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- W4256673033 abstract "Abstract Purpose: Human trophoblast stem cells (TSC)have been confirmed to play a cardioprotective role in heart failure. However, whether trophoblast stem cell derived exosomes (TSC-Exos) can protect cardiomyocytes from doxorubicin (Dox) induced injury remains unclear. Methods: In the present study, TSC-Exos were isolated from the supernatant of Human Trophoblasts using the ultracentrifugation method and characterized by transmission electron microscope and western blotting.In vitro, primary cardiomyocytes subjected to Dox were treated with TSC-Exos, miR-200b mimic or miR-200b inhibitor. Cell apoptosis was observed by flow cytometry and immunoblotting. In vivo, mice were intraperitoneally injected into Dox to establish a heart failure model. Then they received a tail injection of either PBS, adeno-associated virus (AAV)-vector, AAV-miR-200b-inhibitor or TSC-Exosfor different groups. Then cardiac function, cardiac fibrosis and cardiomyocyte apoptosis among groups were evaluated and downstream molecular mechanism was explored. Results: TSC-Exos and miR-200b inhibitor both decreased primary cardiomyocytes apoptosis. Similarly, mice receivingTSC-Exos andAAV-miR-200b-inhibitor have improved cardiac function, accompanied by reduced apoptosis and inflammation. Bioinformatic prediction and luciferase reporter results confirmed that Zeb1 was a downstream target of miR-200b, which had an antiapoptotic effect. Conclusion: TSC-ExosattenuatedDoxorubicin induced cardiac injury by playing an antiapoptosis and antiinflammation role. The underlying mechanism could be increased expression of Zeb1 by inhibiting miR-200b expression, due to the TSC-Exos treatment. This study sheds newlight on the application of MSC-Exo as a potential therapeutic tool for heart failure." @default.
- W4256673033 created "2022-05-12" @default.
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- W4256673033 date "2020-06-09" @default.
- W4256673033 modified "2023-09-23" @default.
- W4256673033 title "Human Trophoblasts-derived Exosomes Attenuate Doxorubicin Induced Cardiac Injury via Regulating Mir-200b and Downstream Zeb1" @default.
- W4256673033 doi "https://doi.org/10.21203/rs.3.rs-33305/v1" @default.
- W4256673033 hasPublicationYear "2020" @default.
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