银杏叶提取物对肉仔鸡淋巴细胞增殖及细胞因子水平的影响

为了研究银杏叶提取物(EGB)对肉仔鸡淋巴细胞增殖及细胞因子水平的影响。将360只1日龄健康AA肉用母雏鸡随机分成5组,每组6个重复,其中一组为对照组,饲喂基础日粮;其余4组分别饲喂添加0.009%金霉素及0.15%、0.20%和0.25%EGB的日粮,试验期为42天。测定肉仔鸡外周血和脾脏淋巴细胞转化率以及血清中细胞因子IL-1、IL-2、IFN-γ、TNF-α的含量。结果显示,日粮中添加不同水平EGB可促进肉仔鸡外周血和脾脏淋巴细胞增殖转化,提高血清中细胞因子IL-1、IL-2、IFN-γ、TNF-α的水平,并且在日粮中添加EGB的作用效果比添加金霉素的作用效果好。表明日粮中添加EGB可增强肉仔鸡的免疫功能。

Effects of Ginkgo Biloba Extract on Lymphocyte Proliferation and the Level of Cytokines in Broiler Chicks

In order to investigate the effects of ginkgo biloba extract（EGB） on lymphocyte proliferation and the level of cytokines in broiler chicks.Three hundred and sixty one-day-old healthy Arbor Acres female broiler chicks were divided into five groups,each with six replicates.The first group was the control group and fed a basal diet,while the other four groups were fed the same basal diet supplemented with 0.009% aureomycin or 0.15%,0.20%,0.25% EGB.The experiment lasted 42 days.Lymphocyte proliferation of peripheral blood and spleen and the level of cytokine IL-1,IL-2,IFN-γ,TNF-α in serum were determined.The results showed that adding EGB to diets of broilers could improved lymphocyte proliferation of peripheral blood and spleen and increase the level of cytokine IL-1,IL-2,IFN-γ,TNF-α in serum.The effect of adding EGB to diets was better than that of adding aureomycin to diets.The study suggested that adding EGB to diets could enhance the immunity of broilers.