组蛋白修饰与胃肠道恶性肿瘤的关系

目的探讨组蛋白修饰与胃肠道恶性肿瘤的关系。方法复习组蛋白修饰以及组蛋白修饰与胃肠道恶性肿瘤之间关系的相关文献并进行综述。结果组蛋白的修饰为表遗传改变之一,能导致基因表达的改变,在恶性肿瘤的发生、发展中起重要作用。DNA甲基化与组蛋白修饰间相互作用,形成复杂系统,维持基因沉默。表观遗传修饰具有可逆性,逆转表观遗传修饰,从而改变基因表达状态,可能使恶性肿瘤细胞正常化(称为表观基因治疗)。表观基因治疗对于胃肠道恶性肿瘤的预防和治疗具有广阔的应用前景,但还有许多问题需进一步研究证实。结论组蛋白修饰与胃肠道恶性肿瘤的发生有关,逆转表观遗传修饰导致的基因表达改变对于胃肠道恶性肿瘤的预防和治疗具有重要意义。

Relationship Between Histone Modifications and Gastrointestinal Cancer

Objective To review the relationship between histone modifications and gastrointestinal cancer.Methods Literatures on histone modifications and the relationship between histone modifications and gastrointestinal cancer were collected and reviewed.Results Histone modifications played an important role in the establishment of gene silencing during tumorgenesis.DNA methylation and histone modifications might interact with each other and form a complex network to establish and maintain gene silencing.Restoring gene function silenced by epigenetic changes in cancer had the potential of 'normalizing' cancer cells,which was named epigenetic therapy.Epigenetic therapy was very promising in prevention and treatment of gastrointestinal cancer,but many unsolved issues remain which need to be addressed in future studies.Conclusion Histone modifications are associated with the pathogenesis of gastrointestinal cancer.Restoring gene function silenced by epigenetic changes may have a great role in the prevention and treatment of gastrointestinal cancer.