Morgan Iain M, DiNardo Laurence J, Windle Brad
Philips Institute for Oral Health Research, Virginia Commonwealth University (VCU) School of Dentistry, Department of Oral and Craniofacial Molecular Biology, Richmond, VA 23298, USA.
VCU Massey Cancer Center, Richmond, VA 23298, USA.
Viruses. 2017 Aug 3;9(8):208. doi: 10.3390/v9080208.
Human papillomaviruses (HPV) are detected in 70-80% of oropharyngeal cancers in the developed world, the incidence of which has reached epidemic proportions. The current paradigm regarding the status of the viral genome in these cancers is that there are three situations: one where the viral genome remains episomal, one where the viral genome integrates into the host genome and a third where there is a mixture of both integrated and episomal HPV genomes. Our recent work suggests that this third category has been mischaracterized as having integrated HPV genomes; evidence indicates that this category consists of virus-human hybrid episomes. Most of these hybrid episomes are consistent with being maintained by replication from HPV origin. We discuss our evidence to support this new paradigm, how such genomes can arise, and more importantly the implications for the clinical management of HPV positive head and neck cancers following accurate determination of the viral genome status.
在发达国家,70%-80%的口咽癌中可检测到人乳头瘤病毒(HPV),其发病率已达到流行程度。目前关于这些癌症中病毒基因组状态的范式认为有三种情况:一种是病毒基因组保持游离状态,一种是病毒基因组整合到宿主基因组中,第三种是整合型和游离型HPV基因组混合存在。我们最近的研究表明,这第三种情况被错误地描述为具有整合的HPV基因组;证据表明,这一类别由病毒-人类杂交游离体组成。这些杂交游离体中的大多数与通过HPV起源的复制来维持一致。我们讨论了支持这一新范式的证据、此类基因组如何产生,更重要的是,在准确确定病毒基因组状态后,对HPV阳性头颈癌临床管理的影响。
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