In vitro circadian period is associated with circadian/sleep preference.

Akiko Hida*, Shingo Kitamura, Yosuke Ohsawa, Minori Enomoto, Yasuko Katayose, Yuki Motomura, Yoshiya Moriguchi, Kentaro Nozaki, Makiko Watanabe, Sayaka Aritake, Shigekazu Higuchi, Mie Kato, Yuichi Kamei, Shin Yamazaki, Yu Ichi Goto, Masaaki Ikeda, Kazuo Mishima

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


Evaluation of circadian phenotypes is crucial for understanding the pathophysiology of diseases associated with disturbed biological rhythms such as circadian rhythm sleep disorders (CRSDs). We measured clock gene expression in fibroblasts from individual subjects and observed circadian rhythms in the cells (in vitro rhythms). Period length of the in vitro rhythm (in vitro period) was compared with the intrinsic circadian period, τ, measured under a forced desynchrony protocol (in vivo period) and circadian/sleep parameters evaluated by questionnaires, sleep log, and actigraphy. Although no significant correlation was observed between the in vitro and in vivo periods, the in vitro period was correlated with chronotype, habitual sleep time, and preferred sleep time. Our data demonstrate that the in vitro period is significantly correlated with circadian/sleep preference. The findings suggest that fibroblasts from individual patients can be utilized for in vitro screening of therapeutic agents to provide personalized therapeutic regimens for CRSD patients.

Original languageEnglish
Pages (from-to)2074
Number of pages1
JournalScientific Reports
Publication statusPublished - 2013
Externally publishedYes

ASJC Scopus subject areas

  • General


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