INCREASE IN SUBSTANCE-P AND CGRP, BUT NOT SOMATOSTATIN CONTENT OF INNERVATING DORSAL-ROOT GANGLIA IN ADJUVANT MONOARTHRITIS IN THE RAT

G D SMITH, A J HARMAR, D S MCQUEEN, J R SECKL

Research output: Contribution to journalArticlepeer-review

Abstract

Neuropeptides, synthesized in dorsal root ganglia (DRG), are implicated in nocioception and neurogenic inflammation. Alterations in DRG neuropeptide levels have been described in polyarthritic rats, but these models are associated with widespread systemic disease. Using mild adjuvant-mediated monoarthritis of the left carpal joint we found significant increases in substance P (+69%) and calcitonin gene-related peptide (CGRP; +204%), but not somatostatin in ipsilateral C6/7 DRG. Peptide levels in contralateral DRG and other ipsilateral DRG were unaltered. Substance P and CGRP in DRG may be of importance in the pathogenesis and maintenance of adjuvant arthritis.

Original languageEnglish
Pages (from-to)257-260
Number of pages4
JournalNeuroscience Letters
Volume137
Issue number2
Publication statusPublished - 30 Mar 1992

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