Title : Chronic nerve growth factor administration increases the peripheral exocytotic activity of capsaicin-sensitive cutaneous neurons.

Pub. Date : 2006 Aug 7

PMID : 16777323






6 Functional Relationships(s)
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1 Treatment of rats with NGF over a 13-day period produced a significant increase in capsaicin-evoked iCGRP release from isolated biopsies of hindpaw skin, as assessed by in vitro superfusion and RIA. Capsaicin nerve growth factor Mus musculus
2 This NGF enhancement of capsaicin-evoked iCGRP release was not due solely to increases in peripheral iCGRP content since only the 1mg/kg dose of NGF elevated cutaneous pools of iCGRP, whereas both doses significantly increased capsaicin-evoked peptide release. Capsaicin nerve growth factor Mus musculus
3 This NGF enhancement of capsaicin-evoked iCGRP release was not due solely to increases in peripheral iCGRP content since only the 1mg/kg dose of NGF elevated cutaneous pools of iCGRP, whereas both doses significantly increased capsaicin-evoked peptide release. Capsaicin nerve growth factor Mus musculus
4 This NGF enhancement of capsaicin-evoked iCGRP release was not due solely to increases in peripheral iCGRP content since only the 1mg/kg dose of NGF elevated cutaneous pools of iCGRP, whereas both doses significantly increased capsaicin-evoked peptide release. Capsaicin nerve growth factor Mus musculus
5 Moreover, NGF also enhanced capsaicin-evoked thermal hyperalgesia under similar dose- and time-related conditions. Capsaicin nerve growth factor Mus musculus
6 Collectively, the chronic administration of NGF not only increases capsaicin-evoked hyperalgesia, but also significantly primes peripheral fibers to enhanced peptidergic exocytosis following activation of the capsaicin receptor. Capsaicin nerve growth factor Mus musculus