Related Experiment Video
Updated: Jun 28, 2025
08:13
Purification and Transplantation of Myogenic Progenitor Cell Derived Exosomes to Improve Cardiac Function in Duchenne Muscular Dystrophic Mice
Published on: April 10, 2019
6.1K
Engineered Exosomes with Growth Differentiation Factor-15 Overexpression Enhance Cardiac Repair After Myocardial
Ailin Zou1, Tingting Xiao1, Boyu Chi1,2
1Department of Cardiology, the Affiliated Changzhou Second People's Hospital of Nanjing Medical University, Changzhou, Jiangsu, People's Republic of China.
International Journal of Nanomedicine
|April 12, 2024
Summary
Engineered exosomes overexpressing Growth Differentiation Factor-15 (GDF-15) promote cardiac repair after myocardial infarction. These GDF15-EVs protect heart cells by upregulating telomerase reverse transcriptase (TERT) and activating AMPK signaling.
Area of Science:
- Cardiovascular Research
- Regenerative Medicine
- Cell Biology
Background:
- Myocardial repair after acute myocardial infarction (AMI) is challenging due to limited myocardial cell regeneration.
- Cell-free therapies, including exosome transplantation, offer a promising strategy for treating myocardial injury.
- Engineered exosomes overexpressing Growth Differentiation Factor-15 (GDF-15) are being investigated for their therapeutic potential.
Purpose of the Study:
- To investigate the role of engineered exosomes overexpressing GDF-15 (GDF15-EVs) in cardiac repair following myocardial injury.
- To elucidate the molecular mechanisms underlying the protective effects of GDF15-EVs in cardiac repair.
Main Methods:
- H9C2 cells were engineered to overexpress GDF-15, and secreted exosomes (GDF15-EVs) were collected and identified.
- In vitro studies assessed apoptosis and autophagy in H2O2-injured H9C2 cells using Western blotting, TUNEL assay, and caspase assays.
- An in vivo rat model of AMI was used to evaluate the therapeutic effects of GDF15-EVs on infarct size, cardiac function, inflammation, and angiogenesis, followed by mRNA sequencing.
Main Results:
- GDF15-EVs inhibited apoptosis and promoted autophagy in injured H9C2 cells.
- In rats with AMI, GDF15-EVs reduced infarct area, improved cardiac function, decreased inflammatory cell infiltration, and enhanced angiogenesis.
- mRNA sequencing revealed upregulation of telomerase reverse transcriptase (TERT) and activation of AMPK signaling in GDF15-EVs-treated cells; TERT silencing impaired GDF15-EVs' protective effects.
Conclusions:
- Engineered GDF15-EVs exert protective effects against myocardial injury by upregulating TERT expression and activating the AMPK signaling pathway.
- GDF15-EVs demonstrate significant potential as a novel therapeutic strategy for treating acute myocardial infarction.
