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胃癌发生中后生修饰的异常 被引量:5

Aberrant post-modification in carcinogenesis of the stomach
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摘要 胃癌是消化系统常见的恶性肿瘤,其发生与发展与肿瘤相关基因的表达异常,包括癌基因的过度表达和抑癌基因的失活等有关。染色体由DNA和组蛋白等组成,DNA的甲基化和组蛋白的乙酰化是调控各种基因表达的后生修饰的主要内容。甲基化使基因转录水平降低,而与基因相关的组蛋白的乙酰化往往活化该基因。胃癌的发生中常常有总基因组DNA甲基化水平降低、c-Ha-ras等癌基因的低甲基化和包括p16^(INK4A)等抑癌基因的高甲基化,及p21^(WAF1)基因相关组蛋白的低乙酰化紊乱等。本文重点讨论几种较重要的肿瘤相关基因的后生修饰变化和纠正策略。
作者 房静远
出处 《世界华人消化杂志》 CAS 2002年第7期749-752,共4页 World Chinese Journal of Digestology
基金 国家自然科学基金(30170413) 高等学校全国优秀博士学位论文作者专项资金(199946)
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