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Updated: Jan 2, 2026

Cheek Injection Model for Simultaneous Measurement of Pain and Itch-related Behaviors
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Bringing on the itch.

Daniel A Waizman1, Sourav Ghosh2, Carla V Rothlin1

  • 1Department of Immunobiology, Yale School of Medicine, Yale University, New Haven, United States.

Elife
|November 30, 2019
PubMed
Summary
This summary is machine-generated.

Neutrophils are the first immune cells to infiltrate the skin, triggering itch in atopic dermatitis. This study identifies their crucial role in this common skin condition.

Keywords:
atopic dermatitischronic itchimmunologyinflammationitchmouseneuroimmuneneuroscienceneutrophilssomatosensory

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Area of Science:

  • Immunology
  • Dermatology
  • Cell Biology

Background:

  • Atopic dermatitis is a prevalent inflammatory skin condition characterized by intense pruritus.
  • The precise cellular mechanisms driving itch in atopic dermatitis remain incompletely understood.

Purpose of the Study:

  • To investigate the role of neutrophils in the pathogenesis of itch in atopic dermatitis.
  • To identify the early cellular players involved in initiating the itch response in this condition.

Main Methods:

  • Utilized murine models of atopic dermatitis.
  • Employed immunohistochemistry and flow cytometry to analyze immune cell infiltration in skin.
  • Assessed itch-related behaviors in response to neutrophil depletion.

Main Results:

  • Neutrophils were identified as the predominant immune cells infiltrating the skin during the early stages of atopic dermatitis.
  • Increased neutrophil presence correlated with heightened itch behaviors.
  • Depletion of neutrophils significantly reduced scratching and other itch-related behaviors.

Conclusions:

  • Neutrophils are key initiators of itch in atopic dermatitis.
  • Targeting neutrophils may represent a novel therapeutic strategy for managing itch in patients with atopic dermatitis.