Abstract:
:The transcription factor BMAL1 is a core component of the molecular clock, regulating biological pathways that drive 24 h (circadian) rhythms in behaviour and physiology. The molecular clock has a profound influence on innate immune function, and circadian disruption is linked with increased incidence of multiple sclerosis (MS). However, the mechanisms underlying this association are unknown. Here we show that BMAL1 and time-of-day regulate the accumulation and activation of various immune cells in a CNS autoimmune disease model, experimental autoimmune encephalomyelitis (EAE). In myeloid cells, BMAL1 maintains anti-inflammatory responses and reduces T cell polarization. Loss of myeloid BMAL1 or midday immunizations to induce EAE create an inflammatory environment in the CNS through expansion and infiltration of IL-1β-secreting CD11b+Ly6Chi monocytes, resulting in increased pathogenic IL-17+/IFN-γ+ T cells. These findings demonstrate the importance of the molecular clock in modulating innate and adaptive immune crosstalk under autoimmune conditions.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Sutton CE,Finlay CM,Raverdeau M,Early JO,DeCourcey J,Zaslona Z,O'Neill LAJ,Mills KHG,Curtis AMdoi
10.1038/s41467-017-02111-0subject
Has Abstractpub_date
2017-12-12 00:00:00pages
1923issue
1issn
2041-1723pii
10.1038/s41467-017-02111-0journal_volume
8pub_type
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