A high-light therapy restores the circadian clock and corrects the pathological syndrome generated in restricted-fed mice.
Fiche publication
Date publication
août 2024
Journal
Proceedings of the National Academy of Sciences of the United States of America
Auteurs
Membres identifiés du Cancéropôle Est :
Pr CHAMBON Pierre
Tous les auteurs :
Damara M, Misra N, Chambon P
Lien Pubmed
Résumé
Time-restricted feeding (RF) is known to shift the phasing of gene expression in most primary metabolic tissues, whereas a time misalignment between the suprachiasmatic nucleus circadian clock (SCNCC) and its peripheral CCs (PCC's) is known to induce various pathophysiological conditions, including a metabolic syndrome. We now report that a unique "light therapy," involving different light intensities (T150-T700 lx, T75-T150 lx, and T350-T700 lx), realigns the RF-generated misalignment between the SCNCC and the PCC's. Using such high-light regime, we show that through shifting the SCNCC and its activity, it is possible in a RF and "night-shifted mouse model" to prevent/correct pathophysiologies (e.g., a metabolic syndrome, a loss of memory, cardiovascular abnormalities). Our data indicate that such a "high-light regime" could be used as a unique chronotherapy, for those working on night shifts or suffering from jet-lag, in order to realign their SCNCC and PCC's, thereby preventing the generation of pathophysiological conditions.
Mots clés
SCN, circadian clock, high-light, metabolic syndrome, realignment
Référence
Proc Natl Acad Sci U S A. 2024 08 6;121(32):e2403770121