武汉大学中南医院呼吸与危重症医学科 湖北 武汉 430071
杨帆,女,1991—,医学硕士,主要从事肺纤维化的发生及机制研究,E‑mail:2022203030024@whu.edu.cn
程真顺,男,1970—,医学博士,教授,博士生导师,主要从事肺纤维化的发生及机制研究,E‑mail:zhenshun_cheng@126.com
收稿:2024-12-26,
纸质出版:2025-12-25
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杨帆,彭梅婷,余露等.MFAP5通过激活TGF‑β1/Smad信号通路加重博来霉素诱导的肺纤维化[J].武汉大学学报(医学版),2025,46(12):1523-1528.
YANG Fan,PENG Meiting,YU Lu,et al.MFAP5 aggravates bleomycin‑induced pulmonary fibrosis through activation of the TGF‑β1/Smad signaling pathway[J].Medical Journal of Wuhan University,2025,46(12):1523-1528.
杨帆,彭梅婷,余露等.MFAP5通过激活TGF‑β1/Smad信号通路加重博来霉素诱导的肺纤维化[J].武汉大学学报(医学版),2025,46(12):1523-1528. DOI: 10.14188/j.1671-8852.2024.1021.
YANG Fan,PENG Meiting,YU Lu,et al.MFAP5 aggravates bleomycin‑induced pulmonary fibrosis through activation of the TGF‑β1/Smad signaling pathway[J].Medical Journal of Wuhan University,2025,46(12):1523-1528. DOI: 10.14188/j.1671-8852.2024.1021.
目的
2
探讨微纤维相关蛋白5(MFAP5)在博来霉素(BLM)诱导的小鼠肺纤维化中的作用及分子机制。
方法
2
建立BLM诱导的C57BL/6小鼠肺纤维化模型,使用重组鼠MFAP5蛋白(rmMFAP5)干预并评估其影响。分析MFAP5过表达(MFAP5‑OE)的小鼠肺成纤维细胞,检测纤维化相关分子和TGF‑β1/Smad信号通路的活性。
结果
2
在体内实验中,rmMFAP5显著加重BLM诱导的小鼠体质量下降及肺纤维化,并增加细胞外基质蛋白的表达。在体外,MFAP5过表达显著上调成纤维细胞中α平滑肌肌动蛋白(α‑SMA)及细胞外基质蛋白的表达,促进成纤维细胞活化和基质合成。机制研究发现,MFAP5通过上调TGF‑β1、Smad2/3及磷酸化Smad2/3水平增强TGF‑β信号活性,抑制TGF‑β通路(SB525334)可显著减少Ⅰ型胶原表达。
结论
2
MFAP5通过激活TGF‑β1/Smad信号通路,促进肺成纤维细胞活化和基质合成,加重BLM诱导的肺纤维化。
Objective
2
To investigate the role and molecular mechanism of microfibril‑associated protein 5 (MFAP5) in bleomycin (BLM)‑induced pulmonary fibrosis in mice.
Methods
2
A pulmonary fibrosis model was established in C57BL/6 mice using BLM
and the effects of recombinant MFAP5 protein (rmMFAP5) intervention were evaluated. Primary mouse lung fibroblasts with MFAP5 overexpression (MFAP5‑OE) were analyzed to assess fibrosis‑related molecules and TGF‑β1/Smad signaling activity.
Results
2
In vivo
rmMFAP5 significantly exacerbated BLM‑induced weight loss and pulmonary fibrosis while increasing extracellular matrix proteins.
In vitro
MFAP5 overexpression markedly upregulated α‑SMA and extracellular matrix proteins
promoting fibroblast activation and matrix synthesis. Mechanistically
MFAP5 enhanced TGF‑β1 signaling by upregulating TGF‑β1
Smad2/3
and phosphorylated Smad2/3 levels. Pharmacological inhibition of TGF‑β1 signaling (SB525334) significantly reduced MFAP5‑induced type I collagen expression.
Conclusion
2
MFAP5 promotes fibroblast activation and extracellular matrix synthesis via the TGF‑β1/Smad pathway
exacerbating BLM‑induced pulmonary fibrosis.
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