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宫颈癌发生过程中的表观遗传异常

Epigenetic Alterations in Cervical Carcinogenesis
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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)
关键词 后成说 遗传 微RNAS 宫颈肿瘤 乳头状瘤病毒科 Epigenesis genetic MicroRNAs Uterine cervical neoplasms Papillomaviridae
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参考文献29

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