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Modulation of Apoptotic Pathways by Human Papillomaviruses (HPV): Mechanisms and Implications for Therapy

Department of Basic Sciences, Loma Linda University School of Medicine, 11085 Campus St., Loma Linda, CA 92354, USA
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Viruses 2012, 4(12), 3831-3850; https://doi.org/10.3390/v4123831
Received: 16 November 2012 / Revised: 12 December 2012 / Accepted: 14 December 2012 / Published: 18 December 2012
The ability of the host to trigger apoptosis in infected cells is perhaps the most powerful tool by which viruses can be cleared from the host organism. To avoid elimination by this mechanism, human papillomaviruses (HPV) have developed several mechanisms that enable the cells they infect to elude both extrinsic and intrinsic apoptosis. In this manuscript, we review the current literature regarding how HPV-infected cells avoid apoptosis and the molecular mechanisms involved in these events. In particular, we will discuss the modifications in intrinsic and extrinsic apoptotic pathways caused by proteins encoded by HPV early genes. Many of the current efforts regarding anti-cancer drug development are focused on directing tumor cells to undergo apoptosis. However, the ability of HPV-infected cells to resist apoptotic signals renders such therapies ineffective. Possible mechanisms for overcoming the resistance of HPV-infected tumor cells to anticancer drugs will be discussed. View Full-Text
Keywords: apoptosis; HPV; papillomavirus; anti-HPV therapies; E2; E5; E6; E6*; E7 apoptosis; HPV; papillomavirus; anti-HPV therapies; E2; E5; E6; E6*; E7
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Yuan, C.-H.; Filippova, M.; Duerksen-Hughes, P. Modulation of Apoptotic Pathways by Human Papillomaviruses (HPV): Mechanisms and Implications for Therapy. Viruses 2012, 4, 3831-3850.

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