3-nitrotyrosine and Mesenteric-Vascular-Occlusion
3-nitrotyrosine has been researched along with Mesenteric-Vascular-Occlusion* in 2 studies
Other Studies
2 other study(ies) available for 3-nitrotyrosine and Mesenteric-Vascular-Occlusion
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Melatonin and 1400 W ameliorate both intestinal and remote organ injury following mesenteric ischemia/reperfusion.
Acute intestinal ischemia reperfusion (I/R) injury affects not only the intestines but also remote organs due to pro-inflammatory and tissue injurious factors. Thus, we aimed to investigate the roles of melatonin (a powerful antioxidant) and 1400W (a strong inhibitor of inducible nitric oxide) in a rat intestinal I/R injury model, since oxidative and nitrosative injury are believed to be the major causes.. A total of 56 Wistar albino rats were used, with seven rats in each group. After I/R induction in the intestines by clamping/unclamping the superior mesenteric artery, we measured malondialdehyde, superoxide dismutase, glutathione peroxidase, nitric oxide, and 3-nitrotyrosine levels in lung, kidney, and liver tissues (to evaluate remote organ injury) as well as in the intestines. Study groups received melatonin, 1400W or both to examine the roles of these molecules in the pathogenesis of injury following I/R.. Melatonin and 1400W had an ameliorating effect on both oxidative and nitrosative stress in the intestine and the lung against mesenteric I/R injury in rats. Moreover, each of these two agents had an inhibitory effect on oxidative injury and histopathological changes in the intestine and the lung. Furthermore, the combination of both agents (melatonin and 1400W) was more effective than either of the agents alone (P < 0.05).. Melatonin and 1400W, either alone or in combination, were efficient in ameliorating experimental I/R injury of the intestines. Topics: Amidines; Animals; Antioxidants; Benzylamines; Enzyme Inhibitors; Glutathione Peroxidase; Glutathione Peroxidase GPX1; Intestinal Mucosa; Intestines; Kidney; Liver; Lung; Male; Malondialdehyde; Melatonin; Mesenteric Vascular Occlusion; Nitric Oxide Synthase Type II; Oxidative Stress; Rats; Rats, Wistar; Reperfusion Injury; Superoxide Dismutase; Survival Rate; Tyrosine | 2009 |
Beneficial effects of 5-aminoisoquinolinone, a novel, potent, water-soluble, inhibitor of poly (ADP-ribose) polymerase, in a rat model of splanchnic artery occlusion and reperfusion.
Poly(ADP-ribose) polymerase (PARP), a nuclear enzyme activated by strand breaks in DNA, plays an important role in the tissue injury associated with ischemia-reperfusion and inflammation. Splanchnic artery occlusion and reperfusion causes an enhanced formation of reactive oxygen species which contribute to the pathophysiology of shock. The aim of the present study was to investigate the effects of 5-aminoisoquinolinone (5-AIQ), a potent water-soluble inhibitor of poly(ADP-ribose) polymerase (PARP), in the pathogenesis of splanchnic artery occlusion shock. Splanchnic artery occlusion shock was induced in rats by clamping both the superior mesenteric artery and the celiac artery for 45 min, followed thereafter by release of the clamp (reperfusion). At 60 min after reperfusion, all animals were sacrificed for histological examination and biochemical studies. Treatment of rats with 5-AIQ (3 mg/kg i.v.), attenuated the fall of mean arterial blood pressure caused by splanchnic artery occlusion shock. 5-AIQ also attenuated the ileum injury as well as the increase in the tissue levels of myeloperoxidase and malondialdehyde caused by splanchnic artery occlusion shock in the ileum. The immunohistochemical examination also demonstrated a marked increase in the immunoreactivity to PAR, nitrotyrosine, and intercellular adhesion molecule (ICAM-1) in the necrotic ileum from splanchnic artery occlusion-shocked rats. 5-AIQ treatment significantly reduced the increase of positive staining for PAR, nitrotyrosine and ICAM-I. In conclusion, these results show that 5-AIQ, a new water-soluble potent inhibitor of poly(ADP-ribose) polymerase, exerts multiple protective effects in splanchnic artery occlusion/reperfusion shock. Topics: Animals; Celiac Artery; Disease Models, Animal; Intercellular Adhesion Molecule-1; Intestine, Small; Ischemia; Isoquinolines; Lipid Peroxidation; Male; Malondialdehyde; Mesenteric Artery, Superior; Mesenteric Vascular Occlusion; Peroxidase; Poly(ADP-ribose) Polymerase Inhibitors; Rats; Rats, Sprague-Dawley; Reperfusion; Reperfusion Injury; Solubility; Tyrosine; Water | 2004 |