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- W3154686738 abstract "Abstract To explore the impact and mechanism of human mesenchymal stem cells (hMSCs) on the angiogenesis of cardiac microvascular endothelial cells (CMECs) after ischemia insult. Exosomes derived from hMSCs (hMSCs‐Exo) were identified by Western blotting and labeled by PHK‐67. CMECs were isolated from rat myocardial tissues. After hypoxic treatment, CMECs were cultured with hMSCs and exosome inhibitor (GW4869) or transfected with si‐COL4A1 + miR‐543 inhibitor. CMEC proliferation, migration, invasion, and angiogenesis were examined. Target genes of miR‐543 were predicted and then were identified by dual luciferase assay. Myocardial infarction (MI) rat model established by suture occlusion was intravenously injected with hMSCs‐Exo. Fluorescence microscope was applied to visualize exosomes in myocardial tissues. Infarction volume and pathologies of myocardial tissues were observed. Ki‐67 and miR‐543 expressions were detected. The isolated hMSC‐Exo expressed TSG101, HSP70, and CD63. Hypoxia‐treated CMECs cultured with hMSCs exhibited high proliferation, migration, invasion, and angiogenesis ability, while incubation with exosome inhibitor GW4969 offset the promoting effects of hMSCs on the proliferation, migration, invasion, and angiogenesis of CMECs. hMSCs transfected with miR‐543 inhibitor brought CMECs weak viability and angiogenesis ability. CMECs transfected with si‐COL4A1 and miR‐543 inhibitor showed low proliferation, migration, invasion, and angiogenesis compared to those transfected with si‐COL4A1 alone. hMSCs‐Exo entered the myocardial tissues of MI rats. Injection of hMSCs‐Exo in MI rats diminished infarction size, attenuated MI‐induced injuries, and increased Ki‐67 expression. hMSCs‐Exo facilitates the proliferation, migration, invasion, and angiogenesis of CMECs through transferring miR‐543 and downregulating COL4A1 expression." @default.
- W3154686738 created "2021-04-26" @default.
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- W3154686738 date "2021-05-11" @default.
- W3154686738 modified "2023-10-11" @default.
- W3154686738 title "<scp>miR</scp>‐543 in human mesenchymal stem cell–derived exosomes promotes cardiac microvascular endothelial cell angiogenesis after myocardial infarction through <scp>COL4A1</scp>" @default.
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- W3154686738 doi "https://doi.org/10.1002/iub.2474" @default.
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