在黑色素瘤可塑性中,MITF和TFE3的对抗作用
Jeremy Chang1, Katelyn R Campbell-Hanson1, Marion Vanneste2,3
1Department of Surgery, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
bioRxiv : the preprint server for biology
|July 19, 2024
概括
黑色素瘤细胞切换状态,推动癌症的进展. 研究人员发现TFE3驱动入侵,而MITF通过mTORC1途径抑制它,揭示了黑色素瘤可塑性的关键机制.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 细胞生物学 细胞生物学
背景情况:
- 黑色素瘤表现出可塑性,在黑色素细胞和中细胞状态之间切换.
- 这种可塑性有助于瘤异质性,进展和治疗耐药性.
- 微相关的转录因子 (MITF) 促进了黑色细胞状态,但介质细胞状态的调节者是未知的.
研究的目的:
- 为了确定黑色素瘤中介质细胞状态的关键调节者.
- 阐明导致黑色素瘤细胞状态可塑性的分子机制.
- 了解MITF如何影响繁殖和侵入性表型之间的切换.
主要方法:
- 研究了TFE3和非正规的mTORC1通路在黑色素瘤中的作用.
- 在黑色素瘤细胞系和瘤中评估了TFE3表达和转移潜力.
- 在MITF低的黑色素瘤细胞中利用基因删除 (TFE3).
- 检查了MITF对FNIP1,FNIP2和FLCN表达的调节.
主要成果:
- 确定TFE3表达是黑色素瘤转移性表型的驱动因素.
- 在MITF低的黑色素瘤细胞中,TFE3的删除显著减少了迁移和转移.
- 通过激活非正规的mTORC1通路,MITF抑制了中细胞表型.
- 这一途径促进了TFE3的降解,从而抑制了侵入性.
结论:
- TFE3和非正规的mTORC1通路是黑色素瘤细胞可塑性的关键调节者.
- MITF通过mTORC1通路对抗TFE3驱动的入侵性.
- 这一途径代表了控制黑色素瘤进展和转移的潜在治疗标.
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