Primary Study on Molecule Mechanism of Anti-Heat Stress of Chinese Herbal Medicines on Hens

In order to investigate the effects of three Chinese herbal medicines (CHMs) on production,endocrine,antioxidant status and molecule mechanism of hens during heat stress,eighty 58-weeks old hens were used in the current study.The experiment birds were randomly divided into 4 groups.Group 1,2,3 were fed a basal diet supplemented with 1% Ligustrum lucidum (LL),Schisandra chinensis (SC) or Si Jun Zi Tang (SJZT),respectively.Group 4 were fed the basal as the control.The results shown that diets supplemented with 1% LL,SC,and SJZT significantly increased production of hens.It was also found that LL,SC and SJZT significantly reduced MDA content in tissues and serum of hen.Meanwhile,LL and SC significantly decreased serum GOT and ALT activity.SC and SJZT significantly improved serum T3 levels.In addition,LL,SC,and SJZT significantly increased mRNA expression of HSP70 of hens during heat stress.The results demonstrated that diets supplemented with 1% LL,SC,and SJZT could improve performance by increasing lipids stability,modulating endocrine and enhancing mRNA expression of liver HSP70 of hens during heat stress.