Epstein-Barr Virus-Induced Epigenetic Pathogenesis of Viral-Associated Lymphoepithelioma-Like Carcinomas and Natural Killer/T-Cell Lymphomas.

Epstein-Barr Virus-Induced Epigenetic Pathogenesis of Viral-Associated Lymphoepithelioma-Like Carcinomas and Natural Killer/T-Cell Lymphomas.
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EB 病毒诱导的病毒相关淋巴上皮瘤样癌和自然杀伤/T 细胞淋巴瘤的表观遗传发病机制。

DOI:
10.3390/pathogens7030063
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发表时间:
2018-07-18
期刊:
Pathogens (Basel, Switzerland)
影响因子:
--
通讯作者:
Tao Q
Tao Q
中科院分区:
其他
文献类型:
--
作者:
Li L;Ma BBY;Chan ATC;Chan FKL;Murray P;Tao Q

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EB病毒(EBV)相关肿瘤的癌症基因组研究,包括鼻咽(NPC)、胃(EBVaGC)和肺组织的淋巴上皮瘤样癌(LELC),以及自然杀伤(NK)/T细胞淋巴瘤(NKTCL),揭示了基因组改变的独特特征,与其他常见癌症相比,检测到的基因突变较少。现在已知表观遗传改变在EBV相关肿瘤的发病机制中起关键作用。作为一种致癌病毒,EBV利用被劫持的细胞表观遗传机制,在B淋巴和上皮细胞中建立其潜伏性和溶解性感染。EBV编码的癌蛋白调节细胞表观遗传机制,以重新编程病毒和宿主表观基因组,特别是在感染的早期阶段,使用宿主表观遗传调节因子。全基因组表观遗传学改变进一步破坏了一系列肿瘤抑制基因(TSG),并破坏了关键的细胞信号通路,有助于EBV相关癌症的发生和发展。对全基因组CpG甲基化变化(CpG甲基化组)的分析揭示了EB病毒相关肿瘤中TSGs全球高度甲基化的独特表观基因型。在这里,我们总结了EBV相关肿瘤(LELCs和NKTCL)的表观遗传学改变的最新进展,强调了表观遗传病因学在EBV相关肿瘤发生中的重要性。对这些EBV相关肿瘤的表观遗传学研究将发现有价值的生物标志物,用于早期检测和预后预测,并为这些癌症开发有效的表观遗传治疗方法。
Cancer genome studies of Epstein-Barr virus (EBV)-associated tumors, including lymphoepithelioma-like carcinomas (LELC) of nasopharyngeal (NPC), gastric (EBVaGC) and lung tissues, and natural killer (NK)/T-cell lymphoma (NKTCL), reveal a unique feature of genomic alterations with fewer gene mutations detected than other common cancers. It is known now that epigenetic alterations play a critical role in the pathogenesis of EBV-associated tumors. As an oncogenic virus, EBV establishes its latent and lytic infections in B-lymphoid and epithelial cells, utilizing hijacked cellular epigenetic machinery. EBV-encoded oncoproteins modulate cellular epigenetic machinery to reprogram viral and host epigenomes, especially in the early stage of infection, using host epigenetic regulators. The genome-wide epigenetic alterations further inactivate a series of tumor suppressor genes (TSG) and disrupt key cellular signaling pathways, contributing to EBV-associated cancer initiation and progression. Profiling of genome-wide CpG methylation changes (CpG methylome) have revealed a unique epigenotype of global high-grade methylation of TSGs in EBV-associated tumors. Here, we have summarized recent advances of epigenetic alterations in EBV-associated tumors (LELCs and NKTCL), highlighting the importance of epigenetic etiology in EBV-associated tumorigenesis. Epigenetic study of these EBV-associated tumors will discover valuable biomarkers for their early detection and prognosis prediction, and also develop effective epigenetic therapeutics for these cancers.
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