Abstract
We determined the effects of etanercept on the serum concentrations of neuropeptides in RA patients. In a total of 11 patients who had been injected with etanercept, the serum levels of substance P, calcitonin gene-related peptide (CGRP), and gastrin-releasing peptide (GRP) were analyzed. Average levels of serum substance P were significantly reduced from 1.53 to 0.62 ng/ml after the injection of etanercept. In the CGRP and GRP analyses, these average levels dropped from 1.57 and 0.51 ng/ml to 0.44 and 0.04 ng/ml, respectively. Etanercept appears to decrease substance P levels with an improvement in disease activities.
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Origuchi, T., Iwamoto, N., Kawashiri, Sy. et al. Reduction in serum levels of substance P in patients with rheumatoid arthritis by etanercept, a tumor necrosis factor inhibitor. Mod Rheumatol 21, 244–250 (2011). https://doi.org/10.1007/s10165-010-0384-5
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DOI: https://doi.org/10.1007/s10165-010-0384-5