Journal
AUTONOMIC NEUROSCIENCE-BASIC & CLINICAL
Volume 107, Issue 2, Pages 81-84Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S1566-0702(03)00134-6
Keywords
ganglia; spinal; calcitonin gene-related peptide; extracorporeal shock wave
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There have been several reports on the use of extracorporeal shock waves in the treatment of pseudarthrosis, calcifying tendinitis, and tendinopathies of the elbow. However, the pathomechanism of pain relief has not been clarified. To investigate the analgesic properties of shock wave application, we analyzed changes in calcitonin gene-related peptide (CGRP)-immunoreactive (ir) dorsal root ganglion (DRG) neurons. In the nontreated group, fluorogold-labeled dorsal root ganglion neurons innervating the most middle foot pad of hind paw were distributed in the L4 and L5 dorsal root ganglia. Of these neurons, 61% were CGRP-ir. However, in the shock wave-treated group, the percentage of FG-labeled CGRP-ir DRG neurons decreased to 18%. These data show that relief of clinical pain after shock wave application may result from reduced CGRP expression in DRG neurons. (C) 2003 Elsevier B.V. All rights reserved.
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