Human papillomavirus type 16 antagonizes IRF6 regulation of IL-1β

Human papillomavirus type 16 (HPV16) and other oncoviruses have been shown to block innate immune responses and to persist in the host. However, to avoid viral persistence, the immune response attempts to clear the infection. IL-1β is a powerful cytokine produced when viral motifs are sensed by innate receptors that are members of the inflammasome family. Whether oncoviruses such as HPV16 can activate the inflammasome pathway remains unknown. Here, we show that infection of human keratinocytes with HPV16 induced the secretion of IL-1β. Yet, upon expression of the viral early genes, IL-1β transcription was blocked. We went on to show that expression of the viral oncoprotein E6 in human keratinocytes inhibited IRF6 transcription which we revealed regulated IL-1β promoter activity. Preventing E6 expression using siRNA, or using E6 mutants that prevented degradation of p53, showed that p53 regulated IRF6 transcription. HPV16 abrogation of p53 binding to the IRF6 promoter was shown by ChIP in tissues from patients with cervical cancer. Thus E6 inhibition of IRF6 is an escape strategy used by HPV16 to block the production IL-1β. Our findings reveal a struggle between oncoviral persistence and host immunity; which is centered on IL-1β regulation.

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PID https://www.doi.org/10.1371/journal.ppat.1007158
URL https://figshare.com/articles/Human_papillomavirus_type_16_antagonizes_IRF6_regulation_of_IL-1_/6947822
URL http://dx.doi.org/10.1371/journal.ppat.1007158
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Author Ainouze, Michelle
Author Rochefort, Pauline
Author Parroche, Peggy
Author Roblot, Guillaume
Author Tout, Issam
Author Briat, François
Author Zannetti, Claudia
Author Marotel, Marie
Author Goutagny, Nadege
Author Auron, Philip
Author Traverse-Glehen, Alexandra
Author Lunel-Potencier, Aude
Author Golfier, Francois
Author Masson, Murielle
Author Robitaille, Alexis
Author Tommasino, Massimo
Author Carreira, Christine
Author Walzer, Thierry
Author Henry, Thomas
Author Zanier, Katia
Author Trave, Gilles
Author Hasan, Uzma Ayesha
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Collected From figshare
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Publication Date 2018-01-01
Publisher Figshare
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Source https://science-innovation-policy.openaire.eu/search/dataset?datasetId=r37980778c78::1416208af9420f9164306c5d7657a74c
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Last Updated 31 December 2020, 14:21 (CET)
Created 31 December 2020, 14:21 (CET)