alexa Epinephrine exacerbates arthritis by an action at presynaptic B2-adrenoceptors.
Immunology

Immunology

Journal of Clinical & Cellular Immunology

Author(s): Coderre TJ, Basbaum AI, Dallman MF, Helms C, Levine JD

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Abstract Sympathetic efferents contribute to the severity of joint injury in experimental arthritis in the rat, [Levine J. D. et al. (1986) J. Neurosci. 6, 3423-3429] and beta 2-adrenergic receptor antagonists suppress the disease [Levine J. D. et al. (1988) Proc. natn. Acad. Sci. U.S.A. 85, 4553-4556]. The present study was directed at determining the endogenous ligand for, and target of, the beta 2-receptor contribution to arthritis. We report that adrenal medullectomy significantly reduced joint injury in experimental arthritis, but that severe joint injury was re-established in adrenal medullectomized rats chronically treated with epinephrine or the beta 2-agonist, salbutamol. The ability of these two drugs to enhance joint injury in adrenal medullectomized rats was blocked by sympathectomy. These data suggest that adrenal medulla-derived epinephrine acts at beta 2-adrenoceptors on sympathetic efferent nerve terminals, to contribute to the severity of experimental arthritis.
This article was published in Neuroscience and referenced in Journal of Clinical & Cellular Immunology

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