一种乳酸脱酶A异型的LDHAα促进糖解和瘤进展
Bingqing Huang1,2, Wencui Shen3, Yujiao Jia1,2
1State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Haihe Laboratory of Cell Ecosystem, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin, China.
The FEBS journal
|January 20, 2025
概括
研究人员发现了一种新的蛋白质亚型,乳酸脱酶Aα (LDHAα),与癌症生长有关. 这种LDHA亚型显著影响瘤代谢和增殖,为癌症治疗提供了潜在的新治疗标.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- 乳酸脱酶A (LDHA) 在癌症中经常被上调,这有助于华堡效应.
- 与瘤相关的基因经常表现出在癌症发展中发挥关键作用的亚型.
研究的目的:
- 识别和描述新型LDHA转录及其蛋白质产物.
- 研究一种新发现的LDHA亚型 (LDHAα) 在癌细胞增殖,迁移和瘤生长中的作用.
主要方法:
- 识别一种编码LDHAα的新型LDHA转录.
- 在体外和体内实验评估LDHAα表达和删除对瘤细胞的影响.
- 用CRISPR-sgRNA技术进行LDHAα删除.
- 对葡萄糖摄入量和乳酸盐产量的分析.
- 调控因素 (c-MYC,FOXM1) 和治疗化合物效应的研究.
- 在人类癌症组织中的表达分析.
主要成果:
- 一个新的LDHA转录生成了一个蛋白质LDHAα,比LDHA大3kDa.
- 胚胎外表达的LDHAα增强了癌细胞的增殖和迁移在体外和促进瘤生长在体内.
- 通过CRISPR介导的LDHAα的删除显著抑制了瘤细胞的生长.
- LDHAα影响了葡萄糖的摄取和乳酸盐的产生,主要局部在细胞质中.
- 鉴定出c-MYC和FOXM1是LDHA和LDHAα表达的关键调节者.
- 一种LDHA的小分子抑制剂也抑制了LDHAα的活性.
- 在急性淋巴细胞白血病和结直肠癌组织中观察到LDHAα,LDHA和c-MYC的高表达.
结论:
- LDHAα是一种新的LDHA亚型,在瘤代谢和进展中起着重要作用.
- LDHAα代表了癌症诊断的潜在新生物标志物和癌症治疗的治疗点.
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