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MMP-13 regulates growth of wound granulation tissue and modulates gene expression signatures involved in

Mervi Toriseva1, Matti Laato, Olli Carpén

  • 1Department of Dermatology, University of Turku and Turku University Hospital, Turku, Finland.

Plos One
|August 11, 2012
PubMed

Insights

Matrix metalloproteinase-13 (MMP-13) is crucial for wound healing, coordinating granulation tissue growth, myofibroblast organization, and angiogenesis. Its absence impairs these processes, highlighting MMP-13

Area of Science:

  • Biochemistry
  • Cell Biology
  • Wound Healing Research

Background:

  • Proteinases, particularly matrix metalloproteinases (MMPs), are vital for wound healing.
  • Matrix metalloproteinase-13 (MMP-13) is implicated in regulating extracellular matrix remodeling and cell behavior during tissue repair.

Purpose of the Study:

  • To investigate the specific role of MMP-13 in granulation tissue formation and maturation.
  • To elucidate the impact of MMP-13 deficiency on cellular and molecular events during wound healing.

Main Methods:

  • Utilized a murine model with MMP-13 knockout (Mmp13(-/-)) and wild-type (WT) mice.
  • Implanted viscose cellulose sponges subcutaneously to induce granulation tissue formation.
  • Conducted histological analysis and gene expression profiling at days 7, 14, and 21.
  • Performed in vitro assays on Mmp13(-/-) mouse skin fibroblasts.

Main Results:

  • MMP-13 deficiency significantly reduced granulation tissue growth by 42% at day 21.
  • Mmp13(-/-) mice exhibited delayed myofibroblast organization, altered vascularization, and changes in inflammatory and angiogenic gene expression.
  • MMP-13 knockout fibroblasts showed impaired collagen gel contraction and reduced MMP-2 production.

Conclusions:

  • MMP-13 plays a critical role in coordinating cellular activities essential for granulation tissue growth and maturation.
  • MMP-13 influences myofibroblast function, inflammation, angiogenesis, and proteolysis during wound healing.
  • These findings underscore MMP-13's importance as a therapeutic target for enhancing wound repair.

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