通过调节PGK1的化修饰,OXCT1促进了三阴性乳腺癌的免疫逃生
Hongchen Zhang1, Min Ling2, Yuheng Zhang3
1Department of Breast Surgery, The First Affiliated Hospital of Zhejiang Chinese Medical University (Zhejiang Provincial Hospital of Chinese Medicine), Hangzhou, 310006, China.
Communications biology
|July 9, 2025
概括
3氧酸CoA转移酶1 (OXCT1) 通过有氧糖解促进三阴性乳腺癌 (TNBC) 的生长和通过有氧糖解进行免疫逃生. 干扰OXCT1可以抑制TNBC的进展,并增强抗瘤免疫力.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 代谢过程中的代谢.
背景情况:
- 三阴性乳腺癌 (TNBC) 是一种具有有限治疗选择的侵袭性亚型.
- 有氧糖解是癌症的标志,有助于瘤生长和免疫逃避.
- 3氧酸CoA转移酶1 (OXCT1) 在TNBC的代谢重编程和免疫逃脱中的作用尚不清楚.
研究的目的:
- 调查OXCT1在促进TNBC生长和免疫逃脱中的特定作用.
- 为了阐明氧化糖溶解驱动的TNBC中OXCT1的调节机制.
- 探索TNBC中OXCT1,糖酸激酶1 (PGK1) 和氨酸甲基转移酶5A (KMT5A) 之间的关系.
主要方法:
- 使用TNBC细胞系和患者衍生器官 (PDO) 的体外研究.
- 对OXCT1和KMT5A表达的操纵.
- 对细胞增殖,乳酸分泌,PD-L1表达和T细胞死亡的分析.
- 研究蛋白质的修饰 (succinylation,ubiquitination) 和组织蛋白甲基化 (H4K20me1).
- 与临床TNBC样本的相关性分析.
主要成果:
- 过度表达OXCT1增强了TNBC细胞的增殖和PD-L1的表达,效应被2-DG扭转.
- 在PDO中OXCT1干扰减少瘤生长,乳酸分泌,并增加T细胞杀死.
- OXCT1通过K146的化增加了PGK1蛋白的稳定性,独立于PGK1的mRNA水平.
- KMT5A通过增加OXCT1促进者的H4K20me1水平来促进OXCT1的表达.
结论:
- 通过增强有氧糖解,OXCT1在促进TNBC生长和免疫逃逸方面发挥着至关重要的作用.
- 通过KMT5A介导的组织素甲基化可调节OXCT1的表达.
- OXCT1通过化稳定PGK1,进一步推动TNBC中的有氧糖解和免疫逃避.
- 向OXCT1为TNBC提供了一个潜在的治疗策略.
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