Effects of Vitamin C or E on the Pro-inflammatory Cytokines, Heat Shock Protein 70 and Antioxidant Status in Broiler Chicks under Summer Conditions

  • Jang, In-Surk (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Ko, Young-Hyun (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Moon, Yang-Soo (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology) ;
  • Sohn, Sea-Hwan (Department of Animal Science and Biotechnology, Gyeongnam National University of Science and Technology)
  • Received : 2013.12.27
  • Accepted : 2014.05.21
  • Published : 2014.05.01


The present study was carried out to investigate the effects of dietary antioxidants on pro-inflammatory cytokines, heat shock protein (HSP) and antioxidant status in broiler chicks under summer conditions. A total of 162, 3-d-old broiler chicks were randomly assigned to a basal diet (CON) and the basal diet supplemented with vitamin C (200 mg/kg diet, VCD) or vitamin E (100 mg/kg, VED) until 35 day of age. All birds were exposed to summer diurnal heat stress at average daily fluctuations of temperature between $32^{\circ}C$ to $34^{\circ}C$ at day to $27^{\circ}C$ to $29^{\circ}C$ at night for the entire feeding periods. There was no significant difference in body weight, feed to gain ratio and the relative organ weight except the thymus in response to dietary vitamin C or E supplementation. However, the mRNA expression of interleukin (IL)-$1{\beta}$, IL-6, interferon (IFN)-${\gamma}$, Toll like receptor (TLR)-4 and HSP70 in the liver of birds fed diet containing vitamin C significantly (p<0.05) decreased compared with those in birds fed basal diet. Dietary vitamin E also showed a significant (p<0.05) decrease in the mRNA expression of IL-6 and HSP70 compared with a basal diet. Total antioxidant status (TAS) in serum of birds fed vitamin C supplemented diet was significantly (p<0.05) higher with than that in birds a basal diet. Lipid peroxidation in serum and liver resulted in a significant (p<0.05) decrease in response to dietary vitamin C or E supplementation. In conclusion, dietary supplementation with antioxidant vitamins, especially vitamin C resulted in a significant decrease in the mRNA expression of pro-inflammatory cytokines and HSP70, and higher antioxidant parameters than that of birds on the basal diet under summer conditions.


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