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Biological Rhythm Research Volume 50, 2019 - Issue 3
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Articles

Effects of L-serine supplementation on the daily rhythms of growth hormone and corticosterone concentrations in mice

Li WuDepartment of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China;Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
,
Xihong ZhouKey Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, ChinaCorrespondence[email protected]
,
Tiejun LiKey Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, China
,
Juyun HeDepartment of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China
,
Xue LinGuangzhou TanKe Industry Co., Ltd., Guangzhou, China
,
Linli HuangDepartment of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China
,
Zicheng OuyangDepartment of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China
,
Tao WeiDepartment of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China
&
Qinghua HeDepartment of Food Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, China;Key Laboratory of Agro-Ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, ChinaCorrespondence[email protected]
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Pages 366-374 | Received 22 Feb 2018, Accepted 01 Mar 2018, Published online: 22 Mar 2018
 
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Abstract

The impact of L-serine on the daily rhythms of growth hormone (GH) and corticosterone remains unknown. We explored whether the daily rhythms of these hormones were affected by L-serine supplementation as well as the supplementation time. The results showed that plasma GH concentration at Zeitgeber time (ZT)4 and 8 were significantly increased by L-serine supplementation at ZT22, while the diurnal rhythms peaks of plasma corticosterone at ZT12 were suppressed by L-serine supplementation at ZT10. After the supplementation was stopped, the effects of L-serine on the diurnal rhythms of plasma GH and corticosterone lasted for 2 days then they were fading on day 4. L-serine concentrations in plasma and hypothalamus after supplementation at ZT22 was lower than those after supplementation at ZT10. In conclusion, L-serine modulates the daily rhythms of GH and corticosterone depending on its supplementation time. The modulation effect might be association with the daily rhythms of L-serine metabolism.

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