ACLY 替代拼接与癌症表型相关.
Julianna G Supplee1, Hayley C Affronti2, Richard Duan2
1Department of Cancer Biology, University of Pennsylvania, Philadelphia, Pennsylvania, USA; Department of Biochemistry and Biophysics, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
The Journal of biological chemistry
|May 30, 2024
概括
ATP-酸酶 (ACLY) 拼接产生了两种异构体,但功能上的差异仍然不清楚. 尽管在癌症中发生了变化的拼接,但两种异型都不会影响细胞代谢,稳定性或瘤生长,这表明其在癌症中的作用需要进一步调查.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 癌症研究 癌症研究
背景情况:
- ATP-酸酶 (ACLY) 对于连接碳水化合物和脂质代谢至关重要,为细胞过程提供乙-CoA.
- ACLY存在于两个拼接异型:一个全长的"长"形式和一个缺少14号外子的"短"形式.
- 在各种癌症中观察到ACLY外基子14的变异拼接,与较差的生存率相关,促使对异形特异性功能进行调查.
研究的目的:
- 为了研究ACLY长和短异构体之间的潜在生化和功能差异.
- 探索ACLY外基子14拼接对细胞代谢,稳定性和癌症进展的影响.
- 确定ACLY剪接的调节机制及其与瘤免疫微环境的相关性.
主要方法:
- 在体外测试以评估ACLY异型和变异体的酶活性和稳定性.
- 在Acly淘汰赛细胞中进行再表达研究,以评估脂肪酸合成和基因素乙化中的异形功能.
- 对转录组数据,癌症的小鼠模型和与拼接调节因子的相关性研究的分析.
主要成果:
- 在实验室中,在ACLY异型或基突变物之间没有发现酶活性或稳定性的明显差异.
- 这两种异构体都有效地挽救了ACLY功能,包括脂肪酸合成和基因素乙化,在淘汰细胞中.
- 在小鼠中删除14号外子并没有影响发育或代谢生理学,也没有改变癌症模型中的瘤负担.
- ACLY拼接是由ESRP1调节的,ESRP1表达和ACLY拼接模式都与瘤免疫特征相关.
结论:
- 尽管癌症的拼接模式发生了变化,但在实验室或体内的ACLY异型之间没有发现任何功能差异.
- ACLY14外因子的剪接受ESRP1的调节,并且与瘤中的特定免疫特征有关.
- 癌症中ACLY异型变异的功能意义仍然难以捉摸,需要进一步研究.
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