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A standardizable human-based psoriasis skin model for drug development.

Hanna Glasebach1, Steffen Rupp1, Anke Burger-Kentischer1

  • 1Fraunhofer Institute for Interfacial Engineering and Biotechnology IGB, Stuttgart, Germany.

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|July 18, 2025
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Summary

Researchers developed a new in vitro psoriasis model using STAT3-overexpressing keratinocytes. This model mimics disease hallmarks and enhances sensitivity to stimuli, aiding drug discovery for psoriasis.

Keywords:
STAT3T cellsin vitro skin modelnon-animal methodpsoriasis

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Area of Science:

  • Dermatology
  • Immunology
  • Cell Biology

Background:

  • Psoriasis is a chronic autoimmune disease affecting 2-3% of Western populations.
  • Effective new therapies require standardized, human-relevant disease models.
  • Signal transducer and activator of transcription 3 (STAT3) is crucial in psoriatic keratinocyte inflammation.

Purpose of the Study:

  • To establish a novel in vitro psoriasis model using STAT3-overexpressing human keratinocytes.
  • To assess the utility of this model for mimicking psoriatic hallmarks and drug screening.

Main Methods:

  • Overexpression of STAT3 in human keratinocytes.
  • Integration of these cells into an epidermis and immune cell-supplemented full-thickness skin model.
  • Evaluation of psoriasis-like phenotypes upon pro-inflammatory stimuli.

Main Results:

  • STAT3 overexpression alone induced the psoriasis marker S100A7 expression.
  • Models with STAT3-overexpressing keratinocytes showed enhanced psoriasis-like phenotypes.
  • These models exhibited increased sensitivity to cytokines and T cell integration.

Conclusions:

  • STAT3 overexpression in keratinocytes creates a pre-psoriatic phenotype and increases model sensitivity.
  • The novel in vitro model accurately reflects psoriatic hallmarks and genetic susceptibility.
  • This reproducible model is suitable for preclinical psoriasis drug screening and validation.