Background Epithelial dysfunction in lungs plays a key role in the pathogenesis of acute lung injury. The beneficial effects of low potassium dextran glucose solution （LPD） have been reported in lung preservation, a...Background Epithelial dysfunction in lungs plays a key role in the pathogenesis of acute lung injury. The beneficial effects of low potassium dextran glucose solution （LPD） have been reported in lung preservation, and LPD enables injured alveolar pneumocytes to recover. So we hypothesized that systemic administration of LPD may have benefits in treating acute lung injury. We investigated the effects of LPD on arterial blood gas and levels of some cytokines in oleic acid-induced acute lung injury in juvenile piglets.Methods Oleic acid （0.1 ml/kg） was intrapulmonarily administered to healthy anesthetized juvenile piglets. Ten animals were randomly assigned to two groups （n=5 each）： oleic acid-induced group （control group） with intravenous infusion of 12.5 ml/kg of lactated Ringer＇s solution 30 minutes before administration of oleic acid and LPD group with systemic administration of LPD （12.5 ml/kg） 30 minutes before injecting oleic acid. Blood gas variables and concentrations of tumor necrosis factor alpha, endothelin 1 and interleukin 10 were measured before and every 1 hour for 6 hours after initial lung injury.Results Compared with control group, blood pH, partial pressure of arterial oxygen to fraction of inspired oxygen ratio,partial pressure of arterial carbon dioxide, and mean pulmonary arterial pressure in LPD group were improved （P＜0.05or 0.01）. Six hours after lung injury, concentration of tumor necrosis factor alpha in lung tissue was lower in LPD group than control group （P＜0.05）. Plasmic concentration of endothelin 1 showed lower in LPD group while plasmic concentration of interleukin 10 showed higher in LPD group （P＜0.05）.Conclusions Before lung injury, systemic administration of LPD can improve gas exchange, attenuate pulmonary hypertension, decrease plasmic levels of endothelin 1, increase interleukin 10 and decrease concentration of tumor necrosis factor alpha in lung tissue in oleic acid-induced acute lung injury in juvenile piglets.展开更多
Background Low potassium dextran （LPD） solution can attenuate acute lung injury （ALl）. However, LPD solution for treating acute kidney injury secondary to ALl has not been reported. The present study was performed...Background Low potassium dextran （LPD） solution can attenuate acute lung injury （ALl）. However, LPD solution for treating acute kidney injury secondary to ALl has not been reported. The present study was performed to examine the renoprotective effect of LPD solution in ALl induced by oleic acid （OA） in piglets. Methods Twelve animals that suffered an ALl induced by administration of OA into the right atrium were divided into two groups： the placebo group （n=6） pretreated with normal saline and the LPD group （n=6）, pretreated with LPD solution. LPD solution was injected intravenously at a dose of 12.5 ml/kg via the auricular vein 1 hour before OA injection. Results All animals survived the experiments with mild histopathological injury to the kidney. There were no significant differences in mean arterial pressure （MAP）, creatinin and renal damage scores between the two groups. Compared with the placebo group, the LPD group had better gas exchange parameters at most of the observation points （（347.0±12.6） mmHg vs. （284.3±11.3） mmHg at 6 hours after ALl, P 〈0.01）. After 6 hours of treatment with OA, the plasma concentrations of NGAL and intedeukin （IL）-6 in both groups increased dramatically compared to baseline （（6.0±0.6） and （2.50±0.08） folds in placebo group; and （2.5±0.5） and （1.40±0.05） folds in LPD group）, but the change of both parameters in the LPD group was significantly lower （P 〈0.01） than in the placebo group. And 6 hours after ALl the kidney tissue concentration of IL-6 in the LPD group （（165.7 ± 22.5） pg·m-1·g-1 protein） was significantly lower （P 〈0.01） than that in placebo group （（67.2± 25.3） pg·m-1·g-1 protein）. Conclusion These findings suggest that pretreatment with LPD solution via systemic administration might attenuate acute kidney injury and the cytokine response of IL-6 in the ALl piglet model induced by OA injection.展开更多
