【摘要】 目的　探讨谷氨酰胺对大鼠烧伤后代谢率变化及相关激素分泌的影响。方法　采用 3 0 %体表面积Ⅲ度烧伤大鼠模型 ,将 88只Wistar大鼠随机分为烧伤对照 (B)组和谷氨酰胺 (GLN)组。两组大鼠采用等氮、等热卡的营养支持 ,GLN组予 1 0g/kg dGLN ,B组予等量的甘氨酸。观察了伤前及伤后 (PBD) 1、3、5、7、10d大鼠静息能量代谢率 (REE)的变化 ,检测了血中胰岛素、胰高血糖素及皮质醇的含量 ,并进行相关分析。结果　烧伤后两组大鼠的REE、血浆胰岛素、胰高血糖素和皮质醇含量均明显高于伤前。两组相比 ,GLN组的REE明显低于B组 ,血浆胰高血糖素和皮质醇略低于B组 ,胰岛素含量略高于B组 ,在PBD3～ 5存在显著差异。而胰岛素及胰岛素 /胰高血糖比值则明显高于B组 ,在PBD1～ 10存在显著差异 ( P <0 0 5 ,P <0 0 1)。相关分析显示 ,REE同胰岛素 /胰高血糖素比值呈显著负相关 (r=-0 78,P <0 0 5 )。结论　烧伤大鼠代谢率明显增高 ,服用谷氨酰胺能有效降低烧伤后高代谢反应 ,其机制与谷氨酰胺能促进合成激素分泌 ,降低分解激素释放有关更多还原

【Abstract】 Objective To study the effect of glutamine on hypermetabolism reaction and hormone secretion after severe burn injury. Methods Eighty-eight Wistar rats were inflicted with 30% total body surface area full thickness burns and randomly divided into two groups: namely burned control (B) and glutamine treatment(GLN) group. There was isonitrogenous and isocaloric intake in both groups, and rats of GLN and B groups were given glutamine and glycine at 1 0g/kg d, respectively. The following indices including the resting energy expenditure (REE), the levels of plasma cortisol, insulin and glucagon were determined. Results After burn injury, the REE, plasma cortisol,insulin and glucagons levels were significant increased in both groups. Compared with B group, the level of REE decreased and the ratio of insulin/glucagons increased in GLN group. Correlation analyses showed that REE had a negative correlation with insulin/glucagons ratio (r=-0 78,P<0 05). Conclusions There are hypermetabolism reaction after severe burn injury, and glutamine treatment could reduce the hypermetabolic reaction. It may be the mechanism of glutamine effect that reducing catabolism hormone release and promoting anabolism hormone secretion.更多还原