• Spinal cord · Aug 2014

    Cerebrospinal fluid levels of glial cell-derived neurotrophic factor correlate with spinal cord stimulation frequency in patients with neuropathic pain: a preliminary report.

    • K F McCarthy and C McCrory.
    • 1] Department of Physiology, Trinity College Dublin, Dublin, Ireland [2] Department of Pain Medicine, St. James's Hospital, Dublin, Ireland.
    • Spinal Cord. 2014 Aug 1;52 Suppl 2:S8-10.

    Study DesignCase series.ObjectivesTo evaluate relationships between spinal cord stimulation (SCS) parameters and levels of glial cell-derived neurotrophic factor (GDNF).SettingAmbulatory pain clinic of St James's Hospital, Dublin, Ireland.MethodsNine patients with an implanted SCS and Failed Back Surgery Syndrome (FBSS) were administered the Brief Pain Inventory and Short Form (36) Health Survey. Following a lumbar puncture, levels of GDNF in cerebrospinal fluid (CSF) were assayed and correlated with stimulation parameters. Controls were patients with arthritic back pain who were matched for age, gender and SF-36 score.ResultsConcentrations of GDNF in CSF are higher in patients with FBSS than controls (P=0.002) and correlate with SCS frequency (P=0.029).ConclusionConcentrations of GDNF in CSF are higher in neuropathic pain and appear to be related to stimulation frequency. Further work is needed to evaluate this potential relationship, both in neuropathic pain and in other contexts such as locomotor dysfunction.

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