PMID- 30885844 OWN - NLM STAT- MEDLINE DCOM- 20200521 LR - 20200521 IS - 1090-2139 (Electronic) IS - 0889-1591 (Linking) VI - 80 DP - 2019 Aug TI - Apical splenic nerve electrical stimulation discloses an anti-inflammatory pathway relying on adrenergic and nicotinic receptors in myeloid cells. PG - 238-246 LID - S0889-1591(18)31246-7 [pii] LID - 10.1016/j.bbi.2019.03.015 [doi] AB - The autonomic nervous system innervates all lymphoid tissues including the spleen therefore providing a link between the central nervous system and the immune system. The only known mechanism of neural inhibition of inflammation in the spleen relies on the production of norepinephrine by splenic catecholaminergic fibers which binds to beta2-adrenergic receptors (beta 2-ARs) of CD4(+) T cells. These CD4(+) T cells trigger the release of acetylcholine that inhibits the secretion of inflammatory cytokines by macrophages through alpha7 nicotinic acetylcholine receptor (alpha7nAchRs) signaling. While the vagal anti-inflammatory pathway has been extensively studied in rodents, it remains to be determined whether it coexists with other neural pathways. Here, we have found that three nerve branches project to the spleen in mice. While two of these nerves are associated with an artery and contain catecholaminergic fibers, the third is located at the apex of the spleen and contain both catecholaminergic and cholinergic fibers. We found that electrical stimulation of the apical nerve, but not the arterial nerves, inhibited inflammation independently of lymphocytes. In striking contrast to the anti-inflammatory pathway mechanism described so far, we also found that the inhibition of inflammation by apical nerve electrical stimulation relied on signaling by both beta 2-ARs and alpha7nAchRs in myeloid cells, with these two signaling pathways acting in parallel. Most importantly, apical splenic nerve electrical stimulation mitigated clinical symptoms in a mouse model of rheumatoid arthritis further providing the proof-of-concept that such an approach could be beneficial in patients with Immune-mediated inflammatory diseases. CI - Copyright (c) 2019 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Guyot, Melanie AU - Guyot M AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Simon, Thomas AU - Simon T AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Panzolini, Clara AU - Panzolini C AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Ceppo, Franck AU - Ceppo F AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Daoudlarian, Douglas AU - Daoudlarian D AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Murris, Emilie AU - Murris E AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Macia, Eric AU - Macia E AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Abelanet, Sophie AU - Abelanet S AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Sridhar, Arun AU - Sridhar A AD - Galvani Bioelectronics, Stevenage, United Kingdom. FAU - Vervoordeldonk, Margriet J AU - Vervoordeldonk MJ AD - Galvani Bioelectronics, Stevenage, United Kingdom. FAU - Glaichenhaus, Nicolas AU - Glaichenhaus N AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. FAU - Blancou, Philippe AU - Blancou P AD - Universite Cote d'Azur, CNRS, Institut de Pharmacologie Moleculaire et Cellulaire, France. Electronic address: blancou@ipmc.cnrs.fr. LA - eng PT - Journal Article DEP - 20190315 PL - Netherlands TA - Brain Behav Immun JT - Brain, behavior, and immunity JID - 8800478 RN - 0 (Receptors, Adrenergic) RN - 0 (Receptors, Nicotinic) RN - 0 (Tumor Necrosis Factor-alpha) RN - N9YNS0M02X (Acetylcholine) RN - X4W3ENH1CV (Norepinephrine) SB - IM MH - Acetylcholine/metabolism MH - Animals MH - Electric Stimulation MH - Female MH - Mice, Inbred C57BL MH - Mice, Transgenic MH - Myeloid Cells/*immunology MH - Norepinephrine/metabolism MH - Receptors, Adrenergic/*immunology MH - Receptors, Nicotinic/*immunology MH - Spleen/*immunology/*innervation/physiopathology MH - Tumor Necrosis Factor-alpha/immunology MH - Vagus Nerve/immunology MH - Vagus Nerve Stimulation OTO - NOTNLM OT - Anti-inflammatory pathway OT - Autonomous nervous system OT - Electrostimulation OT - Rheumatoid arthritis OT - Spleen OT - alpha7 acetylcholine receptor OT - beta2 adrenergic receptor EDAT- 2019/03/20 06:00 MHDA- 2020/05/22 06:00 CRDT- 2019/03/20 06:00 PHST- 2018/12/21 00:00 [received] PHST- 2019/03/07 00:00 [revised] PHST- 2019/03/14 00:00 [accepted] PHST- 2019/03/20 06:00 [pubmed] PHST- 2020/05/22 06:00 [medline] PHST- 2019/03/20 06:00 [entrez] AID - S0889-1591(18)31246-7 [pii] AID - 10.1016/j.bbi.2019.03.015 [doi] PST - ppublish SO - Brain Behav Immun. 2019 Aug;80:238-246. doi: 10.1016/j.bbi.2019.03.015. Epub 2019 Mar 15.