磷酸戊糖途径
宫颈癌
细胞生长
癌症研究
细胞培养
赫拉
酶
葡萄糖-6-磷酸脱氢酶
化学
癌症
细胞
生物
糖酵解
脱氢酶
生物化学
遗传学
作者
Qingfei Meng,Yanghe Zhang,Huihui Sun,Xiangzhe Yang,Shiming Hao,Bin Liu,Honglan Zhou,Yishu Wang,Zhi‐Xiang Xu
标识
DOI:10.1016/j.redox.2024.103108
摘要
High-risk human papillomaviruses (HPVs) are the causative agents of cervical cancer. Here, we report that HPV16 E6E7 promotes cervical cancer cell proliferation by activating the pentose phosphate pathway (PPP). We found that HPV16 E6 activates the PPP primarily by increasing glucose-6-phosphate dehydrogenase (G6PD) enzyme activity. Mechanistically, HPV16 E6 promoted G6PD dimer formation by inhibiting its lactylation. Importantly, we suggest that G6PD K45 was lactylated during G6PD-mediated antioxidant stress. In primary human keratinocytes and an HPV-negative cervical cancer C33A cells line ectopically expressing HPV16 E6, the transduction of G6PD K45A (unable to be lactylated) increased GSH and NADPH levels and, correspondingly, decreasing ROS levels. Conversely, the re-expression of G6PD K45T (mimicking constitutive lactylation) in HPV16-positive SiHa cells line inhibited cell proliferation. In vivo, the inhibition of G6PD enzyme activity with 6-aminonicotinamide (6-An) or the re-expression of G6PD K45T inhibited tumor proliferation. In conclusion, we have revealed a novel mechanism of HPV oncoprotein-mediated malignant transformation. These findings might provide effective strategies for treating cervical and HPV-associated cancers.
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