Peroxynitrite-induced a-actinin nitration and contractile alterations in isolated human myocardial cells

نویسندگان

  • Attila Borbély
  • Attila Tóth
  • István Édes
  • László Virág
  • Julius Gy Papp
  • András Varró
  • Walter J. Paulus
  • Jolanda van der Velden
  • Ger J.M. Stienen
  • Zoltán Papp
چکیده

Division of Clinical Physiology, Institute of Cardiology, UD MHSC, P.O. Box 1, H-4004 Debrecen, Hungary Department of Medical Chemistry, UD MHSC, P.O. Box 1, H-4004 Debrecen, Hungary USZ Department of Pharmacology and Pharmacotherapy, P.O. Box 427, H-6701 Szeged, Hungary Laboratory for Physiology, Institute for Cardiovascular Research, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands

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Peroxynitrite-induced alpha-actinin nitration and contractile alterations in isolated human myocardial cells.

OBJECTIVE Peroxynitrite-mediated myocardial protein nitration has been associated with a depressed cardiac pump function. In the present study, an attempt was made to elucidate the molecular background of peroxynitrite-evoked alterations in the human myocardium. METHODS Isometric force generation was measured in permeabilized human ventricular myocytes and biochemical methods were employed to...

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Peroxynitrite decomposition catalysts prevent myocardial dysfunction and inflammation in endotoxemic rats.

OBJECTIVES The aim of this study was to test whether peroxynitrite neutralizers would reduce peroxynitrite accumulation and improve myocardial contractile dysfunction and inflammation in endotoxin-treated rats. BACKGROUND Release of endogenous proinflammatory cytokines such as tumor necrosis factor (TNF)-alpha in response to endotoxin is responsible for the production of large amounts of nitr...

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The nitric oxide-mediated actions are mostly due to cyclic GMP (cGMP) formation, but cGMP-independent mechanisms, such as tyrosine nitration, have been suggested as potential signaling pathways modulating the NO-induced responses. However, the mechanisms that lead to tyrosine nitration in platelets are poorly studied, and the protein targets of nitration have not been identified in these cells....

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تاریخ انتشار 2005