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Pro-neurotrophins, sortilin, and nociception
1Department of Neuroscience, Molecular Physiology of Somatic Sensation Group, Max-Delbrück Center for Molecular Medicine, Robert-Rössle Str. 10, 13122, Berlin, Germany.
The European Journal of Neuroscience
|February 6, 2014
Summary
Nerve growth factor (NGF) and its proforms signal through distinct pathways to regulate pain. This review explores how the proneurotrophin receptor system, involving sortilin and p75NTR, impacts inflammatory and neuropathic pain.
Area of Science:
- Neuroscience
- Pain Research
- Molecular Biology
Background:
- Nerve growth factor (NGF) is crucial for nociceptor development and function.
- NGF signaling contributes to inflammatory pain states like hyperalgesia.
- Traditional understanding implicates the TrkA receptor in NGF-mediated pain sensitization.
Purpose of the Study:
- To review the distinct functions of proneurotrophins (proNTs) in pain signaling.
- To explore the novel receptor system for proNTs, including sortilin and p75NTR.
- To examine the role of this new system in inflammatory and neuropathic pain, independent of or in concert with TrkA.
Main Methods:
- Literature review of studies on NGF, proneurotrophins, and their receptors.
- Analysis of research on pain mechanisms involving TrkA, sortilin, and p75NTR.
- Synthesis of findings related to inflammatory and neuropathic pain models.
Main Results:
- ProNTs possess biological functions distinct from mature NGF.
- ProNTs utilize a unique receptor complex comprising sortilin and p75NTR.
- This proNT receptor system may modulate pain independently or alongside the TrkA pathway.
Conclusions:
- The sortilin/p75NTR system represents a novel target for pain management.
- Understanding proNT signaling offers new therapeutic avenues for chronic pain conditions.
- Further research is needed to elucidate the precise interplay between TrkA and proNT pathways in pain.
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