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The skin is the largest organ of the human body and plays a crucial role in our sensory perception. It contains a vast network of sensory receptors that contribute to the skin's protective function by perceiving physical, biological, and environmental cues and generating relevant responses.
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Endoneurial-CD34 positive cells define an intermediate layer in human digital Pacinian corpuscles.

J García-Piqueras1, O García-Suárez1, M C Rodríguez-González2

  • 1Departamento de Morfología y Biología Celular, Grupo SINPOS, Universidad de Oviedo, Spain.

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Summary

Researchers identified distinct layers within human Pacinian corpuscles. An intermediate endoneurial layer separates the neural inner core from the non-neural outer core, clarifying their cellular origins.

Keywords:
CD34 antigenEndoneuriumHumanImmunohistochemistryPacinian corpuscles

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Area of Science:

  • Neuroscience
  • Histology
  • Cell Biology

Background:

  • The cellular origin of the outer core in human Pacinian corpuscles remains debated.
  • Understanding the distinct compartments of Pacinian corpuscles is crucial for neuroscience.

Purpose of the Study:

  • To investigate the cellular origin of the outer core in human digital Pacinian corpuscles.
  • To differentiate between endoneurial and perineurial contributions to Pacinian corpuscle structure.

Main Methods:

  • Utilized immunohistochemistry with specific antibodies against perineurial (Glucose transporter 1, epithelial membrane antigen) and endoneurial (CD34 antigen) markers.
  • Examined human digital Pacinian corpuscles to analyze marker expression patterns.

Main Results:

  • CD34 immunoreactivity, an endoneurial marker, was observed in a layer adjacent to the inner core.
  • The outer core of Pacinian corpuscles exhibited antigens characteristic of perineurial cells.
  • These findings reveal an intermediate endoneurial layer, dividing the corpuscle into distinct neural and non-neural compartments.

Conclusions:

  • Human Pacinian corpuscles possess a distinct intermediate endoneurial layer.
  • This layer separates the avascular inner neural compartment from the outer non-neural compartment.
  • The functional significance of this structural organization requires further investigation.