Journal
JOURNAL OF EXPERIMENTAL MEDICINE
Volume 213, Issue 12, Pages 2567-2574Publisher
ROCKEFELLER UNIV PRESS
DOI: 10.1084/jem.20160723
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Funding
- Japan Society for the Promotion of Science [JP15H05656, JP15K15153]
- Ministry of Education, Culture, Sports, Science and Technology, Japan [JP15H01157]
- Japan Medical Association (the Medical Research Encouragement Prize)
- Uehara Memorial Foundation
- Naito Foundation
- Takeda Science Foundation
- Astellas Foundation for Research on Metabolic Disorders
- Mochida Memorial Foundation for Medical and Pharmaceutical Research
- SEN SHIN Medical Research Foundation
- Grants-in-Aid for Scientific Research [15K15153, 15H05656, 15H01157, 16K19154, 24111001] Funding Source: KAKEN
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Various aspects of the immune system display circadian rhythms. Although lymphocyte trafficking has been suggested to show diurnal variations, the mechanisms and influences on immune responses are unclear. Here, we show in mice that inputs from adrenergic nerves contribute to the diurnal variation of lymphocyte recirculation through lymph nodes (LNs), which is reflected in the magnitude of the adaptive immune response. Neural inputs to beta(2)-adrenergic receptors (beta(2)ARs) expressed on lymphocytes reduced the frequency of lymphocyte egress from LNs at night, which was accompanied by an increase of lymphocyte numbers in LNs. Immunization during the period of lymphocyte accumulation in LNs enhanced antibody responses. The diurnal variation of the humoral immune response was dependent on beta(2)AR-mediated neural signals and was diminished when lymphocyte recirculation through LNs was stopped. This study reveals the physiological role of adrenergic control of lymphocyte trafficking in adaptive immunity and establishes a novel mechanism that generates diurnal rhythmicity in the immune system.
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