在胆固醇中,RAGE是双管状反应介导纤维化症的关键调节剂
Wai-Ling Macrina Lam1,2, Gisela Gabernet3, Tanja Poth4
1Division of Signal Transduction and Growth Control, German Cancer Research Center (DKFZ), DKFZ-ZMBH Alliance, Heidelberg, Germany.
EMBO reports
|January 3, 2025
概括
胆道上皮质细胞上高级糖化终产品 (RAGE) 的受体驱动胆道反应和胆固醇中肝纤维化. 阻断RAGE可能为肝病提供新的治疗策略.
科学领域:
- 肝病学 肝病学是一种肝病学.
- 细胞生物学 细胞生物学
- 分子医学是分子医学.
背景情况:
- 导管反应 (DR) 是胆固醇性肝病的关键特征,与纤维化和肝衰竭有关.
- 晚期糖化终产品 (RAGE) 的受体在慢性肝损伤期间与DR有关.
- 在DR中RAGE的确切作用及其与纤维化的联系,特别是胆道上皮细胞 (BEC) 和肝星细胞 (HSC) 之间的相互作用,需要澄清.
研究的目的:
- 为了研究RAGE在DR中在胆固醇中对BECs的特定功能.
- 探索RAGE介导的DR与肝纤维化之间的关联.
- 阐明BECs和HSCs在促进纤维化的相互作用机制.
主要方法:
- 利用胆道血统追踪胆固醇性肝损伤的小鼠模型.
- 进行全转录组测序以分析基因表达变化.
- 进行了体外实验,以评估细胞相互作用.
主要成果:
- RAGE主要以BEC表达,并在DR中发挥重要作用.
- 特定于BEC的RAGE活性促进肝脏的亲纤维环境.
- 激活的BECs以RAGE-依赖的方式分泌Notch Ligand Jagged1,这向HSCs发出信号以增强纤维化.
结论:
- 特定于BEC的RAGE信号传递是胆固醇中DR和肝纤维化的关键驱动因素.
- 通过BECs的RAGE介导的Jagged1分泌激活HSC,从而促进纤维生成.
- 针对BECs的RAGE具有针对胆固醇性肝脏疾病的潜在治疗途径.
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