{beta}2-adrenergic receptor-mediated negative regulation of group 2 innate lymphoid cell responses

The type 2 inflammatory response is induced by various environmental and infectious stimuli. Although recent studies identified group 2 innate lymphoid cells (ILC2s) as potent sources of type 2 cytokines, the molecular pathways controlling ILC2 responses are incompletely defined. Here we demonstrate that murine ILC2s express the β2-adrenergic receptor (β2AR) and colocalize with adrenergic neurons in the intestine. β2AR deficiency resulted in exaggerated ILC2 responses and type 2 inflammation in intestinal and lung tissues. Conversely, β2AR agonist treatment was associated with impaired ILC2 responses and reduced inflammation in vivo. Mechanistically, we demonstrate that the β2AR pathway is a cell-intrinsic negative regulator of ILC2 responses through inhibition of cell proliferation and effector function. Collectively, these data provide the first evidence of a neuronal-derived regulatory circuit that limits ILC2-dependent type 2 inflammation.

Source: ScienceNOW - March 1, 2018 Category: Science Authors: Moriyama, S., Brestoff, J. R., Flamar, A.-L., Moeller, J. B., Klose, C. S. N., Rankin, L. C., Yudanin, N. A., Monticelli, L. A., Putzel, G. G., Rodewald, H.-R., Artis, D. Tags: Immunology, Microbiology reports Source Type: news