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http://dx.doi.org/10.5536/KJPS.2016.43.4.213

Effects of Taurine Supplementation on Heat Shock Protein 70 and In Vitro Protein Syntheses in Liver of Broiler Chicks under Chronic Heat Stress  

Cho, Eun So Ri (Department of Animal Biotechnology, Chonbuk National University)
Park, Garng Hee (Department of Animal Biotechnology, Chonbuk National University)
Shim, Kwan Seob (Department of Animal Biotechnology, Chonbuk National University)
Publication Information
Korean Journal of Poultry Science / v.43, no.4, 2016 , pp. 213-218 More about this Journal
Abstract
This study was conducted to investigate the effect of taurine supplementation on heat shock protein 70 and in vitro protein turnover in broiler chicks under chronic heat stress. Chicks were allocated into 3 groups of 10 birds per group; the control group was maintained at a temperature of $24^{\circ}C$ without taurine (CO group), the heat-stressed group maintained at a temperature of $34^{\circ}C$ without taurine (HO group), and heat-stressed group maintained at a temperature of $34^{\circ}C$ with taurine (HT group). The final body and liver weights of broilers in the HO and HT groups were significantly lower than those of broilers in the CO group (P<0.05). However, these parameters of the broilers in the HT group were significantly higher than those of broilers in the HO group (P<0.05). The heat shock protein 70 (hsp70) concentration in the liver of broilers in the HO group was significantly higher than that of broilers in the CO and HT groups, but the hsp70 concentration in the liver of broilers in the HT group was not different from that of broilers in the CO group. Liver homogenates of 21 day-old broilers were incubated at temperatures of $37^{\circ}C$ and $45^{\circ}C$ to prove the effect of high temperature and taurine on total protein syntheses. Neither high temperature nor taurine supplementation affected protein syntheses in liver homogenates of the broilers. However, the more the temperature increased, the more the degradation rates of cytoplasmic protein in liver homogenates increased; however, taurine supplementation had no effects on the protein syntheses in the liver of the broiler. It is possible that taurine indirectly affected protein turnover via various physiological mechanisms.
Keywords
broiler chicks; heat stress; taurine; protein syntheses;
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