了解 HLA-G 驱动的 HPV 感染到宫颈癌的历程:为拼图游戏添加缺失的部分。
Understanding HLA-G driven journey from HPV infection to cancer cervix: Adding missing pieces to the jigsaw puzzle.
机构信息
Department of Immunopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
Department of Immunopathology, Post Graduate Institute of Medical Education and Research, Chandigarh, India.
出版信息
J Reprod Immunol. 2020 Nov;142:103205. doi: 10.1016/j.jri.2020.103205. Epub 2020 Oct 21.
Human Papillomavirus (HPV) is a vital risk-factor for cancer cervix. However, persistent HPV infection results in cervical cancer in only a minority. Probably, HPV subdues the host immune response for persistence, which includes augmentation of HLA-G and plausibly aids in progression to cervical cancer. HLA-G, which comprises of membrane and soluble form, downregulates the host's immune response and generate tolerance. The current study aimed to analyze both forms of HLA-G in fresh tissue and plasma of women with HPV-infected and uninfected cervix and cancer cervix using Western blot and ELISA. The study cohort included 30 women with cervical carcinoma and equal number with normal cervix and 6 with HPV infected cervix. We observed a significant upregulation of membranous HLA-G expression in HPV infected cervix and cervical carcinoma (P < 0.001). Interestingly, the pairwise comparison of HLA-G tissue protein expression of the normal cervix and cervical carcinoma, as well as the normal cervix with HPV infected cervix, was significant (P < 0.001). Levels of soluble HLA-G were significantly raised in carcinoma cervix. We observed a progressive increase in HLA-G protein expression in HPV infected cervix and cervical carcinoma. These findings compel us to hypothesize that the upregulation of HLA-G expression favors the persistence of HPV in a microenvironment of a submissive host response. This progressive upregulation further leads to cervical cancer. Thus elimination of HPV infection seems to be a desirable proposition to prevent cervical cancer. In the absence of antiviral therapy for HPV, exploration of HLA-G antibody-based therapeutic strategies appear promising.
人乳头瘤病毒(HPV)是宫颈癌的重要危险因素。然而,只有少数持续性 HPV 感染会导致宫颈癌。可能是 HPV 抑制了宿主的免疫反应,使其持续存在,包括 HLA-G 的增强,并可能有助于宫颈癌的进展。HLA-G 包括膜型和可溶性形式,下调宿主的免疫反应并产生耐受性。本研究旨在使用 Western blot 和 ELISA 分析 HPV 感染和未感染宫颈以及宫颈癌妇女新鲜组织和血浆中的两种 HLA-G 形式。研究队列包括 30 名宫颈癌妇女和 30 名正常宫颈妇女,以及 6 名 HPV 感染宫颈妇女。我们观察到 HPV 感染宫颈和宫颈癌中膜型 HLA-G 表达显著上调(P<0.001)。有趣的是,正常宫颈和宫颈癌以及正常宫颈与 HPV 感染宫颈之间的 HLA-G 组织蛋白表达的两两比较均有显著差异(P<0.001)。可溶性 HLA-G 水平在宫颈癌中显著升高。我们观察到 HPV 感染宫颈和宫颈癌中 HLA-G 蛋白表达逐渐增加。这些发现使我们假设 HLA-G 表达的上调有利于 HPV 在宿主反应顺从的微环境中持续存在。这种逐渐增加的上调进一步导致宫颈癌。因此,消除 HPV 感染似乎是预防宫颈癌的理想选择。鉴于目前尚无针对 HPV 的抗病毒治疗方法,探索 HLA-G 抗体为基础的治疗策略似乎很有前途。