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时间:2018-08-01
《少精不育患者体细胞与精细胞的雄性激素受体基因突变的比较与分析》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、少精不育患者体细胞与精细胞的雄性激素受体基因突变的比较与分析【关键词】基因突变;少精液症;不育;雄激素受体;摘要少精不育患者体细胞与精细胞的雄性激素受体基因突变的比较与分析【关键词】基因突变;少精液症;不育;雄激素受体;摘要目的:了解雄性激素受体基因(Androgen receptor gene)突变对少精不育病症发生所起的作用及突变的来源。方法:利用PCR对45例精液标本和配对的血液标本AR基因8个外显子分别进行扩增。扩增产物经琼脂糖电泳和聚丙烯胺的CDGE电泳分析,检测基因片段的插入和缺失及点突变。结果:45例少精不育患者的精液标本中,外显子A即基因转录激活区发生点突变者3例,插
2、入突变4例,缺失突变3例共10例,占22.2%;外显子H发生缺失突变1例、外显子G处发生点突变1例、外显子E发生完全缺失突变1例、不完全缺失突变1例;同时他们的血液标本中,只有3例在外显子A发生插入突变。结论:雄性激素受体基因外显子A即基因转录激活区的突变是造成少精不育的重要原因。突变一般发生在减数分裂期,少数是亲代遗传。关键词基因突变;少精液症;不育;雄激素受体;Mutations of androgen receptor gene in somatic cell compared with that of spermatoblast in infertile men with o
3、ligospermiaWang Jianxun,Ye Feng,Yuan Hanyao(Department of Center Laboratory,Affiliated Hospital of Guangdong Medical College ,Zhanjiang 524001)Abstract objective:To study what the role is of androgen receptor gene mutation in infertile men with oligospermia,and where the mutations come from.Met
4、hods:Each exon of AR gene was amplified by PCR, with 12 pair primers from 45 patients,and products are separated by agarose and CDGE(constant denatured gel electrophoresis),so that insertion,deletion and point mutation can be detected.Results:The number of mutation in exon A of AR gene from 45
5、sperm specimens is twelve including point mutation 3 cases,insertion mutation 4 cases and deletion mutation 3 cases,the rate of mutation is 26.7%.The cases of mutation from blood specimens are three,andjust located in Exon A.The mutatant rate is 6.7%. Conclusion:Mutation of Exon A in AR gene pl
6、ays a very important part in development of infertile men with oligospermia.Some of them inherited from parents.Key Words:gene mutation;infertile with oligospermia;androgen receptor gene;androgen receptor雄激素受体(AR)的存在是正常男性性征的分化,睾丸的发育和精子产生的必要条件[1]。蛋白质研究表明约40%的不育男人有AR反常现象[3]。AR基因的突变可以导致细胞对睾酮敏感性降低,
7、从而引起46.XY的男性个体表型发育的反常,体现在从完全女性化到部分体征女性化不等。AR变异研究一般表现为四个方面:受体结合区的缺失,受体数量的减少,受体质的异常及受体阳性雄激素抗性[2]。本实是用现代分子生物学技术检测AR基因突变与不育的关系。1材料和方法1.1材料1.1.1标本收集精液标本均来自本院检验科共收集45例,是婚后2~3 a不育的病人,经SQA检测为少精,精子形态正常在45%以下,活率在30%~60%之间。同时抽血一份,分离白细胞,作对比分析
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