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Recent studies have identified mtDNA as a potential genetic factor affecting cold adaptation. In addition, non-shivering thermogenesis (NST), a process closely related to mitochondrial dynamics, has also been suggested as an important factor affecting human response to cold. The present study aimed to clarify the relationship between mitochondrial haplogroup and NST during periods of mild cold exposure.Methods: Seventeen healthy university students (D: n = 8, non-D: n = 9) participated in the present study during summer and winter. A climate chamber was programmed so that ambient temperature inside dropped from 28°C to 16°C over the course of an 80-minute period. Physiological parameters were recorded throughout the course of the experiments.Results: Increases in VO2 were significantly greater during periods of cold exposure in winter than they were during periods of cold exposure in summer, and individuals from the D group exhibited greater winter values of ΔVO2 than individuals from the non-D group.Tre was significantly lower during periods of rest and cold exposure in winter; however, no significant difference was observed between Tre values of individuals in the D and non-D groups. In addition, although T-dist was significantly lower during periods of rest in winter than it was during those same periods in summer, no significant seasonal differences in values of T-dist were observed during periods of cold exposure.Conclusions: Results of the present study indicated that NST was greater in winter, and that the D group exhibited greater NST than the non-D group during winter. Despite the differences between groups in NST, no significant differences in rectal and skin temperatures were found between groups in either season. Therefore, it was supposed that mitochondrial DNA haplogroups had a greater effect on variation in energy expenditure involving NST than they had on insulative responses. 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Relationship between mitochondrial haplogroup and seasonal changes of physiological responses to cold
http://hdl.handle.net/10069/34935
http://hdl.handle.net/10069/349359ffabf4d-3d83-433e-a9f9-563ce0cf458a
名前 / ファイル | ライセンス | アクション |
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JPA33_1_27.pdf (975.8 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2014-12-10 | |||||
タイトル | ||||||
タイトル | Relationship between mitochondrial haplogroup and seasonal changes of physiological responses to cold | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Cold exposure | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | mtDNA haplogroup | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | NST | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | Seasonal acclimatization | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | VO2 | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
Nishimura, Takayuki
× Nishimura, Takayuki× Watanuki, Shigeki |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Background: Physiological responses to cold exhibit individual variation that can be affected by various factors, such as morphological characteristics, seasonal changes, and lifestyle; however, the genetic factors associated with this variation remain unclear. Recent studies have identified mtDNA as a potential genetic factor affecting cold adaptation. In addition, non-shivering thermogenesis (NST), a process closely related to mitochondrial dynamics, has also been suggested as an important factor affecting human response to cold. The present study aimed to clarify the relationship between mitochondrial haplogroup and NST during periods of mild cold exposure.Methods: Seventeen healthy university students (D: n = 8, non-D: n = 9) participated in the present study during summer and winter. A climate chamber was programmed so that ambient temperature inside dropped from 28°C to 16°C over the course of an 80-minute period. Physiological parameters were recorded throughout the course of the experiments.Results: Increases in VO2 were significantly greater during periods of cold exposure in winter than they were during periods of cold exposure in summer, and individuals from the D group exhibited greater winter values of ΔVO2 than individuals from the non-D group.Tre was significantly lower during periods of rest and cold exposure in winter; however, no significant difference was observed between Tre values of individuals in the D and non-D groups. In addition, although T-dist was significantly lower during periods of rest in winter than it was during those same periods in summer, no significant seasonal differences in values of T-dist were observed during periods of cold exposure.Conclusions: Results of the present study indicated that NST was greater in winter, and that the D group exhibited greater NST than the non-D group during winter. Despite the differences between groups in NST, no significant differences in rectal and skin temperatures were found between groups in either season. Therefore, it was supposed that mitochondrial DNA haplogroups had a greater effect on variation in energy expenditure involving NST than they had on insulative responses. Future studies are necessary in order to investigate more multiple candidate genes related to human cold adaptation and to elucidate the relationship between gene polymorphism and physiological polytypism. | |||||
書誌情報 |
Journal of Physiological Anthropology 巻 33, 号 1, p. 27, 発行日 2014-09-03 |
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出版者 | ||||||
出版者 | 日本生理人類学会 | |||||
出版者別言語 | ||||||
Japan Society of Physiological Anthropology | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 18806805 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1186/1880-6805-33-27 | |||||
権利 | ||||||
権利情報 | c 2014 Nishimura and Watanuki; licensee BioMed Central Ltd. | |||||
権利 | ||||||
権利情報 | This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
引用 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Journal of Physiological Anthropology, 33(1), 27; 2014 |