Sympathetic Neuronal Activation Triggers Myeloid Progenitor Proliferation and Differentiation

Publication date: Available online 26 June 2018
Source:Immunity
Author(s): Sathish Babu Vasamsetti, Jonathan Florentin, Emilie Coppin, Lotte C.A. Stiekema, Kang H. Zheng, Muhammad Umer Nisar, John Sembrat, David J. Levinthal, Mauricio Rojas, Erik S.G. Stroes, Kang Kim, Partha Dutta
There is a growing body of research on the neural control of immunity and inflammation. However, it is not known whether the nervous system can regulate the production of inflammatory myeloid cells from hematopoietic progenitor cells in disease conditions. Myeloid cell numbers in diabetic patients were strongly correlated with plasma concentrations of norepinephrine, suggesting the role of sympathetic neuronal activation in myeloid cell production. The spleens of diabetic patients and mice contained higher numbers of tyrosine hydroxylase (TH)-expressing leukocytes that produced catecholamines. Granulocyte macrophage progenitors (GMPs) expressed the β2 adrenergic receptor, a target of catecholamines. Ablation of splenic sympathetic neuronal signaling using surgical, chemical, and genetic approaches diminished GMP proliferation and myeloid cell development. Finally, mice lacking TH-producing leukocytes had reduced GMP proliferation, resulting in diminished myelopoiesis. Taken together, our study demonstrates that catecholamines produced by leukocytes and sympathetic nerve termini promote GMP proliferation and myeloid cell development.

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Teaser

Neural control of immunity and inflammation has been reported. Vasamsetti and colleagues demonstrate that the sympathetic nervous system controls the development of inflammatory myeloid cells from their progenitors in inflammatory conditions.


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