Targeting DTX2/UFD1-mediated FTO degradation to regulate antitumor immunity

• 成果类型: Article
• 署名作者: Cui, Yan-Hong; Wei, Jiangbo; Fan, Hao; Li, Wenlong; Zhao, Lijie; Wilkinson, Emma; Peterson, Jack; Xie, Lishi; Zou, Zhongyu; Yang, Seungwon; Applebaum, Mark A.; Kline, Justin; Chen, Jing; He, Chuan; He, Yu-Ying
• 署名单位: University of Chicago; University of Chicago; University of Chicago; University of Chicago; University of Chicago; University of Chicago; University of Chicago; University of Chicago; Howard Hughes Medical Institute
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-9704
• DOI: 10.1073/pnas.2407910121
• 发表日期: 2024-12-09
• 关键词: vitamin-e succinate; cancer-treatment; fat mass; rna; ubiquitin; cells; expression; binding; lif; derivatives

摘要

Here, we show that vitamin E succinate (VES) acts as a degrader for the m6A RNA demethylase fat mass and obesity- associated protein (FTO), thus suppressing tumor growth and resistance to immunotherapy. FTO is ubiquitinated by its E3 ligase DTX2, followed by UFD1 recruitment and subsequent degradation in the proteasome. VES binds to FTO and DTX2, leading to enhanced FTO-DTX2 interaction, FTO ubiquitination, and degradation in FTO- dependent tumor cells. VES suppressed tumor growth and enhanced antitumor immunity and response to immunotherapy in vivo in mouse models. Genetic FTO knockdown or VES treatment increased m6A methylation in the LIF (Leukemia Inhibitory Factor) gene and decreased LIF mRNA decay, and thus sensitized melanoma cells to T cell-mediated cytotoxicity. Taken together, our findings reveal the underlying molecular mechanism for FTO protein degradation and identify a dietary degrader for FTO that inhibits tumor growth and overcomes immunotherapy resistance.