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Acute Myocardial Infarction in Rats
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Serum-Derived Extracellular Vesicles Protect Against Acute Myocardial Infarction by Regulating miR-21/PDCD4 Signaling

Huanyu Gu1, Zhuyuan Liu1, Yongqin Li2

  • 1Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.

Frontiers in Physiology
|April 21, 2018
PubMed

Insights

Serum extracellular vesicles (EVs) protect against acute myocardial infarction (AMI) by reducing heart cell death. A specific microRNA, miR-21, within these EVs is key to this protective effect, offering a new therapeutic avenue for AMI.

Area of Science:

  • Cardiovascular Research
  • Cell Biology
  • Biomedical Engineering

Background:

  • Acute myocardial infarction (AMI) is a major global health concern.
  • Extracellular vesicles (EVs) in serum show potential for treating myocardial infarction (MI).
  • The specific role of serum EVs and their microRNAs in AMI remains largely unknown.

Purpose of the Study:

  • To investigate the protective effects of serum EVs against AMI.
  • To determine if specific microRNAs mediate the cardioprotective actions of serum EVs in AMI.
  • To identify the molecular mechanisms underlying serum EV-mediated protection in AMI.

Main Methods:

  • Utilized cellular and mouse models of AMI.
  • Administered serum EVs and assessed their impact on cardiomyocyte apoptosis and infarct size.
  • Investigated the role of miR-21 by inhibiting its function and analyzing its target gene, PDCD4.

Main Results:

  • Serum EVs significantly reduced cardiomyocyte apoptosis and infarct size in AMI models.
  • Inhibition of miR-21 diminished the protective effects of serum EVs.
  • Serum EVs increased miR-21 levels in the heart post-AMI, targeting PDCD4 expression.

Conclusions:

  • Serum EVs exert significant protective effects against acute myocardial infarction.
  • miR-21 is a crucial mediator of serum EV-driven cardioprotection in AMI.
  • Serum EVs represent a promising therapeutic strategy for managing AMI.
Keywords:
PDCD4acute myocardial infarctioncardiomyocytes apoptosisextracellular vesiclesmiR-21

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