富含白的α-2-糖蛋白 1 通过人体表皮生长因子受体3信号传递促进转移性结肠直肠癌的生长
Moeez Rathore1, Kimberly Curry1, Wei Huang2
1Department of Surgery, Case Western Reserve University, Cleveland, Ohio; Case Comprehensive Cancer Center, Case Western Reserve University, Cleveland, Ohio.
Gastroenterology
|October 11, 2024
概括
富含白的α-2-糖蛋白1 (LRG1) 在肝脏微环境中激活人体表皮生长因子受体3 (HER3),促进转移性结直肠癌 (mCRC) 的生长. 针对这种新的LRG1-HER3通路为mCRC提供了一个新的治疗策略.
科学领域:
- 在瘤学瘤学.
- 癌症生物学 癌症生物学
- 分子信号传输的方法
背景情况:
- 转移性结直肠癌 (mCRC) 肝脏转移是一个重大的治疗挑战.
- 规范的人体表皮生长因子受体3 (HER3) 信号阻断的临床疗效有限.
- 肝脏的微环境可能通过神经素独立的途径激活HER3,这表明了新的治疗点.
研究的目的:
- 阐明HER3激活在结直肠癌肝转移中的新机制.
- 为了确定肝脏分泌的因子,调解与结直肠癌细胞的交叉交流.
- 探索针对mCRC中的非正规HER3激活的新治疗策略.
主要方法:
- 对患者衍生的肝脏内皮细胞 (ECs) 的蛋白质组分析,以确定分泌的因素.
- 使用小鼠mCRC模型进行体外和体内研究,以评估已识别的因素的功能作用.
- 基因和药理干预以绘制非正规的HER3信号通路.
主要成果:
- 通过EC分泌的富含白蛋白的α-2-糖蛋白1 (LRG1) 被确定为一种新型的HER3配体.
- LRG1独立于神经调节素激活HER3,促进CRC在肝脏中的生长.
- 在临床前模型中,阻断LRG1损害了mCRC外生和改善了生存率.
- PI3K-PDK1-RSK-eIF4B轴调解下游信号,与传统的HER3封锁不同.
结论:
- LRG1是通过非正规的HER3激活来进行肝脏-mCRC交叉的关键调解者.
- LRG1-HER3信号轴代表了mCRC的一个有前途的治疗标.
- 这种途径也可能与治疗其他类型的肝转移相关.
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