特異性堿基突變引起酶切位點改變而產(chǎn)生基因多態(tài)性。結(jié)論:維吾爾族不同齲敏感兒童變鏈菌臨床株spaP-a基因具有得遺傳多態(tài)性可能是其黏附能力出現(xiàn)差異的原因之一。
[Abstract]:Objective: to analyze the relationship between genetic polymorphism of surface protein A region and adhesion ability of Streptococcus mutans in Uygur children with high caries and no caries. Methods: the adherence test of clinical strains of Streptococcus mutans in Uygur children with high caries (dmft 鈮,
本文編號:2183351
[Abstract]:Objective: to analyze the relationship between genetic polymorphism of surface protein A region and adhesion ability of Streptococcus mutans in Uygur children with high caries and no caries. Methods: the adherence test of clinical strains of Streptococcus mutans in Uygur children with high caries (dmft 鈮,
本文編號:2183351
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