SIRT1 inhibits TGF‐β‐induced endothelial‐mesenchymal transition in human endothelial cells with Smad4 deacetylation |
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| Authors: | Zhen Li Fei Wang Siyuan Zha Qing Cao Jing Sheng Shuyan Chen |
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| Affiliation: | 1. Department of Geriatrics, Xinhua Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China;2. Department of Geriatrics, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China |
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| Abstract: | Endothelial‐mesenchymal transition (EndMT) plays a pivotal role in organ fibrosis. This study examined the effect of SIRT1 on transforming growth factor beta (TGF‐β)‐induced EndMT in human endothelial cells (ECs) and its probable molecular mechanism. We assessed EndMT by immunofluorescence staining, quantitative real‐time polymerase chain reaction, Western blotting, and migration and invasion assays. Adenovirus was used to overexpress or knockdown SIRT1 in ECs. The regulatory relationship between SIRT1 and Smad4 was analyzed by coimmunoprecipitation assay. We found that SIRT1 was decreased in TGF‐β‐induced EndMT, and SIRT1 inhibited TGF‐β‐induced EndMT through deacetylating Smad4. Our findings suggest that SIRT1 has an important role in inhibiting EndMT by regulating the TGF‐β/Smad4 pathway in human ECs and, thus, protecting against fibrosis. |
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| Keywords: | endothelial‐mesenchymal transition (EndMT) fibrosis SIRT1 Smad4 TGF‐β |
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