@article{4af2a7298d124140b086c6421613de70,
title = "In vitro circadian period is associated with circadian/sleep preference",
abstract = "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 vitrorhythm (in vitroperiod) was compared with the intrinsic circadian period, τ, measured under a forced desynchrony protocol (in vivoperiod) and circadian/sleep parameters evaluated by questionnaires, sleep log, and actigraphy. Although no significant correlation was observed between the in vitroand in vivoperiods, the in vitroperiod was correlated with chronotype, habitual sleep time, and preferred sleep time. Our data demonstrate that thein vitroperiod is significantly correlated with circadian/sleep preference. The findings suggest that fibroblasts from individual patients can be utilized for in vitroscreening of therapeutic agents to provide personalized therapeutic regimens for CRSD patients.",
author = "Akiko Hida and Shingo Kitamura and Yosuke Ohsawa and Minori Enomoto and Yasuko Katayose and Yuki Motomura and Yoshiya Moriguchi and Kentaro Nozaki and Makiko Watanabe and Sayaka Aritake and Shigekazu Higuchi and Mie Kato and Yuichi Kamei and Shin Yamazaki and Goto, {Yu Ichi} and Masaaki Ikeda and Kazuo Mishima",
note = "Funding Information: We thank Junko Takei for training in primary cell culture and Dr. Hajime Tei for technical support. A part of this study is the result of {\textquoteleft}{\textquoteleft}Understanding of molecular and environmental bases for brain health{\textquoteright}{\textquoteright} carried out under the Strategic Research Program for Brain Sciences from the Ministry of Education, Culture, Sports, Science and Technology of Japan. This study was supported by Grants-in-Aid for Scientific Research (#21390335, #22791161 and #24621015) from Japan Society for the Promotion of Science, an Intramural Research Grant (#23-3) for Neurological and Psychiatric Disorders of National Center of Neurology and Psychiatry, a Grant-in-Aid (H22-SeisakuSouyaku-Ippan-013) from the Ministry of Health, Labour and Welfare and a Grant from Takeda Research Foundation.",
year = "2013",
month = jun,
day = "25",
doi = "10.1038/srep02074",
language = "English (US)",
volume = "3",
journal = "Scientific reports",
issn = "2045-2322",
publisher = "Nature Publishing Group",
}