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Related Experiment Video

Updated: Aug 21, 2025

Cheek Injection Model for Simultaneous Measurement of Pain and Itch-related Behaviors
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Cheek Injection Model for Simultaneous Measurement of Pain and Itch-related Behaviors

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In vitro models for investigating itch.

Hendrik Mießner1,2, Judith Seidel2, Ewan St John Smith1

  • 1Department of Pharmacology, University of Cambridge, Cambridge, United Kingdom.

Frontiers in Molecular Neuroscience
|November 17, 2022
PubMed
Summary

Chronic itch (pruritus) is complex, making drug development challenging. This review explores advanced in vitro models, including stem cell and human primary cell approaches, to better understand itch mechanisms and develop new anti-pruritic therapies.

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Area of Science:

  • Biomedical research
  • Dermatology
  • Neuroscience

Background:

  • Chronic itch (pruritus) is a debilitating symptom in various diseases, often leading to skin damage from scratching.
  • Developing effective anti-pruritic medications is difficult due to the complex molecular pathways involving skin, immune, and nerve cells.
  • Current in vivo animal models have limitations, and human in vivo studies face ethical challenges, necessitating alternative research models.

Purpose of the Study:

  • To review the latest concepts in itch research.
  • To discuss the advantages and limitations of current in vitro models for studying pruritus.
  • To highlight the potential of advanced in vitro models, including stem cell-based and human primary cell approaches, for pre-clinical investigation.

Main Methods:

Keywords:
atopic dermatitisin vitroinduced pluripotent stem cellitchpreclinicalpruritussensory neuronsurrogate model

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  • Review of existing literature on in vitro models for itch research.
  • Analysis of 2D and 3D co-culture systems using sensory neurons, skin cells, and immune cells.
  • Evaluation of stem cell-based approaches and human primary cells as alternatives to traditional models.

    • Main Results:

    • In vitro models, while limited, offer insights into cell-cell interactions and molecular pathways involved in itch.
    • Advanced models incorporating stem cells and human primary cells provide more human disease-like systems.
    • These sophisticated in vitro models are crucial for investigating itch mechanisms and identifying new therapeutic targets.

    Conclusions:

    • There is a significant need for improved in vitro models to study complex itch mechanisms.
    • Advanced in vitro models, particularly those using human cells, offer promising avenues for pre-clinical research.
    • These models can contribute to the development of more effective anti-pruritic drugs to address unmet clinical needs.