聚皮里米丁管结合蛋白1在乳腺癌代谢和进展中的致癌功能
Manabu Futamura1, Yoshihisa Tokumaru1, Akira Nakakami1
1Department of Breast Surgery, Gifu University Hospital, 1-1 Yanagido, Gifu, 501-1194, Japan.
在乳腺癌中,聚皮里米丁管结合蛋白1 (PTBP1) 过度表达,导致华堡效应和不良预后. 抑制PTBP1减少了癌症的扩散和改变了癌症的新陈代谢,这表明它是一个治疗点.
科学领域:
- 分子生物学分子生物学
- 癌症研究 癌症研究
- 代谢调节 代谢调节 代谢调节
背景情况:
- 聚皮里米丁管结合蛋白1 (PTBP1) 是一种RNA结合蛋白,可以调节替代拼接.
- PTBP1通过pyruvate kinase肌肉 (PKM) 拼接影响癌症代谢,影响糖解和华堡效应.
- 以前的研究通过微RNA调节将PTBP1与癌症代谢联系起来.
研究的目的:
- 研究PTBP1在乳腺癌 (BC) 代谢和预后中的作用.
- 为了确定PTBP1过度表达是否与乳腺癌患者的不良结果有关.
- 探索PTBP1调制对乳腺癌细胞增殖和代谢重编程的影响.
主要方法:
- 在TCGA和METABRIC数据集的分析中,分析PTBP1表达和患者预后.
- 在体外实验中,PTBP1在MCF7,SK-BR-3和MDA-MB-231乳腺癌细胞系中被淘汰.
- 分析PKM1/PKM2比率,ATP生产,NADH水平和PTBP1淘汰后的乳酸积累.
- 在手术乳腺癌样本和相邻的正常组织中对PTBP1表达的qRT-PCR分析.
主要成果:
- 过度表达PTBP1显著与乳腺癌患者的预后不佳相关.
- 在BC细胞系中抑制PTBP1增加了PKM1表达和PKM1/PKM2比率,减少了细胞增殖.
- 观察到的代谢变化包括改变ATP生产,增加NADH和增加乳酸积累,因细胞系而异.
- 与正常组织相比,在瘤组织中证实了明显更高的PTBP1表达,与瘤等级正相关.
结论:
- 在乳腺癌中,PTBP1在瘤上升调节,导致与华堡效应一致的代谢重编程.
- PTBP1在调节乳腺癌特异性新陈代谢方面发挥着至关重要的作用.
- PTBP1代表了乳腺癌治疗的潜在治疗标.
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