在多发性骨髓瘤中,USP5通过激活STAT2-PFKFB4介导的糖解来激发免疫抑制的微环境
Shifeng Long1, Ting Ding2, Yongliang Zheng2
1Department of Hematology, The Affiliated Hospital of Jinggangshan University, Ji'an, 343000, Jiangxi Province, People's Republic of China. longshifeng1910@163.com.
乌比基特异性蛋白酶5 (USP5) 促进多发性骨髓瘤细胞生存和糖解,导致乳酸生产和免疫抑制. 抑制USP5可能为多发性骨髓瘤提供一种新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 免疫学 免疫学 免疫学
- 分子生物学分子生物学
背景情况:
- 糖解和乳酸盐的产生是癌症的标志,有助于免疫抑制瘤微环境.
- 乌比基特异性蛋白酶5 (USP5) 涉及多发性骨髓瘤 (MM) 细胞存活,但其在糖解和免疫调节中的作用尚不清楚.
研究的目的:
- 研究USP5在调节糖解,乳酸生产和多发性骨髓瘤中免疫抑制微环境中的作用.
- 阐明USP5影响这些过程的分子机制,并评估其治疗潜力.
主要方法:
- 基因和蛋白质表达通过qRT-PCR和西布洛特分析.
- 细胞活力,葡萄糖吸收,乳酸生产和ATP水平使用CCK-8,流细胞计和测试套件进行评估.
- 瘤相关的巨细胞两极分化通过M1/M2标记物分析进行评估.
- 通过使用双露西法酶报告者,ChIP和co-IP测定证实了分子相互作用;用异种移植模型进行体内验证.
主要成果:
- 在MM患者和细胞系中,USP5过度表达.
- 通过USP5 knockdown抑制MM细胞的生存和糖解,减少乳酸和M2类巨细胞的两极分化.
- USP5通过降低其无处不在的调节来稳定STAT2蛋白,激活PFKFB4转录,从而调节USP5的影响.
结论:
- USP5通过调节STAT2-PFKFB4信号通路来调节MM中的糖解和乳酸生产.
- 这种调节促进了类似M2的巨细胞两极分化,导致了免疫抑制的微环境.
- USP5代表了多发性骨髓瘤治疗的潜在治疗点.
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