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1.西藏民族大学医学院西藏高原相关疾病分子机制与干预研究重点实验室, 陕西 咸阳 712082
2.东南大学公共卫生学院营养与食品卫生学系环境医学工程教育部重点实验室,江苏 南京 210009
3.西安交通大学第一附属医院,陕西 西安 710061
4.陕西省宝鸡市凤县医院,陕西 宝鸡 721700
WANG Shaokang, E-mail:shaokangwang@seu.edu.cn
Received:12 February 2026,
Revised:2026-03-13,
Accepted:23 March 2026,
Online First:25 March 2026,
移动端阅览
SHAO Li, TAO Ke, WEI Li, et al. Mechanism of Ellagic Acid in Ameliorating Bleomycin-Induced Lung Injury[J/OL]. Journal of Sun Yat-sen University(Medical Sciences), 2026, 1-14.
SHAO Li, TAO Ke, WEI Li, et al. Mechanism of Ellagic Acid in Ameliorating Bleomycin-Induced Lung Injury[J/OL]. Journal of Sun Yat-sen University(Medical Sciences), 2026, 1-14. DOI: 10.11714/jsysu.med.YX20260027.
目的
2
探讨鞣花酸(EA)对博来霉素(BLM)诱导的小鼠肺纤维化及相关肺功能障碍的保护作用,并阐明其与 白细胞介素(IL)-17/核因子(NF)-κB/基质金属蛋白酶(MMP)9 信号轴的调控关系。
方法
2
以雄性C57BL/6J小鼠为实验动物,采用气管内注射BLM进行肺纤维化动物造模。分别使用IL-17中和抗体、Ixekizumab、SB-3CT、PDTC或EA干预,以调控IL-17/NF-κB/MMP9信号轴。通过HE、Masson及天狼星红染色观察肺组织病理变化;采用肺功能测试(PFT)评估肺功能;Western blot和qRT-PCR检测相关蛋白及基因表达。结合网络药理学预测EA作用靶点,通过STRING数据库和Cytoscape构建蛋白互作网络,并采用分子对接验证EA与核心靶点的结合能力。
结果
2
博来霉素可诱导小鼠出现明显肺纤维化及肺功能障碍,显著升高促炎因子IL-17水平,并通过激活 转录因子NF-κB p65上调促纤维化因子MMP9的表达。抑制 IL-17/NF-κB/MMP9 信号轴可明显减轻肺纤维化程度。EA干预可显著抑制博来霉素诱导的 IL-17 升高,阻断 NF-κB/MMP9 通路激活,进而减轻肺纤维化病变并改善肺功能。
结论
2
EA可通过抑制 IL-17/NF-κB/MMP9 信号通路介导的炎症与纤维化反应,有效改善博来霉素诱导的小鼠肺纤维化及肺功能障碍。
Objective
2
To investigate the protective effect of ellagic acid (EA) against bleomycin (BLM)-induced pulmonary fibrosis and associated pulmonary function impairment in mice, and to elucidate its relationship with the regulation of the interleukin(IL)-17/ nuclear factor (NF)-κB/ matrix metalloproteinase (MMP)9 signaling axis.
Methods
2
A pulmonary fibrosis model was established in male C57BL/6J mice via intratracheal BLM injection. Interventions included IL-17 neutralizing antibody, Ixekizumab, SB-3CT, PDTC, or EA were used to modulate the IL-17/NF-κB/MMP9 signaling axis. Pathological changes in lung tissue were observed via HE, Masson, and Sirius red staining. Pulmonary function was assessed using a pulmonary function test (PFT). Western blot and qRT-PCR were employed to detect related protein and gene expression. Network pharmacology was utilized to predict the potential targets of EA. A protein-protein interaction (PPI) network was constructed using the STRING database and Cytoscape. Molecular docking was performed to validate the binding capability of EA to core targets.
Results
2
BLM successfully induced obvious pulmonary fibrosis and lung dysfunction in mice, significantly elevating the level of the pro-inflammatory cytokine IL-17. This was associated with the activation of the transcription factor NF-κB p65, leading to the upregulation of the pro-fibrotic factor MMP9. Inhibition of the IL-17/NF-κB/MMP9 signaling axis markedly alleviated the degree of pulmonary fibrosis. EA intervention significantly suppressed the BLM-induced increase in IL-17, blocked the activation of the NF-κB/MMP9 pathway, and consequently reduced lung fibrotic lesions and improved pulmonary function.
Conclusion
2
EA may effectively ameliorate BLM-induced pulmonary fibrosis and lung dysfunction in mice, likely by inhibiting the inflammatory and fibrotic responses mediated through the IL-17/NF-κB/MMP9 signaling pathway.
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