Circadian clock mechanism driving mammalian photoperiodism.


Journal

Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555

Informations de publication

Date de publication:
27 08 2020
Historique:
received: 16 01 2020
accepted: 27 07 2020
entrez: 29 8 2020
pubmed: 29 8 2020
medline: 25 9 2020
Statut: epublish

Résumé

The annual photoperiod cycle provides the critical environmental cue synchronizing rhythms of life in seasonal habitats. In 1936, Bünning proposed a circadian-based coincidence timer for photoperiodic synchronization in plants. Formal studies support the universality of this so-called coincidence timer, but we lack understanding of the mechanisms involved. Here we show in mammals that long photoperiods induce the circadian transcription factor BMAL2, in the pars tuberalis of the pituitary, and triggers summer biology through the eyes absent/thyrotrophin (EYA3/TSH) pathway. Conversely, long-duration melatonin signals on short photoperiods induce circadian repressors including DEC1, suppressing BMAL2 and the EYA3/TSH pathway, triggering winter biology. These actions are associated with progressive genome-wide changes in chromatin state, elaborating the effect of the circadian coincidence timer. Hence, circadian clock-pituitary epigenetic pathway interactions form the basis of the mammalian coincidence timer mechanism. Our results constitute a blueprint for circadian-based seasonal timekeeping in vertebrates.

Identifiants

pubmed: 32855407
doi: 10.1038/s41467-020-18061-z
pii: 10.1038/s41467-020-18061-z
pmc: PMC7453030
doi:

Substances chimiques

ARNTL Transcription Factors 0
DNA-Binding Proteins 0
Melatonin JL5DK93RCL

Types de publication

Journal Article Research Support, Non-U.S. Gov't

Langues

eng

Sous-ensembles de citation

IM

Pagination

4291

Subventions

Organisme : Biotechnology and Biological Sciences Research Council
ID : BBP013759/1
Pays : United Kingdom
Organisme : Wellcome Trust
ID : 107851/Z/15/Z
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/N015584/1
Pays : United Kingdom
Organisme : Wellcome Trust
Pays : United Kingdom
Organisme : Biotechnology and Biological Sciences Research Council
ID : BB/N015347/1
Pays : United Kingdom

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Auteurs

S H Wood (SH)

Centre for Biological Timing, Faculty of Life Sciences, University of Manchester, Manchester, M13 9PT, UK.
Arctic Chronobiology and Physiology Research Group, Department of Arctic and Marine Biology, UiT - The Arctic University of Norway, Tromsø, 9037, Norway.

M M Hindle (MM)

The Roslin Institute, and Royal (Dick) School of Veterinary Studies University of Edinburgh, Roslin, Midlothian, EH25 9PRG, UK.

Y Mizoro (Y)

Centre for Biological Timing, Faculty of Life Sciences, University of Manchester, Manchester, M13 9PT, UK.

Y Cheng (Y)

UQ Genomics Initiative, The University of Queensland, Brisbane, QLD, 4072, Australia.
School of Life and Environmental Sciences, Faculty of Science, The University of Sydney, Camperdown, NSW, Australia.

B R C Saer (BRC)

Centre for Biological Timing, Faculty of Life Sciences, University of Manchester, Manchester, M13 9PT, UK.

K Miedzinska (K)

The Roslin Institute, and Royal (Dick) School of Veterinary Studies University of Edinburgh, Roslin, Midlothian, EH25 9PRG, UK.

H C Christian (HC)

University of Oxford, Department of Physiology, Anatomy and Genetics, Le Gros Clark Building, South Parks Road, Oxford, OX1 3QX, UK.

N Begley (N)

Centre for Biological Timing, Faculty of Life Sciences, University of Manchester, Manchester, M13 9PT, UK.

J McNeilly (J)

MRC Centre for Reproductive Health, Queen's Medical Research Institute, Edinburgh, EH16 4TJ, UK.

A S McNeilly (AS)

MRC Centre for Reproductive Health, Queen's Medical Research Institute, Edinburgh, EH16 4TJ, UK.

S L Meddle (SL)

The Roslin Institute, and Royal (Dick) School of Veterinary Studies University of Edinburgh, Roslin, Midlothian, EH25 9PRG, UK.

D W Burt (DW)

The Roslin Institute, and Royal (Dick) School of Veterinary Studies University of Edinburgh, Roslin, Midlothian, EH25 9PRG, UK.
UQ Genomics Initiative, The University of Queensland, Brisbane, QLD, 4072, Australia.

A S I Loudon (ASI)

Centre for Biological Timing, Faculty of Life Sciences, University of Manchester, Manchester, M13 9PT, UK. andrew.loudon@manchester.ac.uk.

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