Annals of Occupational and Environmental Medicine

  • 제34권
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  • Pages.28.1-28.12
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  • 2022
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  • 1225-3618(pISSN)
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  • 2052-4374(eISSN)
대한직업환경의학회 (The Korean Society of Occupational & Environmental Medicine)
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The acclimatization of Haenyeo to a cold environment and occupational characteristics evaluated by orexin and irisin levels

  • Inho Lee (Department of Occupational and Environmental Medicine, Soonchunhyang University Cheonan Hospital) ;
  • Yong-Jin Lee (Department of Occupational and Environmental Medicine, Soonchunhyang University Cheonan Hospital) ;
  • Eun-Chul Jang (Department of Occupational and Environmental Medicine, Soonchunhyang University Cheonan Hospital) ;
  • Soon-Chan Kwon (Department of Occupational and Environmental Medicine, Soonchunhyang University Cheonan Hospital) ;
  • Young-Sun Min (Department of Occupational and Environmental Medicine, Soonchunhyang University Cheonan Hospital) ;
  • Jisuk Yun (Department of Occupational and Environmental Medicine, Soonchunhyang University Cheonan Hospital) ;
  • Taehwan Park (Department of Physiology, College of Medicine, Soonchunhyang University) ;
  • Hye-Jin Lee (Department of Physiology, College of Medicine, Soonchunhyang University) ;
  • Eonah Choo (Department of Physiology, College of Medicine, Soonchunhyang University) ;
  • Jeong-Beom Lee (Department of Physiology, College of Medicine, Soonchunhyang University)
  • 투고 : 2022.04.29
  • 심사 : 2022.09.20
  • 발행 : 2022.12.31
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초록

Background: Haenyeo is a woman who has the job of collecting seafood in the Jeju Sea at an average temperature of 13℃-14℃. The purpose of this study was to examine the cold acclimatization and occupational characteristics of Haenyeo through biomarkers such as orexin and irisin related to heat generation in the body. Methods: Twenty-one Haenyeo and 25 people with similar age, body type, and body mass index were selected as the control group (Control G). In the cold exposure experiment, a climate chamber was set to 5℃ and both feet were immersed in a 15℃ water tank for 30 minutes. Tympanic temperature (Tty) and skin temperature (Tsk) were measured, and the mean body temperature (mTb) was calculated. Blood samples were collected before and immediately after the examination. Orexin and irisin levels were analyzed. Results: Orexin levels were elevated after cold stimulation from 12.17 ± 4.44 to 12.95 ± 4.53 ng/mL (Haenyeo group [Haenyeo G], p < 0.01) and 10.37 ± 3.84 to 11.25 ± 4.02 ng/mL (Control G, p < 0.001). Irisin levels were elevated after cold stimulation from 4.83 ± 2.28 to 5.36 ± 2.23 ng/mL (Haenyeo G, p < 0.001) and 3.73 ± 1.59 to 4.18 ± 2.04 ng/mL (Control G, p < 0.001). The difference between Haenyeo G and Control G values in orexin and irisin appears not only in pre-exposure but also in post-exposure (p < 0.05). Conclusions: Our experimental results suggest that Haenyeo G were relatively superior in cold tolerance to Control G under cold exposure conditions. Haenyeo's cold acclimatization is due to the basic differences in pyrogens regarding body temperature control such as orexin and irisin. This means that Haenyeo are advantageous for cold survival.

키워드

과제정보

The authors thank the study subjects whose participation made this study possible. This research was supported by a grant (No.2016R1D1A3B02015394) from the Basic Science Research Program through the National Research Foundation (NRF) funded by the Ministry of Education, Republic of Korea.

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