The Effects of Nocturnal Life on the Circadian Patterns of Sex Hormones in Young Healthy Men
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概要
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Irregular meals (mainly the skipping of breakfast) and inadequate sleep has become prevalent in young people. However, there has been inadequate attention on the adverse effects of this nocturnal life. We observed the 24-hr patterns of sex hormones and other relative hormones in ten medical students, with the randomized cross-over design, on either a diurnal life or a nocturnal life. The subjects on a diurnal life ate three meals (07 : 00, 13 : 00 and 19 : 00) and slept from 22 : 30 to 06 : 30. Nocturnal life was designed by skipping their breakfast but consuming a lot (> 50% of their daily food intake) in the evening and at night, sleeping from 01 : 30 to 08 : 30 the next morning. After three weeks in the experimental life, the 24-hr plasma concentrations of testosterone, free testosterone, dihydrotestosterone (DHT), androstenedione, prolactin, estrone, luteinizing hormone, cortisol and sex hormone binding globulin (SHBG) were measured every three hours. Plasma free testosterone and prolactin decreased, but cortisol increased when subjects followed the nocturnal life. In the diurnal lifestyle group, circadian rhythms were observed in the androgens (testosterone, free testosterone, DHT, androstenedione), prolactin, cortisol and SHBG in the cosinor analysis ; however, circadian rhythms were almost extinguished in the nocturnal lifestyle group. Since sex hormones play important roles in the normal physiological condition, the effects of these changes in hormone concentration and its circadian rhythm should be considered and studied intensively.
- 社団法人日本薬学会の論文
- 2005-02-01
著者
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HOSHI KAZUHIKO
Department of Obstetrics and Gynecology, Faculty of Medicine, University of Yamanashi
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Wang Pei-yu
Department Of Social Medicine And Health Education School Of Public Health Peking University
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QIN LI-QIANG
Department of Nutrition and Food Hygiene, School of Radiation Medicine and Public Health, Soochow Un
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XU JIA-YING
Department of Nutrition and Food Hygiene, School of Radiation Medicine and Public Health, Soochow Un
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KANEKO TAKASHI
Department of Environmental Health, School of Medicine, Yamanashi University
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Li Jue
Department of Environmental Health, School of Medicine, University of Yamanashi
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Wang Jing
Department of Environmental Health, School of Medicine, University of Yamanashi
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Li Jue
Department Of Cardiology Tongji Hospital Of Tongji University
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Li Jue
Department Of Environmental Health School Of Medicine University Of Yamanashi:heart Lung And Blood V
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Qin Li-qiang
Jiangsu Provincial Key Lab. Of Radiation Medicine And Protection
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Kaneko Takashi
Department Of Environmental Health School Of Medicine Yamanashi University
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Wang Jing
College Of Medicine Tongji University
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Wang P‐y
Department Of Social Medicine And Health Education School Of Public Health Peking University
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Wang Pei-yu
中華人民共和国
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Hoshi Kazuhiko
Department Of Obstetrics And Gynecology School Of Medicine University Of Yamanashi
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Hoshi Kazuhiko
Department Of Obstetrics And Gynecology
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Xu Jia-ying
Department Of Nutrition And Food Hygiene School Of Radiation Medicine And Public Health Soochow Univ
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Wang Pei-yu
Department Of Preventive Medicine And Health Education School Of Public Health Beijing University
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Wang Jing
Heart Lung And Blood Vessel Center College Of Medicine Tongji University
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Wang Jing
Department Of Echocardiography Union Hospital Tongji Medical College Huazhong University Of Science
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Qin Li-qiang
Department Of Nutrition And Food Hygiene School Of Radiation Medicine & Public Health Soochow Un
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Kaneko Takashi
Department Of Chemistry And Chemical Engineering Faculty Of Engineering Niigata University
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Kaneko Takashi
Department Of Applied Biological Science Science University Of Tokyo
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Wang Jing
Department Of Biological Sciences Texas Tech University
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KANEKO Takashi
Department of Environmental Health, Yamanashi Medical University
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WANG Pei-Yu
Department of Environmental Health, Yamanashi Medical University
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