Effects of a new crystalline amino acids solution on free radical metabolism and immune function in traumatized rats / 肠外与肠内营养

ABSTRACT

Objectives:In this study,the effects of glutamine(Gln) and branched chain amino acids(BCAA) enriched formulas on free radical metabolism and immunity in traumatized rats were investigated. Methods:After injury,twenty one male Wistar rats were randomly divided into three groups,and fed with rations containing casein,a commercial amino acids(17AA),and a new amino acids formula(20 AA) respectively.The rations were isonitrogenous and isocaloric.Before operation and on days 3,7,14 postoperation,body weight,dietary intake,the concentrations of MDA,the activities of SOD in plasma were measured.At last,the animals were killed,the hydroyproline and spleen lymphocyte blastogenesis were determined. Results:①After injury,body weight of rats were reduced significantly,the concentrations of MDA in plasma were increased,while the SOD activities were decreased. ②Compared with 17AA group, the levels of hydroyproline in sponge were increased in 20AA group.③There were better effects of reducing plasma MDA levels and enhancing plasma antioxidase activities in 20 AA group than 17 AA group.④The weight of thymus and spleen and spleen lymphocyte blastogenesis were more obviously increased in 20AA group than in 17AA group. Conclusions:The new amino acids preparations can increase the antioxidase activities,enhance immunity and promote wound healing.