IB‐MECA and Cardioprotection
2006
The adenosine A 3 receptor plays an important role in ischemic preconditioning. Activation of the adenosine A 3 receptor with its agonists induces both early and late pharmacological preconditioning through various mechanisms. As the first potent and selective adenosine A 3 receptor agonist, IB-MECA (N 6 -(3 -iodobenzyl) -adenosine-5' -N-methylcarboxamide) has been demonstrated to induce cardioprotection against myocardial ischemia/reperfusion injury when given before onset of ischemia by triggering pharmacological preconditioning. More importantly, IB-MECA can also protect the heart even when administered at the onset of reperfusion after ischemia, indicating a strong likelihood that the drug may be useful for the treatment of patients with acute myocardial infarction. However, since IB-MECA has been reported to have lethal effects at higher concentrations, and may cause systemic hypertension in some species, further studies are needed to find the best treatment strategy to increase its therapeutic potential.
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