Abstract
Human papillomavirus causes various skin diseases and even cancer. Unfortunately, the host immune system often fails to generate effective responses against HPV infection due to the ability of HPV to evade immune-mediated eradication, although the detailed mechanisms by which HPV inhibits host antiviral immunity are not fully understood. In this study, we reported a novel role of HPV E7 oncoprotein in inducing the expression of co-inhibitory molecule cytotoxic T lymphocyte-associated antigen-4 (CTLA-4) in cells of epithelial origin. Mechanistically, HPV E7 protein downregulated the cellular abundance of Jumonji C histone demethylase 1B (JHDM1B), increasing the levels of H3K36 methylation within the promoter region of CTLA-4. Our findings expand the current understanding of HPV-mediated immune evasion mechanisms and may be helpful in developing optimal anti-HPV therapeutic strategies and relevant drugs.
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