Roxithromycin attenuates bleomycin-induced pulmonary fibrosis by targeting senescent cells

• 作者: Xuan Zhang Ying Dong Wan-chen Li Bi-xi Tang Jia Li Yi Zang
• 来源期刊: 中国药理学报（英文版）
• 年，卷（期）: 2021,（12）
• 所属期刊栏目: Pulmonary Pharmacology
• 页码范围: 2058-2068
• 页数: 11页
• 语种: 英文

摘要

Idiopathic pulmonary fibrosis (IPF) is an aging-associated disease with a poor prognosis.Emerging evidence has revealed that targeting senescent cells may be a potential treatment for IPF.In this study,we aimed to explore whether roxithromycin (RXM) can improve lung fibrosis by targeting senescent cells.First,we confirmed the ability of RXM to selectively kill senescent cells by inducing apoptosis and inhibiting the expression of senescence-associated secretory phenotype (SASP) factors,suggesting the potential role of RXM as a "senolytic" and "senomorphic" drug.Next,we observed that TGF-β-and senescent cell-induced lung fibroblast activation was inhibited by RXM treatment,which prompted us to further investigate its effect in vivo.In a mouse model of bleomycin (BLM)-induced pulmonary fibrosis,RXM was shown to attenuate lung injury,inflammation,and fibrosis.Furthermore,the senescent phenotype of lung tissues induced by BLM was significantly diminished after RXM administration,indicating the potential of RXM as an antifibrotic and antisenescent agent.Interestingly,NADPH oxidase 4 (NOX4),implicated in lung fibrosis and cell senescence,was shown to be inhibited by RXM treatments.The antifibroblast activation and antisenescent effects of RXM were abolished in NOX4 knockdown cells,demonstrating that RXM may ameliorate BLM-induced pulmonary fibrosis by targeting senescent cells mediated by the NOX4 pathway.Collectively,these data demonstrated that RXM may be a potential clinical agent for IPF and further supported the notion that targeting cellular senescence is a promising treatment for progressive age-related disease.