通过调节能量供应并加速G1/S过渡,APC/C调控的CPT1C促进瘤进展
Huihui Zhao1, Xinxin Cheng1, Liping Yan2
1Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing), Laboratory of Molecular Oncology, Peking University Cancer Hospital & Institute, Beijing, 100142, China.
亚纳酶促进复合体/环体 (APC/C) 调节细胞循环和新陈代谢. 这项研究确定了卡尼丁棕甲基转移酶1C (CPT1C) 是一种新型APC/C基质,它将脂肪酸氧化与瘤进展和生存联系起来.
科学领域:
- 细胞生物学 细胞生物学
- 癌症新陈代谢 癌症新陈代谢
- 分子瘤学分子瘤学
背景情况:
- 亚纳酶促进复合体/循环体 (APC/C) 控制细胞循环的进展,并通过降解关键酶来影响细胞代谢.
- 脂肪酸氧化对于瘤细胞生长至关重要,但其与APC/C活动的联系尚不清楚.
研究的目的:
- 调查卡尼丁棕转移酶1C (CPT1C) 在瘤进展中的作用.
- 探索CPT1C,APC/C和癌细胞中的脂肪酸代谢之间的关系.
主要方法:
- 使用免疫阻塞和流式细胞计量研究了CPT1C表达和细胞周期依赖性.
- 通过近距离结合和共免疫沉试验评估了CPT1C-APC/C相互作用.
- 评估了CPT1C在瘤生长,新陈代谢和生存中的作用,使用体外和体内测试,包括患者样本上的异位移植和免疫组织化学.
主要成果:
- 确定了CPT1C作为一种新的APC/C基质,其细胞循环依赖的表达在G1/S达到峰值.
- 升高的CPT1C促进细胞增殖,增强脂肪酸利用率,增加ATP水平,减少活性氧物种.
- 在食道状细胞癌中高CPT1C表达与患者存活率较差相关.
结论:
- CPT1C链接脂肪酸代谢和瘤细胞的细胞循环调节.
- 在代谢压力下,CPT1C通过增强ATP和保持氧化还原平衡来促进瘤增殖和生存.
- CPT1C作为食道状细胞癌的潜在独立预后生物标志物.
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