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Dermal fibroblasts from pseudoxanthoma elasticum patients have raised MMP-2 degradative potential

Daniela Quaglino1, Luigi Sartor, Spiridione Garbisa

  • 1Department of Biomedical Sciences, University of Modena and Reggio Emilia, Via Campi 287, 41100 Modena, Italy. quaglino.daniela@unimore.it

Biochimica Et Biophysica Acta
|June 16, 2005
PubMed

Insights

Pseudoxanthoma elasticum (PXE) fibroblasts show increased matrix metalloproteinase-2 (MMP-2) activity, suggesting this enzyme contributes to connective tissue damage in PXE. This finding highlights MMP-2

Area of Science:

  • Biochemistry
  • Genetics
  • Dermatology

Background:

  • Pseudoxanthoma elasticum (PXE) is a genetic disorder affecting connective tissue.
  • Alterations in matrix metalloproteinases (MMPs) and their inhibitors (TIMPs) are implicated in connective tissue diseases.

Purpose of the Study:

  • To investigate the expression and activity of specific MMPs and TIMPs in cultured PXE fibroblasts.
  • To determine the role of MMP-2 in the connective tissue alterations observed in PXE.

Main Methods:

  • Cultured dermal fibroblasts from PXE patients and healthy controls were analyzed.
  • Enzyme activity, protein, and mRNA expression of MMP-2, MMP-3, MMP-9, MT1-MMP, TIMP-1, TIMP-2, and TIMP-3 were quantified.

Main Results:

  • MMP-2 mRNA and protein levels were significantly elevated in PXE fibroblasts compared to controls.
  • MMP-3, MMP-9, and TIMP-3 were undetectable in both groups.
  • MT1-MMP, TIMP-1, and TIMP-2 mRNA levels were similar between PXE and control fibroblasts.

Conclusions:

  • PXE fibroblasts exhibit an increased proteolytic potential, primarily due to elevated MMP-2.
  • MMP-2 is likely a key contributor to the connective tissue pathology in Pseudoxanthoma elasticum.

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