摘要
表观遗传指DNA序列不发生变化,而基因表达却发生可遗传的改变。在宫颈癌发生过程中,表观遗传改变不仅影响着人乳头瘤病毒(HPV)致癌基因的异常表达,而且可导致宿主细胞多个癌基因激活和抑癌基因的失活。近年发现,表观遗传和微小RNA(miRNA)相互调控异常也与宫颈癌发生密切相关。表观遗传异常可导致具有抑癌作用的miRNA沉默表达,miRNA也可通过DNA甲基化和组蛋白修饰促进病毒的DNA修复、抑癌基因表达沉默。
Epigenetics is defined as the study of inherited changes in phenotype or gene expression caused by mechanisms other than changes in the underlying DNA sequence. During cervical carcinogenesis, cancer-associated epigenetic alterations can affect the expression of HPV oncogenes. Additionally, it can control the overexpression of oncogene and underexpression of tumor-suppressor genes. Recent researches have proved that the abnormal interaction miRNAs and epigenetics definitively linked to HPV associated cervical cancer. Aberrant epigenetics are involved in silencing of tumor-suppressor miRNAs in carcinogenesis. On the other hand, miRNAs can improve the repair of viral DNA and silence tumor-suppressor genes by regulating DNA methylation or histone modifications.
出处
《国际妇产科学杂志》
CAS
2011年第4期311-315,F0003,共6页
Journal of International Obstetrics and Gynecology
基金
国家自然科学基金(30973173
30872752)