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2009 Program and Abstracts: Hypertonic Saline and Pentoxifylline Reduce Liver and Pulmonary Damages Secondary to Ischemia/Reperfusion Injury in Rats
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Hypertonic Saline and Pentoxifylline Reduce Liver and Pulmonary Damages Secondary to Ischemia/Reperfusion Injury in Rats
Vinicius R. Santos, Telesforo Bacchella, Ana Maria M. Coelho*, Sandra N. Sampietre, Nilza a. Molan, Marcel C. Machado
Gastroenterology, University of Sao Paulo, Sao Paulo, Brazil

Previous studies have demonstrated that resuscitation with hypertonic saline and pentoxifylline (HSPTX) attenuates hemorrhagic shock-induced injury when compared with Ringer’s lactate. Liver ischemia/reperfusion (I/R) process can trigger a systemic inflammatory syndrome producing remote organ damage and occurs in major liver resections and transplantation.Aim: To evaluated the effect of the combination of hypertonic saline (7.5%NaCl) and pentoxifylline (PTX) on local and systemic injury during partial liver ischemia/reperfusion.Methods: Wistar male rats underwent partial liver ischemia performed by clamping the pedicle from medium and left anterior lateral segments during an hour under mechanical ventilation. They were divided in to 3 groups: group NS (n=20): rats received 0.9% NaCl (34ml/Kg); group HS (n=20) rats received 7.5% NaCl (0.4ml/Kg); and group HSPTX (n=20): rats received 7.5% NaCl (0.4ml/Kg) + PTX (25mg/Kg). Four and twelve hours after reperfusion blood were collected for determinations of AST, ALT, TNF-α, IL-6, and IL-10. Liver and pulmonary tissues were assembled for liver histology and for liver mitochondrial oxidation and phosphorylation, pulmonary vascular permeability and myeloperoxidade (MPO) analyses.Results: Four hours after reperfusion HS and HSPTX groups presented elevation of AST and ALT serum levels significantly lower than NS group (p<0.05). A significant reduction on mitochondrial dysfunction was observed in HS and HSPTX groups compared with NS group (p<0.05). Elevation in serum TNF- α, IL-6, and IL-10 was similar among three groups (NS, HS, and SHPTX). Pulmonary vascular permeability was significantly lower in groups HS and HSPTX compared with NS group (p<0.05). No differences in pulmonary MPO activity were observed among these three groups. Twelve hours after reperfusion a significant reduction in pulmonary vascular permeability in group HSPTX was observed when compared to groups HS and NS (p<0.05). HS and HSPTX groups showed a reduction in serum IL-6 when compared to NS group (p<0.05). Conclusion: Addition of pentoxifylline to hypertonic saline solution reduces not only the liver damage but also the pulmonary vascular permeability associated to hepatic ischemia reperfusion.


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