Cited by 89Pain Mechanisms and TreatmentsIon Channels and ReceptorsNerve injury and regeneration

NGF-mediated sensitization of the excitability of rat sensory neurons is prevented by a blocking antibody to the p75 neurotrophin receptor

Zhang, Y.H, Nicol, Grant D·2004·Neuroscience Letters

Abstract

Nerve growth factor (NGF) can play a causal role in the initiation of hyperalgesia. Recent work demonstrates that NGF can act directly on nociceptive sensory neurons to augment their sensitivity to a variety of stimuli. Based on the existing literature, it is not clear whether this sensitization is mediated by the high-affinity TrkA receptor or the low-affinity p75 neurotrophin receptor. We examined whether a blocking antibody to the p75 neurotrophin receptor can prevent the NGF-induced enhancement of excitability in capsaicin-sensitive small-diameter sensory neurons that have been isolated from the adult rat. In this report, pretreatment with the p75 blocking antibody completely prevents the NGF-induced increase in the number of action potentials evoked by a ramp of depolarizing current as well as the suppression of a delayed rectifier-type of potassium current(s) in these neurons. Although the sensitization by NGF was blocked, the antibody had no effect on the capacity of ceramide, a putative downstream signaling molecule, to either enhance the excitability or inhibit the potassium current. These results indicate that NGF can increase the excitability of nociceptive sensory neurons through activation of the p75 neurotrophin receptor and its consequent liberation of ceramide from neuronal sphingomyelins.

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Crossref · 10.1016/j.neulet.2004.05.042

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Authors
Zhang, Y. H., & Nicol, G. D.
Affiliations
Indiana University Indianapolis (US)
Corresponding author
Nicol, Grant D
Venue
Neuroscience Letters
Publisher
Elsevier BV
Published
2004-08
Volume
366
Issue
2
Pages
187-192
ISSN
0304-3940 (ISSN-L)
OpenAlex
W2062227896
Cited by
88
References
25
Citations by year
2024: 2 · 2023: 1 · 2022: 3 · 2021: 3 · 2020: 6 · 2019: 1 · 2018: 2 · 2017: 2 · 2016: 4 · 2015: 4 · 2014: 5 · 2013: 3 · 2012: 2
FWCI
4.74
Type
journal article
Language
en
Open access
closed
Locations
  • Neuroscience Letters (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Neurological Disorders and Stroke (NS046084, R01NS046084)
Topics
  • Health Sciences › Medicine › Physiology › Pain Mechanisms and Treatments
  • Life Sciences › Neuroscience › Sensory Systems › Ion Channels and Receptors
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nerve injury and regeneration
Keywords
nerve growth factor, p75 neurotrophin receptor, sensory neuron excitability, nociceptors, hyperalgesia, TrkA, blocking antibodies, delayed rectifier potassium current, capsaicin-sensitive neurons, ceramide, sphingomyelin, neurotrophin signaling
MeSH terms
Action Potentials, Animals, Antibodies, Cells, Cultured, Ganglia, Spinal, Male, Nerve Growth Factors, Neurons, Afferent, Potassium Channels, Rats, Sprague-Dawley, Receptors, Nerve Growth Factor, Patch-Clamp Techniques, Receptor, Nerve Growth Factor, Rats

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