Earticle

초록

영어

This study was performed to evaluate the effect of heat stress on the status of physiological responses, blood parameter, serum T3 and cortisol, and heat shock proteins (HSP 27, 70, and 90) of Hanwoo cattle. Six Hanwoo steers (242.8 ± 7.2 kg of BW) were housed in the climate-controlled respiration chambers. The experiment consisted of 7 days (control; 0 day) at thermoneutral (air temperature (Ta) of 15oC and relative humidity (RH) of 60%; temperature-humidity index (THI) = 64), and by 3 and 6 days (treatment groups) at heat stress (Ta of 35oC and RH of 60%; THI = 87). Body temperature of each parts (frank, rump, perineum and foot) and rectal temperature elevated in heat stress groups (3 days and 6 days) than the control group (0 day). Respiration rates increased in 3 days and 6 days (88.5 ± 0.96 bpm and 86.3 ± 0.63 bpm, respectively) from 0 days (39.5 ± 0.65 bpm). Feed intake significantly decreased in heat stress groups (3 days and 6 days, 3.7 ± 0.14 kg and 4.0 ± 0.15 kg, respectively) than the control group (0 day, 5.0 ± 0.00 kg). In addition, final BW significantly decreased in heat stress groups (3 days and 6 days, 211.8 ± 4.75 kg and 215.5 ± 3.50 kg, respectively) than the control group (0 day, 240.0 ± 25.00 kg). However, heat stress has no significant effect on blood parameter, serum T3 and cortisol. Nevertheless, heat stress increased HSPs mRNA expression in liver tissue, and serum concentration of HSPs. Despite Hanwoo cattle may have high adaptive ability to heat stress, our results suggested that heat stress directly effect on body temperature and respiration rate as well as serum and tissue HSPs. Therefore, we are recommended that HSPs could be the most appropriate indicators of Hanwoo cattle response to heat stress.

목차

ABSTRACT
INTRODUCTION
MATERIALS AND METHODS
Climate-controlled respiration chamber
Animals and experimental design
Physiological parameters
Blood sampling and serum analysis
Liver sampling and real-time PCR
Statistical analysis
RESULTS
Physiological parameters
Serum T3 and cortisol concentrations
Liver tissue HSPs (27, 70 and 90) gene expression
Serum HPSs concentrations
DISCUSSION
CONCLUSION
CONFLICTS OF INTEREST
ACKNOWLEDGEMENTS
ORCID
REFERENCES

키워드

저자

• Youl-Chang Baek [ Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration ]
• Minseok Kim [ Department of Animal Science, College of Agriculture and Life Sciences, Chonnam National University ]
• Jin-Young Jeong [ Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration ]
• Young-Kyoon Oh [ Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration ]
• Sung-Dae Lee [ Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration ]
• Yoo-Kyung Lee [ Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration ]
• Sang-Yun Ji [ Animal Nutrition & Physiology Team, National Institute of Animal Science, Rural Development Administration ]
• Hyuck Choi [ Department of Pet Science, Seojeong College, Yangju 11429, Korea ] Corresponding Author

참고문헌

발행기관

간행물

관심저널 등록

• 간행물명

  Journal of Animal Reproduction and Biotechnology

• 간기

  계간

• pISSN

  2671-4639

• eISSN

  2671-4663

• 수록기간

  2019~2026

• 십진분류

  KDC 527 DDC 636