IL-27调控TGF-β/Smad通路在博来霉素诱导肺纤维化中的作用
IL-27 Alleviates the Bleomycin-induced Pulmonary Fibrosis through Regulating TGF-β/Smad Signaling Pathway
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摘要: [摘要]目的 在博来霉素诱导肺纤维化小鼠肺组织中, 探讨IL-27是否通过TGF-β/Smad信号通路抑制肺纤维化.方法 将40只雄性C57/BL6小鼠随机分为:空白对照组(A组),博来霉素组(B组),博来霉素+白介素27组(C组),博来霉素+白介素27抗体组(D组),每组10只.于造模后第7、28天每组各处死5只小鼠,取右肺组织用Western Blot 的方法检测TGF-βR1、Smad1、Smad3蛋白的表达.结果(1)博来霉素诱导肺纤维化模型中,7 d、28 d肺组织均有TGF-βR1表达升高,IL-27治疗后降低TGF-βR1表达(P<0.05);(2)D组p-Smad1、p-Smad3表达量在造模后7 d、28 d均最高,C组在造模后7 d表达量少于B组(P<0.05).结论 外源性IL-27可能通过抑制TGF-β/Smad通路相关蛋白的磷酸化减轻肺纤维化.
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关键词:
- [关键词]IL-27 /
- 肺纤维化 /
- TGF-β/Smad信号通路
Abstract: [Abstract]Objective To explore whether IL-27 inhibited the pulmonary fibrosis through regulating the expression of TGF-β/Smad signaling pathway in the bleomycin-induced pulmonary fibrosis model. Methods Forty male C57/BL6 mice were randomly divided into normal control group(group A), bleomycin-induced pulmonary fibrosis group (group B), bleomycin+IL-27 group(group C)and bleomycin+IL-27 antibody group (group D) with 10 in each. Five mice in each group were sacrificed on days 7 and 28 after with intratracheal bleomycin. TGF-βR1, Smad1 and Smad3 in right lung tissue were measured by Western Blot. Results 1. In the bleomycin-induced pulmonary fibrosis model, the expression of TGF-βR1 was higher on days 7 and 28, which was inhibited by IL-27. 2. The expressions of p-Smad1 and p-Smad3 were highest in group D on days 7 and 28, but were lower in group C on day 7 than those in group B. Conclusion Exogenous IL-27 might alleviate pulmonary fibrosis through inhibiting the related protein phosphorylation in TGF-β/Smad signaling pathway.
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