2013 Fiscal Year Final Research Report
Food entrainable circadian rhythm in humans
| Project/Area Number |
23390047
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Environmental physiology (including Physical medicine and Nutritional physiology)
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| Research Institution | Hokkaido University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
NISHIDE Shin-ya 北海道大学, 大学院・医学研究科, 助教 (40451398)
YAMANAKA Yujiro 北海道大学, 大学院・医学研究科, 助教 (20528343)
HASHIMOTO Satoko 北海道大学, 大学院・医学研究科, 学術研究員 (80374247)
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| Project Period (FY) |
2011-04-01 – 2014-03-31
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| Keywords | 生物時計 / 食事 / 生体リズム / コルチゾール / 睡眠 |
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| Research Abstract |
Appearance of premeal anticipatory hormone peak and entrainability of restricted meal schedule were examined in humans who stayed in a temporal isolation facility without knowing the time of day. Meal was supplied once a day for 10 days. As a result, the premeal peak was not detected in plasma melatonin, cortisol, insulin, ghrelin, and leptin. On the other hand, the sleep-wake cycle was entrained by the meal schedule, whereas the circadian melatonin rhythm was not entrained showing phase-delay shifts. These findings indicated that the so-called food entrainable circadian rhythm failed to appear in humans under the present conditions, and that the meal schedule was the time cue for the sleep-wake cycle but not for the circadian pacemaker.
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