氨酸调节了对抗西斯丁的膀癌微环境中的代谢脆弱性
Chen Yang1,2,3, Yuxi Ou1,2, Quan Zhou1,2
1Department of Urology, Huashan Hospital, Fudan University, Shanghai, China.
Cell death & disease
|August 15, 2023
概括
膀癌 (BCa) 中的西斯普拉丁耐药性涉及MAT2A调节的甲氨酸代谢. 向MAT2A和SLC7A6克服了抵抗,特别是在免疫能力强的模型中,提供了新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 癌症新陈代谢 癌症新陈代谢
- 分子生物学分子生物学
背景情况:
- 西斯普拉丁耐药性是膀癌 (BCa) 治疗的一个主要挑战.
- 驱动这种耐药性的代谢脆弱性尚未完全理解.
- 了解瘤微环境的作用对于开发有效疗法至关重要.
研究的目的:
- 阐明在BCa微环境中的基斯普拉丁耐药性的代谢调节机制.
- 为了确定关键的分子参与者和涉及化学抵抗的途径.
- 探索潜在的治疗点,以克服BCa.中的西斯普拉丁耐药性.
主要方法:
- 对BCa细胞进行综合的多组学分析 (代谢学和蛋白学).
- 使用细胞和体内模型验证关键蛋白质和RNA分子.
- 对circARHGAP10/TRIM25/MAT2A调节通路的研究.
- 评估瘤透淋巴细胞和免疫细胞表型.
- 对协同治疗抑制策略的评估.
主要成果:
- MAT2A调节的甲氨酸代谢被确定为BCa中西斯普拉丁耐药性的关键贡献者.
- 发现circARHGAP10通过无素-蛋白酶体通路降解MAT2A,影响癌症干细胞标记物.
- 过度表达circARHGAP10和氨酸限制在免疫缺陷模型中克服了耐药性,但不是免疫能力模型.
- 低氨酸水平导致CD8+ T细胞耗尽,高SLC7A6表达与低CD8+ T细胞透相关.
- 协同抑制MAT2A和SLC7A6在免疫能力模型中克服了西斯普拉丁耐药性.
结论:
- 抗西斯丁BCa细胞依赖于氨酸生存和干细胞更新.
- 这种circARHGAP10/TRIM25/MAT2A通路在抗西斯普拉丁的BCa中至关重要.
- circARHGAP10和SLC7A6代表了对抗西斯普拉丁的BCa有希望的治疗点.
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