A(3) adenosine receptor activation during reperfusion reduces infarct size through actions on bone marrow-derived cells.

Journal of Molecular and Cellular Cardiology
Zhi-Dong GeJ A Auchampach

Abstract

The goal of this study was to examine whether the A(3) adenosine receptor (A(3)AR) agonist Cl-IB-MECA protects against myocardial ischemia/reperfusion injury when administered at the time of reperfusion in an in vivo mouse model of infarction induced by 30min of coronary occlusion and 24h of reperfusion. Treating B6 wild-type with Cl-IB-MECA during the reperfusion phase (100microg/kg i.v. bolus+0.3microg/kg/min subcutaneously via implantation of Alzet mini-osmotic pumps) reduced myocardial infarct size approximately 37% from 50.1+/-2.5% in vehicle-treated mice to 31.6+/-2.8% in Cl-IB-MECA-treated mice, and significantly reduced the number of leukocytes that infiltrated into the ischemic-reperfused myocardium. Cl-IB-MECA did not reduce infarct size or limit leukocyte accumulation in studies using B6 congenic A(3)AR gene "knock-out" mice or in chimeric mice lacking the expression of A(3)ARs in bone marrow (BM)-derived cells. Subsequent mechanistic studies demonstrated that Cl-IB-MECA inhibited migration of mouse neutrophils isolated from BM towards the chemotactic substance c5a in trans-well migration assays, and inhibited leukocyte migration into the peritoneal cavity in a mouse model of thioglycollate-induced peritonitis. We co...Continue Reading

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Citations

Nov 14, 2013·Cardiovascular Drugs and Therapy·Afthab HussainHelen L Maddock
Jun 15, 2013·Pharmacology & Therapeutics·John P HeadrickJason N Peart
Jul 16, 2010·American Journal of Physiology. Cell Physiology·Yan FengWei Chao
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Dec 18, 2015·Cancer Chemotherapy and Pharmacology·Aya GalalEbtehal El-Demerdash
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