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Herbal Munziq Ameliorates Myocardial Ischemia-Reperfusion Injury by Inhibiting Inflammation
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Herbal Munziq Ameliorates Myocardial Ischemia-Reperfusion Injury by Inhibiting Inflammation

Published on: January 10, 2025

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Down-Regulation of miR-327 Alleviates Ischemia/Reperfusion-Induced Myocardial Damage by Targeting RP105

Ying Yang1, Jun Yang2, Xiao-Wen Liu1

  • 1Institute of Cardiovascular Diseases, China Three Gorges University, Yichang, China.

Cellular Physiology and Biochemistry : International Journal of Experimental Cellular Physiology, Biochemistry, and Pharmacology
|September 10, 2018
PubMed
Abstract

Insights

Reducing miR-327 levels protects the heart from injury during myocardial ischemia/reperfusion. This involves up-regulating RP105, reducing inflammation, and improving outcomes in MIRI rats.

Area of Science:

  • Cardiovascular Biology
  • Molecular Medicine
  • Inflammation Research

Background:

  • MicroRNAs (miRNAs) are crucial in myocardial ischemia/reperfusion injury (MIRI), affecting inflammation, apoptosis, and angiogenesis.
  • miR-327 is upregulated in MIRI, and RP105, a potential target, is cardioprotective.
  • The regulatory relationship between miR-327 and RP105 in MIRI was previously uncharacterized.

Purpose of the Study:

  • To investigate the regulatory effect of miR-327 on RP105 protein expression in a rat model of MIRI.
  • To elucidate the underlying molecular mechanisms of miR-327's action in MIRI.

Main Methods:

  • A rat model of MIRI was established.
  • Rats were treated with saline, miR-327 inhibitors (Ad-miR-327-i), or miR-327 mimics (Ad-miR-327).
  • Myocardial and plasma samples were analyzed for RP105 expression, inflammation markers, and infarct size.

Main Results:

  • miR-327 levels increased significantly in MIRI myocardium and plasma.
  • miR-327 directly down-regulated RP105 expression.
  • Inhibition of miR-327 up-regulated RP105, suppressed the TLR4/TLR2-MyD88-NF-κB pathway, reduced infarct size, and alleviated myocardial damage and inflammation.

Conclusions:

  • Down-regulation of miR-327 confers cardioprotection against MIRI.
  • This protective effect is mediated by RP105 up-regulation and subsequent reduction in inflammation.
  • miR-327 represents a potential molecular therapeutic target for MIRI.
Keywords:
InflammationMyocardial ischemia/reperfusion injuryRP105TLR2TLR4miR-327

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