基因Gpx8,全称为谷胱甘肽过氧化物酶8,是一种位于内质网膜上的II型跨膜蛋白,属于谷胱甘肽过氧化物酶家族。该家族的成员主要负责清除细胞内的过氧化物,从而维持细胞的氧化还原平衡。Gpx8在多种生物学过程中发挥重要作用,包括细胞增殖、凋亡、迁移和免疫反应等。
研究表明,Gpx8在多种癌症中表达异常,与肿瘤的发生、发展和预后密切相关。例如,在肾透明细胞癌(ccRCC)中,Gpx8通过促进脂质生成,从而促进肿瘤的发生和发展[1]。在胶质瘤中,Gpx8通过调节泛凋亡,促进小胶质细胞迁移,并介导免疫治疗反应[2]。在肝细胞癌(HCC)中,Gpx8的表达下调与肿瘤的复发和不良预后相关[3]。此外,在胶质母细胞瘤(GBM)和肺癌中,Gpx8的表达上调与不良预后相关[4,5]。在胃癌中,Gpx8的表达上调也与不良预后相关[8]。
Gpx8的异常表达与多种信号通路相关。例如,在ccRCC中,Gpx8通过IL6-STAT3信号通路调节NNMT的表达,从而促进肿瘤的发生和发展[1]。在HCC中,Gpx8通过Hsc70/AKT信号通路调节肿瘤的发生和发展[3]。在GBM中,Gpx8与IL1/MYD88/IRAK/NF-κB通路相关[4]。此外,在肺癌中,Gpx8与免疫抑制微环境相关[7]。
此外,Gpx8的异常表达还与表观遗传修饰相关。例如,在口腔癌细胞中,Gpx8的缺乏导致氧化应激,从而重编程m6A表观转录组[6]。
综上所述,Gpx8在多种生物学过程中发挥重要作用,其异常表达与多种癌症的发生、发展和预后密切相关。Gpx8的研究有助于深入理解肿瘤的发生、发展和治疗机制,为癌症的治疗和预防提供新的思路和策略。
参考文献:
1. Nguyen, Tin Tin Manh, Nguyen, Thi Ha, Kim, Han Sun, Kim, Jin-Mo, Park, Sunghyouk. 2023. GPX8 regulates clear cell renal cell carcinoma tumorigenesis through promoting lipogenesis by NNMT. In Journal of experimental & clinical cancer research : CR, 42, 42. doi:10.1186/s13046-023-02607-2. https://pubmed.ncbi.nlm.nih.gov/36750850/
2. Chen, Zigui, Zheng, Dandan, Lin, Ziren, Xia, Ying, Luo, Qisheng. 2023. GPX8 regulates pan-apoptosis in gliomas to promote microglial migration and mediate immunotherapy responses. In Frontiers in immunology, 14, 1260169. doi:10.3389/fimmu.2023.1260169. https://pubmed.ncbi.nlm.nih.gov/37795080/
3. Tao, Chen-Yang, Wu, Xiao-Ling, Song, Shu-Shu, Shi, Ying-Hong, Fan, Jia. 2024. Downregulation of GPX8 in hepatocellular carcinoma: impact on tumor stemness and migration. In Cellular oncology (Dordrecht, Netherlands), 47, 1391-1403. doi:10.1007/s13402-024-00934-w. https://pubmed.ncbi.nlm.nih.gov/38607517/
4. Li, Sibo, Jiang, Xudong, Guan, Meicun, Cao, Yanfei, Zhang, Lina. 2022. The overexpression of GPX8 is correlated with poor prognosis in GBM patients. In Frontiers in genetics, 13, 898204. doi:10.3389/fgene.2022.898204. https://pubmed.ncbi.nlm.nih.gov/36061208/
5. Lu, Chih-Hao, Wei, Sung-Tai, Liu, Jia-Jun, Yu, Chin-Sheng, Chang, Sunny Li-Yun. 2022. Recognition of a Novel Gene Signature for Human Glioblastoma. In International journal of molecular sciences, 23, . doi:10.3390/ijms23084157. https://pubmed.ncbi.nlm.nih.gov/35456975/
6. Chen, Xun, Yuan, Lingyu, Zhang, Lejia, Zhao, Wei, Yu, Dongsheng. . GPX8 deficiency-induced oxidative stress reprogrammed m6A epitranscriptome of oral cancer cells. In Epigenetics, 18, 2208707. doi:10.1080/15592294.2023.2208707. https://pubmed.ncbi.nlm.nih.gov/37170591/
7. Bai, Ying, Han, Tao, Dong, Yunjia, Wu, Jing, Hu, Dong. 2024. GPX8+ cancer-associated fibroblast, as a cancer-promoting factor in lung adenocarcinoma, is related to the immunosuppressive microenvironment. In BMC medical genomics, 17, 77. doi:10.1186/s12920-024-01832-8. https://pubmed.ncbi.nlm.nih.gov/38515109/
8. Zhang, Xiaojie, Xu, Heng, Zhang, Yunan, Zhao, Dongbing, Guo, Chunguang. 2022. Immunohistochemistry and Bioinformatics Identify GPX8 as a Potential Prognostic Biomarker and Target in Human Gastric Cancer. In Frontiers in oncology, 12, 878546. doi:10.3389/fonc.2022.878546. https://pubmed.ncbi.nlm.nih.gov/35712475/