Y12C突变破坏了IMPDH细胞和改变了癌症代谢
Chia-Chun Chang1, Min Peng1, Gerson Dierley Keppeke2,3
1Institute of Biotechnology, National Taiwan University, Taipei, Taiwan.
The FEBS journal
|April 5, 2025
概括
氨酸单酸脱酶 (IMPDH) 聚合形成细胞,影响细胞GTP水平和癌症中的代谢调节. 干扰这个过程减少了瘤的生长,这表明了潜在的治疗点.
科学领域:
- 生物化学 生化学
- 细胞生物学 细胞生物学
- 癌症研究 癌症研究
背景情况:
- 关三酸盐 (GTP) 对细胞功能至关重要,其合成由因单酸脱酶 (IMPDH) 调节.
- IMPDH活动是由核酸结合调节的,最近的发现表明它可以聚合成线性结构.
- 这些聚合物可能形成细胞,与细胞GTP需求相关的结构,但它们在体内作用尚不清楚.
研究的目的:
- 研究IMPDH聚合和细胞在人类癌症中的存在和功能意义.
- 确定扰乱IMPDH聚合物的对癌细胞代谢和瘤生长的影响.
主要方法:
- 在人类癌症组织中检测到IMPDH细胞.
- 利用ABEmax基编辑器在IMPDH2中引入Y12C突变,防止癌细胞系中的聚合和细胞ophidium形成.
- 分析了IMPDH聚合和不聚合的癌症异种移植中的代谢途径和瘤生长.
主要成果:
- 在各种人类癌症组织中,IMPDH细胞很普遍.
- 这种Y12C突变取消了IMPDH聚合和cytoophidium组装.
- 缺少IMPDH聚合物导致一些异种移植中IMPDH,糖溶性和酸通路的下调.
- 与野生类型相比,突变的HeLa细胞衍生的异种移植体现出明显较小的瘤大小.
结论:
- 在某些癌症中,IMPDH聚合和细胞组合在代谢恒常中发挥作用.
- 干扰IMPDH聚合会影响癌细胞代谢和瘤进展.
- IMPDH细胞是癌症治疗的潜在目标.
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