The β2-adrenergic receptor controls inflammation by driving rapid IL-10 secretion.

Autor: Ağaç D; Department of Immunology, UT Southwestern Medical Center, Dallas, TX, United States., Estrada LD; Department of Immunology, UT Southwestern Medical Center, Dallas, TX, United States., Maples R; Department of Immunology, UT Southwestern Medical Center, Dallas, TX, United States., Hooper LV; Department of Immunology, UT Southwestern Medical Center, Dallas, TX, United States; Howard Hughes Medical Institute, United States., Farrar JD; Department of Immunology, UT Southwestern Medical Center, Dallas, TX, United States. Electronic address: david.farrar@utsouthwestern.edu.
Jazyk: angličtina
Zdroj: Brain, behavior, and immunity [Brain Behav Immun] 2018 Nov; Vol. 74, pp. 176-185. Date of Electronic Publication: 2018 Sep 05.
DOI: 10.1016/j.bbi.2018.09.004
Abstrakt: The mammalian nervous system communicates important information about the environment to the immune system, but the underlying mechanisms are largely unknown. Secondary lymphoid organs are highly innervated by sympathetic neurons that secrete norepinephrine (NE) as the primary neurotransmitter. Immune cells express adrenergic receptors, enabling the sympathetic nervous system to directly control immune function. NE is a potent immunosuppressive factor and markedly inhibits TNF-α secretion from innate cells in response to lipopolysaccharide (LPS). In this study, we demonstrate that NE blocks the secretion of a variety of proinflammatory cytokines by rapidly inducing IL-10 secretion from innate cells in response to multiple Toll-like receptor (TLR) signals. NE mediated these effects exclusively through the β2-adrenergic receptor (ADRB2). Consequently, Adrb2 -/- animals were more susceptible to L. monocytogenes infection and to intestinal inflammation in a dextran sodium sulfate (DSS) model of colitis. Further, Adrb2 - / - animals rapidly succumbed to endotoxemia in response to a sub-lethal LPS challenge and exhibited elevated serum levels of TNF-α and reduced IL-10. LPS-mediated lethality in WT animals was rescued by administering a β 2-specific agonist and in Adrb2 -/- animals by exogenous IL-10. These findings reveal a critical role for ADRB2 signaling in controlling inflammation through the rapid induction of IL-10. Our findings provide a fundamental insight into how the sympathetic nervous system controls a critical facet of immune function through ADRB2 signaling.
(Copyright © 2018 Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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