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Hepatology:制癌蛋白M在小鼠模型中通过调控肝星状细胞和巨噬细胞导致肝纤维化

2017-08-23 MedSci MedSci原创

近日,肝病领域权威杂志—Hepatology发表了一篇文章,证明OSM在慢性肝损伤时,通过调节巨噬细胞的激活,发挥促纤维化作用。

肝纤维化是可逆的创伤修复反应,然而,多数慢性肝炎患者存在不同程度的肝纤维化。制癌蛋白M(OSM)通过诱导组织抑制剂金属蛋白酶1(TIMP-1)表达,在急性肝损伤的恢复过程中发挥重要的作用,然而,其在慢性肝损伤中的作用尚未阐明。

近日,肝病领域权威杂志-Hepatology发表了一篇文章,证明OSM在慢性肝损伤时,通过调节巨噬细胞的激活,发挥促纤维化作用。在慢性肝炎小鼠模型中,敲除小鼠OSM基因,肝纤维化减轻。相反,在正常小鼠肝脏中通过尾静脉液压注射法,持续过表达OSM基因,导致严重肝纤维化,但并未引起肝细胞损伤、坏死。这一结果表明,在发生肝炎后,OSM参与肝纤维化发生、发展。共同培养肝星状细胞(HSC)和肝巨噬细胞(HMs)的原代细胞,OSM上调HMs中转化生长因子和血小板衍生生长因子等因子基因表达,同时诱导HSCs中的TIMP-1基因表达,提示OSM在促进胶原沉积过程中发挥协同作用。流式细胞术(FACS)分析显示,骨髓源性单核细胞/巨噬细胞对OSM具有应答性,OSM可促进这些细胞发挥促纤维化作用。进一步分析,我们发现,通过氯丙酸酯或趋化因子抑制剂耗竭HMs或阻断HMs,阻止了OSM诱导的纤维化。

此研究结果表明:OSM通过调节HMs和HSC的活动在肝纤维化中发挥重要作用。OSM是肝纤维化治疗过程中的一个有希望的治疗靶点。

原始出处:

Matsuda M, Tsurusaki S, Miyata N, et al. Oncostatin M causes liver fibrosis by regulating cooperation between hepatic stellate cells and macrophages in mice. Hepatology, 2017 Aug 5. doi: 10.1002/hep.29421.

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    2017-08-25 gwc384
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