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先天性巨结肠Pax3和Cx43基因突变及表达 被引量:13

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摘要 目的:探讨Pax3(pairedbox3)和Cx43(connexin43)基因在先天性巨结肠(Hirschsprungs disease,HD)中突变及表达的意义,分析HD与Pax3和Cx43基因异常的关系. 方法:应用半定量逆转录聚合酶链反应(RT-PCR)和银染单链构像多态性(SSCP)方法检测Pax3和Cx43基因突变和mRNA表达情况. 结果:正常人38例肠段对照组织中DNA未发现Cx43 SSCP 异常泳动带,而仅有3例(7.9%)出现Pax3 PCR产物单链异常泳动带;HD38例肠管组织中17例(44.7%)出现Pax3 PCR产物单链异常泳动带,11例(28.9%)出现Cx43 PCR 产物单链异常泳动带.HD各段肠管组织中均有Pax3基因mRNA的表达,痉挛段、移行段和扩张段肠管组织中Pax3 mRNA高表达,表达率分别为92.1%,86.8%和76.3% (mean±SD=1.63±0.37;1.42±0.41和1.25±0.17);而正常肠段组织中Pax3 mRNA无表达,有显著性差异(aP<0.05).Cx43 基因mRNA在痉挛段、移行段肠管组织中低表达,表达率为23.7%和18.4%(mean±SD=0.62±0.11和0.51±0.07);而扩张段肠管组织中Cx43有较高表达,表达率为55.3% (mean±SD=1.37±0.19).38名正常人肠段对照组织中无1例Cx43 mRNA阳性表达. 结论:HD组织中Pax3和Cx43基因突变及表达异常可能与HD的发生相关密切,Pax3和Cx43突变可能造成信息传递缺陷,扰乱了神经嵴细胞的迁移,从而导致HD的发生.
出处 《世界华人消化杂志》 CAS 2004年第9期2254-2256,共3页 World Chinese Journal of Digestology
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