血小板衍生生长因子受体β(PDGFRβ)在肝纤维化中发挥重要作用,与肝星状细胞(HSC)的活化密切相关。以前,通过对PDGFRβ亲和层析进行建模,我们发现gomisinD可以靶向PDGFRβ。然而,gomisinD是否通过靶向PDGFRβ具有抗纤维化作用尚不清楚.在这项研究中,在体内和体外评估了gomisinD对肝纤维化的影响。培养HSC细胞系和原代HSC,在功能上我们发现gomisinD促进HSC凋亡,抑制HSC的活化和增殖。建立雄性BALB/c小鼠肝纤维化模型,证实gomisinD(特别是50mg/kg)可通过抑制HSCs活化改善肝纤维化。此外,gomisinD与PDGFRβ具有良好的结合能力(KD=3.3e-5M)。机械上,gomisinD通过靶向PDGFRβ调节PDGF-BB/PDGFRβ信号通路,进一步抑制HSC激活,随后抑制炎症因子,最终改善CCl4诱导的肝纤维化。总的来说,gomisinD可抑制HSC增殖和活化,促进HSC凋亡,并通过靶向PDGFRβ和调节PDGF-BB/PDGFRβ信号通路减轻CCl4诱导的肝纤维化。本研究为抗肝硬伤治疗提供了一种新药,并阐明了gomisinD通过靶向PDGFRβ抗HSC活化的更深层次机制。
Platelet-derived growth factor receptor β (PDGFRβ) plays an important role in hepatic fibrosis and is closely associated with hepatic stellate cells (HSCs) activation. Previously, by modeling PDGFRβ affinity chromatography, we found that gomisin D can target PDGFRβ. However, whether gomisin D has anti-fibrosis effects through targeting PDGFRβ remained unclear. In this study, the effect of gomisin D on hepatic fibrosis was evaluated in vivo and vitro. HSC cell lines and primary HSC were cultured and functionally we found that gomisin D promotes HSC apoptosis, inhibits HSCs activation and proliferation. A male BALB/c mouse liver fibrosis model was established to comfirm gomisin D (especially in 50 mg/kg) could improve liver fibrosis by inhibiting HSCs activation. In addition, gomisin D had a good binding ability with PDGFRβ (KD = 3.3e-5 M). Mechanically, gomisin D regulated PDGF-BB/PDGFRβ signaling pathway by targeting PDGFRβ, further more inhibited HSC activation, subsequently inhibited inflammatory factors, ultimately improved CCl4-induced liver fibrosis. Overall, gomisin D could inhibit HSC proliferation and activation, promote HSC apoptosis, and alleviate CCl4-induced hepatic fibrosis by targeting PDGFRβ and regulating PDGF-BB/PDGFRβ signaling pathway. This study provides a new drug for anti-liver firbosis therapy, and elucidates the deeper mechanism of gomisin D against HSCs activation by targeting PDGFRβ.