首页> 外文期刊>Biochemical Pharmacology >Overcoming interferon (IFN)-gamma resistance ameliorates transforming growth factor (TGF)-beta-mediated lung fibroblast-to-myofibroblast transition and bleomycin-induced pulmonary fibrosis
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Overcoming interferon (IFN)-gamma resistance ameliorates transforming growth factor (TGF)-beta-mediated lung fibroblast-to-myofibroblast transition and bleomycin-induced pulmonary fibrosis

机译:克服干扰素(IFN)-Gamma抗性改善转化生长因子(TGF) - 介导的肺成纤维细胞 - 肌纤维细胞转变和博莱霉素诱导的肺纤维化

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摘要

Abnormal activation of transforming growth factor (TGF)-beta is a common cause of fibroblast activation and fibrosis. In bleomycin (BLM)-induced lung fibrosis, the marked expression of phospho-Src homology-2 domain containing phosphatase (SHP) 2, phospho-signal transducer and activator of transcription (STAT) 3, and suppressor of cytokine signaling (SOCS) 3 was highly associated with pulmonary parenchymal lesions and collagen deposition. Human pulmonary fibroblasts differentiated into myofibroblasts exhibited activation of SHP2, SOCS3, protein inhibitor of activated STAT1, STAT3, interleukin (IL)-6, and IL-10. The significant retardation of interferon (IFN)-gamma signaling in myofibroblasts was revealed by the decreased expression of phospho-STAT1, IFN-gamma-associated genes, and IFN-gamma-inducible protein (IP) 10. Microarray analysis showed an induction of fibrotic genes in TGF-beta 1-differentiated myofibroblasts, whereas IFN-gamma-regulated anti-fibrotic genes were suppressed. Interestingly, BIBF 1120 treatment effectively inhibited both STAT3 and SHP2 phosphorylation in TGF-beta 1-differentiated myofibroblasts and BLM fibrotic lung tissues, which was accompanied by suppression of fibroblastmyofibroblast transition. Moreover, the combined treatment of BIBF 1120 plus IFN-gamma or SHP2 inhibitor PHPS1 plus IFN-gamma markedly reduced TGF-beta 1-induced alpha-smooth muscle actin and further ameliorated BLM lung fibrosis. Accordingly, myofibroblasts were hyporesponsiveness to IFN-gamma, while blockade of SHP2 contributed to the anti fibrotic efficacy of IFN-gamma.
机译:转化生长因子(TGF)的异常活化 - β-β是成纤维细胞活化和纤维化的常见原因。在博来霉素(BLM)诱导的肺纤维化中,含磷-SRC同源2结构域的显着表达含磷酶(SHP)2,磷光信号传感器和转录的活化剂(统计学)3,抑制细胞因子信号传导(SOC)3与肺实质病变和胶原沉积高度相关。分化成肌纤维细胞的人肺成纤维细胞表现出SHP2,SOCS3,活化STAT1,Stat3,白细胞介素(IL)-6和IL-10的蛋白质抑制剂的活化。通过降低磷酸-TAT1,IFN-γ-相关基因的表达和IFN-γ-诱导蛋白(IP)10的表达,揭示了肌纤维细胞中的干扰素(IFN)信号传导的显着延迟。微阵列分析表明纤维化诱导TGF-β1分化的肌纤维细胞的基因,而IFN-Gamma-调节的抗纤维化基因被抑制。有趣的是,BIBF 1120治疗有效地抑制了TGF-β1分化的肌纤维细胞和BLM纤维化肺组织中的STAT3和SHP2磷酸化,其伴随着抑制纤维细胞纤维细胞转变。此外,BiBF 1120加IFN-Gamma或SHP2抑制剂PHPS1加上IFN-Gamma的组合治疗明显减少了TGF-β1诱导的α-平滑肌肌动蛋白,进一步改善的BLM肺纤维化。因此,肌纤维细胞对IFN-Gamma的低反对性,而SHP2的阻断有助于IFN-γ的抗纤维化效果。

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