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Updated: Jun 27, 2026

Isolation and Culture of Primary Mouse Keratinocytes from Neonatal and Adult Mouse Skin
10:51

Isolation and Culture of Primary Mouse Keratinocytes from Neonatal and Adult Mouse Skin

Published on: July 14, 2017

Modulation of keratinocyte-derived MMP-9 by IL-13: a possible role for the pathogenesis of epidermal inflammation

Rahul Purwar1, Melanie Kraus, Thomas Werfel

  • 1Department of Dermatology and Allergology, Hannover Medical School, Hannover, Germany.

The Journal of Investigative Dermatology
|June 29, 2007
PubMed

Insights

Interleukin-13 (IL-13) stimulates keratinocytes to release matrix metalloproteinase-9 (MMP-9), promoting leukocyte migration and contributing to skin inflammation in eczema.

Area of Science:

  • Dermatology
  • Immunology
  • Molecular Biology

Background:

  • Skin inflammation and remodeling are key in chronic eczematous diseases.
  • Matrix metalloproteinases (MMPs) influence tissue remodeling and cell migration by degrading extracellular matrix.

Purpose of the Study:

  • To investigate the effect of Interleukin-13 (IL-13) on matrix metalloproteinase (MMP) modulation in human primary keratinocytes (KCs).

Main Methods:

  • Stimulation of KCs with IL-13.
  • Analysis of MMP expression at mRNA and protein levels (MMP-9, MMP-3, MMP-2).
  • Assessment of active MMP-9 release using ELISA.
  • Evaluation of lymphocyte migration through basement membrane equivalents.
  • Examination of IL-13 and MMP-9 expression in lesional eczematous skin biopsies.

Main Results:

  • IL-13 stimulation upregulated MMP-9 mRNA and active MMP-9 release in KCs.
  • Increased lymphocyte migration was observed with IL-13-activated KCs.
  • MMP-9 expression and collagen type IV degradation were noted near the basement membrane in IL-13-treated skin.
  • Concomitant mRNA expression of MMP-9 and IL-13 was found in eczematous skin lesions.

Conclusions:

  • IL-13-induced MMP-9 release by keratinocytes may facilitate leukocyte migration into the epidermis.
  • This mechanism suggests a role for MMP-9 in IL-13-driven skin inflammation and pathogenesis of eczematous diseases.

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