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- W2034703108 abstract "Although the precise mechanism by which sepsis causes impairment of respiratory muscle contractility has not been fully elucidated, oxygen-derived free radicals are thought to play an important role. In our experimental study, the effects of poly(ADP-ribose) synthetase (PARS) inhibition on the diaphragmatic Ca(2+)-ATPase, malondialdehyde (MDA), and 3-nitrotyrosine (3-NT) levels and additionally histopathology of the diaphragm in lipopolysaccharide (LPS)-induced endotoxemia are investigated.Thirty-two male Wistar rats, weighing between 180-200 g were randomly divided into four groups. The first group (control; n=8) received saline solution and the second (LPS group; n=8) 10 mgkg(-1) LPS i.p. 3-Aminobenzamide (3-AB) as a PARS inhibitor; was given to the third group (C+3-AB, n=8) 20 min before administration of saline solution while the fourth group (LPS+3-AB, n=8) received 3-AB 20 min before LPS injection. Six hours later, under ketamin/xylasine anesthesia diapraghmatic specimens were obtained and the rats were decapitated. Diaphragmatic specimens were divided into four parts, three for biochemical analyses and one for histopathologic assessment. In the LPS group, tissue Ca(2+)-ATPase levels were found to be decreased and tissue MDA and 3-NT levels were found to be increased (P<0.05). In the LPS+3-AB group, 3-AB pretreatment inhibited the increase in MDA and 3-NT levels and Ca(2+)-ATPase activity remained similar to those in the control group (P<0.05). Histopathologic examination of diaphragm showed edema between muscle fibers only in LPS group. PARS inhibition with 3-AB prevented not only lipid peroxidation but also the decrease of Ca(2+)-ATPase activity in endotoxemia. These results highlights the importance of nitric oxide (NO)-peroxynitrite (ONOO(-))-PARS pathway in preventing free radical mediated injury. PARS inhibitors should further be investigated as a new thearapetic alternative in sepsis treatment." @default.
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- W2034703108 date "2002-07-01" @default.
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- W2034703108 title "POLY(ADP-RIBOSE) SYNTHETASE INHIBITION PREVENTS LIPOPOLYSACCHARIDE-INDUCED PEROXYNITRITE MEDIATED DAMAGE IN DIAPHRAGM" @default.
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- W2034703108 doi "https://doi.org/10.1016/s1043-6618(02)00037-3" @default.
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