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Attenuation of Na/K-ATPase Mediated Oxidant Amplification with pNaKtide Ameliorates Experimental Uremic Cardiomyopathy #MMPMID27698370
Liu J; Tian J; Chaudhry M; Maxwell K; Yan Y; Wang X; Shah PT; Khawaja AA; Martin R; Robinette TJ; El-Hamdani A; Dodrill MW; Sodhi K; Drummond CA; Haller ST; Kennedy DJ; Abraham NG; Xie Z; Shapiro JI
Sci Rep 2016[Oct]; 6 (ä): 34592 PMID27698370show ga
We have previously reported that the sodium potassium adenosine triphosphatase (Na/K-ATPase) can effect the amplification of reactive oxygen species. In this study, we examined whether attenuation of oxidant stress by antagonism of Na/K-ATPase oxidant amplification might ameliorate experimental uremic cardiomyopathy induced by partial nephrectomy (PNx). PNx induced the development of cardiac morphological and biochemical changes consistent with human uremic cardiomyopathy. Both inhibition of Na/K-ATPase oxidant amplification with pNaKtide and induction of heme oxygenase-1 (HO-1) with cobalt protoporphyrin (CoPP) markedly attenuated the development of phenotypical features of uremic cardiomyopathy. In a reversal study, administration of pNaKtide after the induction of uremic cardiomyopathy reversed many of the phenotypical features. Attenuation of Na/K-ATPase oxidant amplification may be a potential strategy for clinical therapy of this disorder.