Baroreflex Activation in Conscious Rats Modulates the Joint Inflammatory Response Via Sympathetic Function

Overview

Journal Brain Behav Immun

Publisher Elsevier

Specialties Allergy & Immunology
Neurology
Psychiatry

Date 2015 May 20

PMID 25986215

Citations 21

Authors

Gabriel S Bassi

Fernanda Brognara

Jaci A Castania

Jhimmy Talbot

Thiago M Cunha

Fernando Q Cunha

Luis Ulloa

Alexandre Kanashiro

Daniel P Martins Dias

Helio C Salgado

Affiliations

Soon will be listed here.

Abstract

The baroreflex is a critical physiological mechanism controlling cardiovascular function by modulating both the sympathetic and parasympathetic activities. Here, we report that electrical activation of the baroreflex attenuates joint inflammation in experimental arthritis induced by the administration of zymosan into the femorotibial cavity. Baroreflex activation combined with lumbar sympathectomy, adrenalectomy, celiac subdiaphragmatic vagotomy or splenectomy dissected the mechanisms involved in the inflammatory modulation, highlighting the role played by sympathetic inhibition in the attenuation of joint inflammation. From the immunological standpoint, baroreflex activation attenuates neutrophil migration and the synovial levels of inflammatory cytokines including TNF, IL-1β and IL-6, but does not affect the levels of the anti-inflammatory cytokine IL-10. The anti-inflammatory effects of the baroreflex system are not mediated by IL-10, the vagus nerve, adrenal glands or the spleen, but by the inhibition of the sympathetic drive to the knee. These results reveal a novel physiological neuronal network controlling peripheral local inflammation.

Citing Articles

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Electroacupuncture activated local sympathetic noradrenergic signaling to relieve synovitis and referred pain behaviors in knee osteoarthritis rats.

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Brognara F, Castania J, Ribeiro A, Santos-Junior N, Salgado H Front Physiol. 2021; 12:745285.

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Brognara F, Castania J, Kanashiro A, Dias D, Salgado H Front Immunol. 2021; 12:637845.

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