%0 Journal Article
%T An Allosteric Modulator of the Adenosine A1 Receptor Improves Cardiac Function Following Ischaemia in Murine Isolated Hearts
%A Anna Butcher
%A Peter J. Scammells
%A Paul J. White
%A Shane M. Devine
%A Roselyn B. Rose'Meyer
%J Pharmaceuticals
%D 2013
%I MDPI AG
%R 10.3390/ph6040546
%X The effect of an allosteric modulator of the adenosine A 1 receptors was investigated using an ischaemia-reperfusion protocol in murine isolated hearts. Isolated hearts were perfused with Kreb-Henseleit solution gassed with carbogen gas (95% O 2 and 5% CO 2) in Langendorff mode and electrically paced at 480 bpm. Following 20 min equilibration and 20 min global normothermic ischaemia, the allosteric modulator VCP333 (1 ¦ÌM) or the adenosine A 1 receptor partial agonist VCP102 (10 ¦ÌM) were infused after 5 min of reperfusion for 15 min. Upon termination of the drug treatment, reperfusion continued for a further 40 min. At the end of 60 min reperfusion, treatment with VCP333 or VCP102 improved the recovery of the left ventricular developed pressure when compared to control group responses ( p < 0.05). Neither compound affected end diastolic pressure, coronary flow rates or dP/dt max values when compared to control tissues during reperfusion ( p > 0.05). The infusion of VCP102 or VCP333 during reperfusion reduced cardiac troponin I efflux to 6.7% and 25% respectively of control heart efflux ( p < 0.05). This data indicates that the allosteric modulator of the adenosine A 1 receptor (VCP333) has similar characteristics to the adenosine receptor partial agonist VCP102 as it improves cardiac function and reduces myocardial cell death following an ischaemic episode.
%K allosteric modulator
%K adenosine A1 receptor
%K cardioprotection
%K heart
%U http://www.mdpi.com/1424-8247/6/4/546