Department of Otorhinolaryngology, Head and Neck Surgery, Medical University of Vienna, Währinger Gürtel 18-20, 1090, Vienna, Austria.
Division of Anatomy, Center for Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria.
J Cancer Res Clin Oncol. 2024 Jan 31;150(2):56. doi: 10.1007/s00432-023-05514-3.
PURPOSE: Human papilloma virus (HPV)-positive head and neck squamous cell carcinoma (HNSCC) displays distinct epidemiological, clinical, and molecular characteristics compared to the negative counterpart. Alterations in autophagy play an important role in cancer, and emerging evidence indicates an interplay of autophagy in HNSCC carcinogenesis and tumor promotion. However, the influence of HPV infection on autophagy in HNSCC has received less attention and has not been previously reviewed. Therefore, we here aimed to systematically review the role of autophagy explicitly in HPV HNSCC. METHODS: Studies accessible in PubMed, Embase, Scopus, and Web of Science investigating HNSCC, highlighting the molecular biological differences between HPV and HPV HNSCC and its influences on autophagy in HNSCC were analyzed according to the PRISMA statement. A total of 10 articles were identified, included, and summarized. RESULTS: The HPV16 E7 oncoprotein was reported to be involved in the degradation of AMBRA1 and STING, and to enhance chemotherapy-induced cell death via lethal mitophagy in HNSCC cells. Autophagy-associated gene signatures correlated with HPV-subtype and overall survival. Additionally, immunohistochemical (IHC) analyses indicate that high LC3B expression correlates with poor overall survival in oropharyngeal HNSCC patients. CONCLUSION: HPV may dampen general bulk autophagic flux via degradation of AMBRA1 but may promote selective autophagic degradation of STING and mitochondria. Interpretations of correlations between autophagy-associated gene expressions or IHC analyses of autophagy-related (ATG) proteins in paraffin embedded tissue with clinicopathological features without biological validation need to be taken with caution.
目的:与 HPV 阴性的头颈部鳞状细胞癌(HNSCC)相比,人乳头瘤病毒(HPV)阳性的 HNSCC 具有明显不同的流行病学、临床和分子特征。自噬的改变在癌症中起着重要作用,越来越多的证据表明自噬在 HNSCC 的发生和肿瘤促进中存在相互作用。然而,HPV 感染对 HNSCC 中自噬的影响受到的关注较少,且尚未被综述过。因此,我们旨在系统地综述自噬在 HPV HNSCC 中的明确作用。
方法:根据 PRISMA 声明,对可在 PubMed、Embase、Scopus 和 Web of Science 中获取的研究进行分析,这些研究重点关注 HPV 和 HPV HNSCC 之间的分子生物学差异及其对 HNSCC 中自噬的影响。共确定了 10 篇文章,将其纳入并进行了总结。
结果:HPV16 E7 癌蛋白被报道参与 AMBRA1 和 STING 的降解,并通过致命性噬作用增强 HNSCC 细胞中的化疗诱导细胞死亡。自噬相关基因特征与 HPV 亚型和总生存率相关。此外,免疫组织化学(IHC)分析表明,在口咽 HNSCC 患者中,LC3B 高表达与总生存率差相关。
结论:HPV 可能通过降解 AMBRA1 来抑制一般的细胞自噬通量,但可能通过选择性自噬降解 STING 和线粒体来促进其作用。对石蜡包埋组织中与临床病理特征相关的自噬相关基因表达或自噬相关蛋白(ATG)的 IHC 分析与总生存率之间的相关性的解释,需要谨慎进行,且需要进行生物学验证。
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