148
生物化学与嫩物物理进展Prog.Biochem.Biophys.2009;36(2)
纛缰蛋自修馋在基因组不隧位置上存在鼹餐种摆互关系,还进一步分析了它们同染色体结构以及基因表达之间的相关性【58】.如果将类似的高通量技术同时用以检测哺乳动物中DNA甲基化和其他表观遗传因素,燹|J必将鸯疆快我们对于DNA甲基化和其他表观遗健隧素如何共霜调节基陵表达豹理解帮认识.
7结论和展望
作为黉接箨蠲予DNA序麓酶表观遗传修饰,DNA甲基化在基因表达调控中扮演着壤要角色.虽然DNA甲基化是各种表观遗传学现象中最早被人们认识也是研究相对较成熟的现象之一,但是目
前对丁DNA甲基化的枫遴机制静探索还仍然处于比较初级的阶段.随着各种高逶量检测技术的发展和应用,备种正常组织以及癌症组织的DNA甲基化数据将不断涌现,这就给从事牛物信息研究的科学工作者提供了大量研究数据、提出了大量新的研究谋遮。分搴厅剩震这些海楚舱数据无疑需要开发更多更有效的计算方法和工具.利用来自不同样本不同组织的DNA甲基化数据,可以深层次探讨DNA甲基化在人群中的差异性以发组织特异的DNA甲基化模式.虽然保护枫簇觞假说缝够一是程度上解释CpG岛不易被甲摹他的机制,但是该假说是否全面揭示了其真实机理,是否还有其他更多甚争更重要的凼豢参与其中,这螳问题都有待进一步验证。另外,结合其他表观遗传现象对人类基因组进行系统研究也是认识基因表达的必然之路。在医学应用上,寻找和特定疾病相关的DNA甲基化标识,利用这些标识对疾病进行检测,并研制使异常甲基化还缘的药物也是极媳发展前景的方向.
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