Annexin A5 reduces infarct size and improves cardiac function after myocardial ischemia-reperfusion injury by suppression of the cardiac inflammatory response

Sci Rep. 2018 Apr 30;8(1):6753. doi: 10.1038/s41598-018-25143-y.

Abstract

Annexin A5 (AnxA5) is known to have anti-inflammatory and anti-apoptotic properties. Inflammation and apoptosis are key processes in post-ischemic cardiac remodeling. In this study, we investigated the effect of AnxA5 on left ventricular (LV) function and remodeling three weeks after myocardial ischemia-reperfusion (MI-R) injury in hypercholesterolemic ApoE*3-Leiden mice. Using a mouse model for MI-R injury, we demonstrate AnxA5 treatment resulted in a 27% reduction of contrast-enhanced MRI assessed infarct size (IS). End-diastolic and end-systolic volumes were decreased by 22% and 38%, respectively. LV ejection fraction was increased by 29% in the AnxA5 group compared to vehicle. Following AnxA5 treatment LV fibrous content after three weeks was reduced by 42%, which was accompanied by an increase in LV wall thickness of the infarcted area by 17%. Two days and three weeks after MI-R injury the number of cardiac macrophages was significantly reduced in both the infarct area and border zones following AnxA5 treatment compared to vehicle treatment. Finally, we found that AnxA5 stimulation leads to a reduction of IL-6 production in bone-marrow derived macrophages in vitro. AnxA5 treatment attenuates the post-ischemic inflammatory response and ameliorates LV remodeling which improves cardiac function three weeks after MI-R injury in hypercholesterolemic ApoE*3-Leiden mice.

MeSH terms

  • Animals
  • Annexin A5 / administration & dosage*
  • Annexin A5 / genetics
  • Apolipoproteins E / genetics*
  • Bone Marrow Cells / metabolism
  • Disease Models, Animal
  • Heart / diagnostic imaging
  • Heart / drug effects
  • Heart / physiopathology*
  • Heart Function Tests
  • Heart Ventricles / diagnostic imaging
  • Heart Ventricles / metabolism
  • Heart Ventricles / physiopathology
  • Humans
  • Hypercholesterolemia / genetics
  • Hypercholesterolemia / physiopathology
  • Inflammation / diagnostic imaging
  • Inflammation / drug therapy
  • Inflammation / genetics
  • Inflammation / physiopathology
  • Interleukin-6 / biosynthesis
  • Interleukin-6 / genetics
  • Magnetic Resonance Imaging
  • Mice
  • Myocardial Infarction / diagnostic imaging
  • Myocardial Infarction / drug therapy*
  • Myocardial Infarction / genetics
  • Myocardial Infarction / physiopathology
  • Myocardial Reperfusion Injury / diagnostic imaging
  • Myocardial Reperfusion Injury / drug therapy*
  • Myocardial Reperfusion Injury / genetics
  • Myocardial Reperfusion Injury / physiopathology
  • Ventricular Function, Left / physiology
  • Ventricular Remodeling / genetics

Substances

  • Annexin A5
  • Apolipoproteins E
  • Interleukin-6