基金This study was supported by grants from the National Natural Science Foundation of China （No. 81070055） and the Beijing City Education Committee （No. PXM2011_014226 _07_000060）
文摘Background Epithelial dysfunction in lungs plays a key role in the pathogenesis of acute lung injury. The beneficial effects of low potassium dextran glucose solution （LPD） have been reported in lung preservation, and LPD enables injured alveolar pneumocytes to recover. So we hypothesized that systemic administration of LPD may have benefits in treating acute lung injury. We investigated the effects of LPD on arterial blood gas and levels of some cytokines in oleic acid-induced acute lung injury in juvenile piglets.Methods Oleic acid （0.1 ml/kg） was intrapulmonarily administered to healthy anesthetized juvenile piglets. Ten animals were randomly assigned to two groups （n=5 each）： oleic acid-induced group （control group） with intravenous infusion of 12.5 ml/kg of lactated Ringer＇s solution 30 minutes before administration of oleic acid and LPD group with systemic administration of LPD （12.5 ml/kg） 30 minutes before injecting oleic acid. Blood gas variables and concentrations of tumor necrosis factor alpha, endothelin 1 and interleukin 10 were measured before and every 1 hour for 6 hours after initial lung injury.Results Compared with control group, blood pH, partial pressure of arterial oxygen to fraction of inspired oxygen ratio,partial pressure of arterial carbon dioxide, and mean pulmonary arterial pressure in LPD group were improved （P＜0.05or 0.01）. Six hours after lung injury, concentration of tumor necrosis factor alpha in lung tissue was lower in LPD group than control group （P＜0.05）. Plasmic concentration of endothelin 1 showed lower in LPD group while plasmic concentration of interleukin 10 showed higher in LPD group （P＜0.05）.Conclusions Before lung injury, systemic administration of LPD can improve gas exchange, attenuate pulmonary hypertension, decrease plasmic levels of endothelin 1, increase interleukin 10 and decrease concentration of tumor necrosis factor alpha in lung tissue in oleic acid-induced acute lung injury in juvenile piglets.
基金This work was supported by grants from the National Natural Science Foundation of China （No. 30971380 and No. 31071026） and by the National Excellent Doctoral Dissertation of China.
文摘Background Low potassium dextran （LPD） solution can attenuate acute lung injury （ALl）. However, LPD solution for treating acute kidney injury secondary to ALl has not been reported. The present study was performed to examine the renoprotective effect of LPD solution in ALl induced by oleic acid （OA） in piglets. Methods Twelve animals that suffered an ALl induced by administration of OA into the right atrium were divided into two groups： the placebo group （n=6） pretreated with normal saline and the LPD group （n=6）, pretreated with LPD solution. LPD solution was injected intravenously at a dose of 12.5 ml/kg via the auricular vein 1 hour before OA injection. Results All animals survived the experiments with mild histopathological injury to the kidney. There were no significant differences in mean arterial pressure （MAP）, creatinin and renal damage scores between the two groups. Compared with the placebo group, the LPD group had better gas exchange parameters at most of the observation points （（347.0±12.6） mmHg vs. （284.3±11.3） mmHg at 6 hours after ALl, P 〈0.01）. After 6 hours of treatment with OA, the plasma concentrations of NGAL and intedeukin （IL）-6 in both groups increased dramatically compared to baseline （（6.0±0.6） and （2.50±0.08） folds in placebo group; and （2.5±0.5） and （1.40±0.05） folds in LPD group）, but the change of both parameters in the LPD group was significantly lower （P 〈0.01） than in the placebo group. And 6 hours after ALl the kidney tissue concentration of IL-6 in the LPD group （（165.7 ± 22.5） pg·m-1·g-1 protein） was significantly lower （P 〈0.01） than that in placebo group （（67.2± 25.3） pg·m-1·g-1 protein）. Conclusion These findings suggest that pretreatment with LPD solution via systemic administration might attenuate acute kidney injury and the cytokine response of IL-6 in the ALl piglet model induced by OA injection.
