{"id":536,"date":"2026-03-30T13:33:16","date_gmt":"2026-03-30T04:33:16","guid":{"rendered":"https:\/\/www.eiiris.tut.ac.jp\/en\/?p=536"},"modified":"2026-04-06T13:37:16","modified_gmt":"2026-04-06T04:37:16","slug":"260330-paper","status":"publish","type":"post","link":"https:\/\/www.eiiris.tut.ac.jp\/en\/research-activities\/research-publication\/260330-paper\/","title":{"rendered":"Scientists discover oral compound that helps \u201creset\u201d the body clock forward -A potential breakthrough for jet lag and shift work-related sleep disorders-"},"content":{"rendered":"\r\n

A Japanese research team has discovered a new compound that can advance the body\u2019s internal clock\u2014offering hope for faster recovery from jet lag and better adaptation to night-shift work. The compound, called Mic-628, specifically activates the transcription of a clock gene named Period1 (Per1). When given orally to mice, it advanced their body clocks and activity rhythms, regardless of dosing time. The findings suggest a new approach to controlling circadian rhythms through drug action rather than light exposure.<\/p>\r\n

Key findings
A collaborative team including Emeritus Professor Tei H. (Kanazawa University), Associate Professor Takahata Y. (Osaka University), Professor Numano R. (Toyohashi University of Technology), and Associate Professor Uriu K. (Institute of Science Tokyo) discovered that Mic-628 selectively induces the mammalian clock gene Per1.
Mic-628 works by binding to the repressor protein CRY1, promoting the formation of a CLOCK\u2013BMAL1\u2013CRY1\u2013Mic-628 complex that activates Per1 transcription through a \u201cdual E-box\u201d DNA element. As a result, both the central clock in the brain\u2019s suprachiasmatic nucleus (SCN) and peripheral clocks in tissues such as the lungs were advanced\u2014in tandem and independent of dosing time.
In a simulated jet lag mouse model (6-hour light-dark phase advance), a single oral dose of Mic-628 shortened re-entrainment time from seven days to four. Mathematical modeling revealed that the compound\u2019s stable and unidirectional phase-advancing effect is mediated by a negative auto-regulatory feedback of the PER1 protein itself.<\/p>\r\n

Background and significance
Adapting to eastward travel, such as west-to-east transmeridian flights, or to night-shift work requires advancing the internal clock, a process that normally takes longer and is physiologically harder than delaying it. Existing methods, such as light therapy or melatonin, are heavily constrained by timing and often yield inconsistent results. Mic-628\u2019s consistent phase-advance effect, regardless of when it is administered, represents a new pharmacological strategy for resetting the circadian clock.<\/p>\r\n

What\u2019s next?
The researchers plan to investigate the safety and efficacy of Mic-628 in further animal and human studies. Because it reproducibly advances the body clock through a well-defined molecular mechanism, Mic-628 may serve as a prototype \u201csmart drug\u201d for managing jet lag, shift work-related sleep problems, and other circadian misalignment disorders.
These results will be published in the Proceedings of the National Academy of Sciences of the United States of America (PNAS) in 2026.<\/p>\r\n

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Bibliographic Information
Yoshifumi Takahata, Yuki Kasashima, Takuya Yoshioka, Shusei Yashiki, Justina Kulikauskaite, Tomoaki Matsuura, Yuki Ohba, Hideaki Hasegawa, Naoki Yuri, Nagisa Iwai, Nanako Otsu, Mikiya Kitakata, Yuta Kitaguchi, Haruki Furune, Chihiro Omori, Mutsumi Mukai, Yuki Komamura-Kohno, Yi-Ying Huang, Matsumi Hirose, Nobuya Koike, Yoichi Yamada, Kazuo Nakazawa, Kumiko Ui-Tei, Yoshiyuki Sakaki, Rika Numano*, Koichiro Uriu* & Hajime Tei*
*Corresponding author<\/p>\r\n

\u201dA Period1 inducer specifically advances circadian clock in mice\u201d,Proceedings of the National Academy of Sciences of the United States of America\uff08PNAS\uff09123(4):e2509943123 (2026).<\/p>\r\n

DOI number 10.1073\/pnas.2509943123.
URL\uff1awww.pnas.org\/doi\/10.1073\/pnas.2509943123<\/p>\r\n

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