在遗传性 papillary 细胞癌中发现的具有激活 N- 叶子突变的 MET 变异仍然需要连接体刺激
bioRxiv : the preprint server for biology
|November 15, 2023
概括
在遗传性乳头性细胞癌中,新的MET突变需要肝细胞生长因子 (HGF) 来激活,而不是其他受体氨酸激酶 (RTK) 变体. 这一发现表明,针对高基因基因依赖MET突变的向疗法.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 遗传学 遗传学 是一个
背景情况:
- 遗传性乳头性细胞癌 (HPRCC) 与肝细胞生长因子受体 (MET) 激酶域的突变有关,导致构成性激活.
- 非小细胞肺癌 (NSCLC) 中的MET突变涉及14个表原跳转,并且仍然需要连接体刺激.
研究的目的:
- 在HPRCC中识别和功能性地表征新的MET突变.
- 将HPRCC相关的MET突变的激活机制与NSCLC中的激活机制进行比较.
主要方法:
- 在158名HPRCC和2808名NSCLC患者样本中测序MET.
- 在体外功能测试以评估细胞转化和信号通路激活.
- 异种移植模型用于评估瘤生长潜力.
主要成果:
- 确定了10种不具特征的MET突变;HPRCC中的4种 (His1086Leu,Ile1102Thr,Leu1130Ser,Cis1125Gly) 导致细胞转化.
- N-叶MET变体 (His1086Leu,Ile1102Thr) 需要肝细胞生长因子 (HGF) 刺激,以强烈激活下游信号和细胞运动.
- 在异种移植模型中,Ile1102Thr突变促进了瘤生长.
- N-叶片MET变体触发了一个依赖于HGF的转录程序,与增加细胞移动性和入侵有关.
结论:
- 与HPRCC相关的N-叶片MET突变需要HGF刺激,不同于其他受体氨酸激酶 (RTK) 变异.
- 在这些情况下,瘤微环境中的HGF表达对瘤生长至关重要.
- 这些MET变种对MET抑制剂敏感,为向治疗铺平了道路.
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