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• W2015114689 abstract "Background and purpose: Hydrogen sulphide (H2S) is an endogenous gaseous mediator active in the multilevel regulation of pathophysiological functions in mammalian cardiovascular tissues. Experimental approach: This study investigated the pharmacological activity of a new H2S-releasing derivative of diclofenac, S-diclofenac (2-[(2,6-dichlorophenyl)amino]benzeneacetic acid 4-(3H-1,2-dithiole-3-thione-5-yl)-phenyl ester) in the isolated rabbit heart submitted to low-flow ischaemia-reperfusion damage. Key results: S-diclofenac (3, 10 and 30 μM), despite inhibiting prostacyclin generation by cardiac tissues, achieved dose-dependent normalization of coronary perfusion pressure, reducing left ventricular contracture during ischaemia and improving left ventricular developed pressure and ±dP/dtmax at reperfusion. Creatine kinase and lactate dehydrogenase activities in heart perfusates were significantly reduced during reperfusion. These effects were accompanied by substantial release of reduced glutathione (GSH), indicating that the H2S moiety may have up-regulated cysteine transport. The anti-ischaemic activities of S-diclofenac and the H2S-donor sodium hydro sulphide (NaHS) were partially prevented by the KATP channel antagonist glibenclamide, suggesting a mechanism similar to H2S-induced cardioprotection in metabolic ischaemic preconditioning. Perfusion with the nitric oxide (NO) synthase inhibitor NG-monomethyl-L-arginine worsened the myocardial ischaemia-reperfusion damage, but this was dose-dependently prevented by S-diclofenac and NaHS, suggesting that the released H2S may have overcome NO deficiency. Conclusion and implications: These data show that S-diclofenac had marked anti-ischaemic activity in ischaemic-reperfused rabbit hearts despite inhibition of prostaglandin generation. Increased GSH formation leading to activation of KATP channels may have contributed to this beneficial effect. The pharmacological profile of S-diclofenac and its anti-inflammatory activity, with diminished gastrointestinal side effects, offer therapeutic applications in cardiovascular disease. British Journal of Pharmacology (2008) 153, 100–109; doi:10.1038/sj.bjp.0707540; published online 29 October 2007" @default.
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• W2015114689 date "2008-01-01" @default.
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• W2015114689 title "The hydrogen sulphide-releasing derivative of diclofenac protects against ischaemia-reperfusion injury in the isolated rabbit heart" @default.
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• W2015114689 doi "https://doi.org/10.1038/sj.bjp.0707540" @default.
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