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低密度脂蛋白受体是甲状腺瘤细胞侵略性的关键驱动因素
Giovanna Revilla1,2, Lara Ruiz-Auladell1, Núria Fucui Vallverdú1
1Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau, Institut d'Investigació Biomèdica (IIB) Sant Pau, 08041 Barcelona, Spain.
International journal of molecular sciences
|July 14, 2023
概括
低密度脂蛋白 (LDL) 可以通过调节LDL受体 (LDLR) 和MAPK通路来加速乳头甲状腺癌 (PTC) 的攻击性,特别是在BRAF V600E突变细胞中. 向LDLR提供了一个潜在的治疗策略,用于攻击性的PTC.
科学领域:
- 在瘤学瘤学.
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 低密度脂蛋白 (LDL) 与乳头甲状腺癌 (PTC) 的攻击性有关.
- MAPK信号通路,特别是BRAF V600E突变,与更具攻击性的PTC相关.
- 在PTC中,通过LDL受体 (LDLR) 的LDL和MAPK通路之间的相互作用尚未完全理解.
研究的目的:
- 为了调查LDL是否通过MAPK途径增强PTC攻击性.
- 分析LDL和LDLR在带有和没有BRAF V600E突变的PTC细胞系中的作用.
- 探索潜在的治疗策略,以LDLR和下游信号为目标.
主要方法:
- 对LDLR,PI3K-AKT和RAS/RAF/MAPK (MEK) /ERK的西部斑分析.
- 细胞增殖的MTT测定和细胞迁移的伤口愈合测定.
- 度和对LDL吸收的对焦分析,siRNA对LDLR的淘汰,以及BRAF V600E与vemurafenib的调制.
主要成果:
- 通过LDL调节的LDLR是细胞系特异性的,与TPC1.1相比,BCPAP (BRAF V600E) 的吸收和扩散增加.
- 在TPC1和BCPAP细胞中,LDL暴露调节了MAPK通路激活 (p-ERK) 和细胞增殖/迁移.
- siRNA对LDLR和BRAF V600E抑制降低了增殖,证实了LDLR,MAPK和BRAF V600E之间的联系.
结论:
- LDLR的表达和调节对于调节LDL对PTC细胞行为的影响至关重要.
- RAS/RAF/MAPK (MEK) /ERK通路是PTC中LDL信号的关键下游媒介.
- 准LDLR和MAPK通路为攻击性PTC提供了一个有希望的治疗途径,特别是那些具有BRAF V600E突变的人.
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