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Endothelium-dependent and -independent hepatic artery vasodilatation is not impaired in a canine model of liver ischemia-reperfusion injury BJMBR
Miranda,L.C.; Viaro,F.; Ceneviva,R.; Evora,P.R.B..
We investigated whether hepatic artery endothelium may be the earliest site of injury consequent to liver ischemia and reperfusion. Twenty-four heartworm-free mongrel dogs of either sex exposed to liver ischemia/reperfusion in vivo were randomized into four experimental groups (N = 6): a) control, sham-operated dogs, b) dogs subjected to 60 min of ischemia, c) dogs subjected to 30 min of ischemia and 60 min of reperfusion, and d) animals subjected to 45 min of ischemia and 120 min of reperfusion. The nitric oxide endothelium-dependent relaxation of hepatic artery rings contracted with prostaglandin F2a and exposed to increasing concentrations of acetylcholine, calcium ionophore A23187, sodium fluoride, phospholipase-C, poly-L-arginine, isoproterenol, and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Endothelium; Hepatic artery; Nitric oxide; Liver; Ischemia/reperfusion injury.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000600016
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Exogenous ATP administration prevents ischemia/reperfusion-induced oxidative stress and tissue injury by modulation of hypoxanthine metabolic pathway in rat ovary Ciência Rural
Kumbasar,Serkan; Cetin,Nihal; Yapca,Omer Erkan; Sener,Ebru; Isaoglu,Unal; Yilmaz,ehmet; Salman,Suleyman; Aksoy,Ayse Nur; Gul,Mehmet Ali; Suleyman,Halis.
In this study, xanthine oxidase (XO), malondialdehyde (MDA), myeloperoxidase (MPO) and glutathione (GSH) levels in the ovarian tissues of rats during the development of ischemia and postischemia-induced reperfusion were investigated, and the effect of ATP on ischemia-reperfusion (I/R) damage was biochemically and histopathologically examined. The results of the biochemical analyses demonstrated that ATP significantly reduced the level of XO and MDA and increased the amount of GSH in both ischemia and I/R-applied ovarian tissue at the doses administered. Furthermore, ATP significantly suppressed the increase in MPO activity that occurred following the application of post ischemia reperfusion in the ovarian tissue. The biochemical results obtained in the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xanthine oxidase metabolism; Ischemia/reperfusion injury; Antioxidant; Rat.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014000701257
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Hydrogen sulfide postconditioning protects isolated rat hearts against ischemia and reperfusion injury mediated by the JAK2/STAT3 survival pathway BJMBR
Luan,Heng-Fei; Zhao,Zhi-Bin; Zhao,Qi-Hong; Zhu,Pin; Xiu,Ming-Yu; Ji,Yong.
The JAK2/STAT3 signal pathway is an important component of survivor activating factor enhancement (SAFE) pathway. The objective of the present study was to determine whether the JAK2/STAT3 signaling pathway participates in hydrogen sulfide (H2S) postconditioning, protecting isolated rat hearts from ischemic-reperfusion injury. Male Sprague-Dawley rats (230-270 g) were divided into 6 groups (N = 14 per group): time-matched perfusion (Sham) group, ischemia/reperfusion (I/R) group, NaHS postconditioning group, NaHS with AG-490 group, AG-490 (5 µM) group, and dimethyl sulfoxide (DMSO; <0.2%) group. Langendorff-perfused rat hearts, with the exception of the Sham group, were subjected to 30 min of ischemia followed by 90 min of reperfusion after 20 min of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrogen sulfide; JAK2/STAT3; Apoptosis; Postconditioning; Ischemia/reperfusion injury.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2012001000003
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p53-Rb signaling pathway is involved in tubular cell senescence in renal ischemia/reperfusion injury Biocell
Li,Kailong; Du,Xiaolan; He,Yani; Zhao,Lin; Yang,Jvrong; Song,Ruihua; Chen,Lin.
Objective: To investigate the course of tubular cell senescence and expressions of p53, p21, and Rb during the late phase of ischemia/reperfusion (IRI) in the kidney, and assess the effects of the p53-Rb pathway on tubular cell senescence. Methods: Experimental models of unilateral renal IRI were used in p53(+/+) and p53(-/-) mice. Histological changes at the tubular level, progress of cell senescence, and the expression of Rb, p21, and/or p53 proteins in tubular cells were studied at different moments in time after IRI. Results: Chronic tubulointerstitial fibrosis was much more severe and widely distributed in IRI kidneys of p53(+/+) mice in later stages than in earlier stages. Senescent tubular cells were significantly increased at 3 and 6 months after...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cell senescence; Cell cycle regulatory protein; Ischemia/reperfusion injury; Kidney.
Ano: 2007 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0327-95452007000200003
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