Circadian Rhythm in the Cerebral Resistance to Hypoxia in Mice

The Japanese Journal of Pharmacology

Tohru Masukawa¹  Yoshihiro Tochino¹ 

[1] Department of Clinical Biochemistry, Faculty of Pharmaceutical Sciences, Setsunan University

关键词: Circadian rhythm;    Resistance to hypoxia;    Body temperature;    Blood glucose;    Survival time;   

DOI  :  10.1254/jjp.61.197

学科分类：药理学

来源: Nihon Yakuri Gakkai Henshuubu / Japanese Pharmacological Society

【 摘 要 】

References(18)Cited-By(3)The cerebral resistance to hypoxia in mice was investigated by measuring the survival time under both hypobaric and normobaric hypoxic conditions. In the ad libitum fed mice, there was a circadian variation in the survival time that was longer during the light period than during the dark period under hypobaric hypoxic conditions. The survival time under normobaric hypoxic conditions also exhibited a similar circadian variation in the ad libitum fed mice, whereas the rhythm of the survival time was completely reversed by the restriction of food presentation (9:00-15:00). These findings suggest that there is a circadian rhythm in the cerebral resistance of mice to hypoxia, which can be shifted by the time of food presentation. Furthermore, regression analyses revealed a negative correlation between the survival time of mice exposed to hypoxia and body temperature, and blood glucose levels. These indicate that the cerebral resistance to hypoxia was intimately associated with body temperature and blood glucose that both show a circadian rhythm in mice.

【 授权许可】

Unknown