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Related Experiment Videos

Neurotrophin function in skin

M Bothwell1

  • 1Department of Physiology and Biophysics, University of Washington, Seattle 98195, USA.

The Journal of Investigative Dermatology. Symposium Proceedings
|August 1, 1997
PubMed
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Neurotrophins regulate skin innervation by sensory and sympathetic neurons. They also directly impact skin cells like melanocytes and keratinocytes, influencing their survival and proliferation.

Area of Science:

  • Neuroscience
  • Dermatology
  • Molecular Biology

Background:

  • Neurotrophins, including NGF, are crucial for neuronal development and function.
  • Skin innervation involves sensory and sympathetic neurons, mediating various modalities like pain and touch.
  • Neurotrophins interact with specific receptors (Trk, p75NTR) on both neuronal and non-neuronal cells.

Purpose of the Study:

  • To elucidate the specific roles of neurotrophins in regulating skin innervation.
  • To understand how neurotrophins influence non-neuronal skin cells.
  • To explore the receptor-mediated mechanisms underlying these effects.

Main Methods:

  • Analysis of neurotrophin and Trk receptor gene expression in sensory neurons.
  • Investigation of neurotrophin effects on melanocytes and keratinocytes in vitro.

Related Experiment Videos

  • Examination of the interplay between Trk and p75NTR signaling pathways.

    • Main Results:

    • Specific neurotrophin family members regulate distinct sensory modalities (nocioception, proprioception, mechanoreception).
    • Sensory neuron subpopulations express specific Trk neurotrophin receptors, enabling modality-specific innervation.
    • Neurotrophins directly affect skin cell survival and proliferation via Trk and p75NTR signaling.

    Conclusions:

    • Neurotrophins play a dual role in skin biology, regulating both neuronal innervation and non-neuronal cell functions.
    • Receptor specificity (Trk family) is key to modality-specific sensory innervation.
    • The interplay between Trk and p75NTR receptors mediates neurotrophin effects on skin cell homeostasis.