白血病抑制因子 (LIF) 受体放大了肺纤维化中的纤维细胞的致病激活
Hung N Nguyen1,2, Yunju Jeong2,3,4, Yunhye Kim2,5
1Department of Medicine, Division of Rheumatology, Inflammation and Immunity, Brigham and Women's Hospital, Boston, MA 02115.
概括
准白血病抑制因子受体 (LIFR) 为纤维化肺部疾病提供了一种新的策略. 阻止LIFR可以降低纤维细胞激活和亲纤维细胞基因表达,同时解决多种疾病驱动因素.
科学领域:
- 肺部医学 肺部医学
- 细胞生物学 细胞生物学
- 纤维化研究 纤维化研究
背景情况:
- 纤维化会导致器官损伤,但针对TGFβ等单个上游激活剂的临床成功有限.
- 异形性肺纤维化 (IPF) 是一种常见的纤维化肺病,以纤维细胞激活为特征.
研究的目的:
- 研究白血病抑制因子受体 (LIFR) 作为肺纤维细胞激活的中央放大器在IPF中的作用.
- 探索LIFR作为一个潜在的治疗点,以减轻profibrotic反应.
主要方法:
- 在IPF肺纤维细胞和纤维细胞中分析LIF和LIFR表达.
- 通过LIF-LIFR轴研究TGFβ1,IL-4和IL-13对纤维细胞激活的影响.
- 在IPF纤维细胞中LIFR和LIF的体外抗体阻断和基因沉默.
- 在精密切割的肺切片中评估LIFR信号通路 (JAK2,STAT1) 和功能.
主要成果:
- 在IPF纤维细胞焦点中的肺肌纤维细胞和纤维细胞共同表达LIF和LIFR.
- TGFβ1上调了LIF表达,而LIF-LIFR轴对于纤维细胞对TGFβ1,IL-4和IL-13的益菌性反应至关重要.
- 抗体阻断和LIFR/LIF的沉默降低了亲纤维细胞基因诱导和纤维细胞激活.
- 通过JAK2和STAT1转换的LIFR信号,在IPF肺部切片中放大了profibrotic刺激.
结论:
- LIFR充当了一种自克林主放大器,维持IPF中的致病性纤维细胞激活.
- 准LIFR是一个有前途的治疗策略,可以同时减轻纤维化肺部疾病中的多个亲纤维化刺激.
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