Korean Journal of Poultry Science (한국가금학회지)

The Korean Society of Poultry Science (한국가금학회)
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Effects of Taurine Supplementation on Heat Shock Protein 70 and In Vitro Protein Syntheses in Liver of Broiler Chicks under Chronic Heat Stress

고온 스트레스 하에 타우린 첨가가 육계 간의 Heat Shock Protein 70 및 In Vitro의 단백질 합성에 미치는 영향

  • 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)
  • 조은소리 (전북대학교 동물생명공학과) ;
  • 박강희 (전북대학교 동물생명공학과) ;
  • 심관섭 (전북대학교 동물생명공학과)
  • Received : 2016.08.30
  • Accepted : 2016.10.18
  • Published : 2016.12.31
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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.

본 연구는 고온 스트레스 하에 타우린 첨가가 육계의 간에서 heat shock protein 70(hsp 70) 및 cell free system 상태에서 단백질 합성에 미치는 영향을 조사하였다. 공시동물은 1일령 육계 120수를 2주간 사육 후, 대조(CO, $24^{\circ}C$)와 고온스트레스 처리($34^{\circ}C$)에서 타우린을 공급하지 않은 처리구(HO)와 타우린 0.1%를 공급한 처리구(HT)로 나누어 3처리 4반복, 반복 당 10수씩 배치하였다. 고온 스트레스는 3, 6, 9, 12일간 진행하였다. 최종 체중과 간 무게는 HO와 HT가 CO보다 유의적으로 낮았다(P<0.05). 그러나 타우린을 첨가한 HT은 HO보다 유의적으로 높았다(P<0.05). 육계 간에서 hsp70 발현은 HO가 CO와 HT보다 유의적으로 높았으나(P<0.05), CO와 HT는 유의적인 차이가 없었다. In vitro 실험에서 고온 및 타우린은 21일령 육계 간의 총 단백질 합성률에 영향을 미치지 않았다. 따라서 타우린 섭취가 in vivo 육계의 성장에서 고온 스트레스를 완화시키지만, 생체 내의 단백질 합성에 직접적인 영향을 미치지 않는 것을 보이며, 이러한 결과는 타우린이 다양한 생리학적 기전을 통해 단백질 turnover 대사에 간접적으로 영향을 미칠 수 있다는 것으로 사료된다.

Keywords

References

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