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- W4282914404 abstract "Abstract The activation of oncogenic K-ras by mutations may stimulate multiple cellular processes including lipids modification. However, the mechanisms by which K-ras affects lipid metabolism remain poorly understood. In this study, we found that PLA2G2A, an enzyme that hydrolyzes membrane phospholipids at sn-2 position to release polyunsaturated fatty acids (PUFA), was up-regulated by K-ras activation and its high expression was correlated with poor survival of patients with pancreatic ductal adenocarcinoma (PDAC). Abrogation of PLA2G2A by siRNA silencing or pharmacological inhibition significantly suppressed the proliferation of K-ras-driven cancer cells, as evidenced by inhibition of cell growth and loss of colony formation capacity. Suppression of PLA2G2A could also decrease K-ras-driven PDAC cell migration. Mechanistic study showed that PLA2G2A inhibition rendered cells vulnerability to lipid peroxidation, likely due to accumulation of excessive PUFA in the membranes. Such alterations resulted in membrane damage and mitochondrial dysfunction with elevated ROS, leading to a reduction in energy production and a decrease in acetyl-CoA, which further compromised de novo lipid biosynthesis. Our study suggests that PLA2G2A-mediated cell membrane remodeling plays an important role in cell survival and proliferation in during K-ras-driven cancer, and that PLA2G2 could be a potential therapeutic target for pancreatic cancer treatment. Citation Format: Mingquan zhang, Peng huang. The inhibition of PLA2G2A decreases K-ras-driven pancreatic cancer growth and migration through damaging cell membrane and mitochondria function [abstract]. In: Proceedings of the American Association for Cancer Research Annual Meeting 2022; 2022 Apr 8-13. Philadelphia (PA): AACR; Cancer Res 2022;82(12_Suppl):Abstract nr 5804." @default.
- W4282914404 created "2022-06-16" @default.
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- W4282914404 date "2022-06-15" @default.
- W4282914404 modified "2023-10-07" @default.
- W4282914404 title "Abstract 5804: The inhibition of PLA2G2A decreases K-ras-driven pancreatic cancer growth and migration through damaging cell membrane and mitochondria function" @default.
- W4282914404 doi "https://doi.org/10.1158/1538-7445.am2022-5804" @default.
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