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Related Experiment Video

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Human Dupuytren's Ex Vivo Culture for the Study of Myofibroblasts and Extracellular Matrix Interactions
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Matrix and cell phenotype differences in Dupuytren's disease.

Marike M van Beuge1, Evert-Jan P M Ten Dam2, Paul M N Werker3

  • 1Department of Pathology & Medical Biology, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9713 GZ Groningen, The Netherlands.

Fibrogenesis & Tissue Repair
|July 2, 2016
PubMed
Summary
This summary is machine-generated.

In Dupuytren's disease, the nodule is the active disease unit, showing more proliferating cells and macrophages. However, cord tissue has higher collagen type I levels due to differences in procollagen processing.

Keywords:
Collagen biosynthesisDupuytren’s diseaseFibroblastPCOLCE2

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Area of Science:

  • Hand surgery
  • Fibroproliferative diseases
  • Tissue engineering

Background:

  • Dupuytren's disease is a hand and finger fibroproliferative condition.
  • It presents with two distinct phenotypes: an initial nodule and a later cord.
  • These phenotypes lead to finger contracture.

Purpose of the Study:

  • To characterize and compare the distinct phenotypes of Dupuytren's disease.
  • To investigate cellular and molecular differences between nodule and cord tissues.
  • To understand the mechanisms underlying disease progression.

Main Methods:

  • Comparative analysis of matched nodule and cord tissues from ten Dupuytren's patients.
  • Cell proliferation assays, immunohistochemistry for macrophages and myofibroblasts (α-SMA).
  • Quantitative PCR (qPCR) for collagen gene expression, HPLC for collagen crosslinking, and procollagen processing analysis.

Main Results:

  • Nodule tissue exhibited higher cellular proliferation, macrophage (CD68+) infiltration, and myofibroblast (α-SMA+) presence.
  • Increased mRNA expression of COL1A1, COL1A2, COL5A1, and COL6A1 was observed in nodules.
  • Despite higher mRNA, nodules showed less collagen type I deposition, higher fibronectin, collagen type V, and procollagen 1, suggesting impaired procollagen processing.

Conclusions:

  • The nodule represents the active disease site in Dupuytren's disease, characterized by cellular proliferation and myofibroblast activity.
  • Differences in collagen type I deposition, despite elevated mRNA and procollagen levels in nodules, indicate a potential role for reduced procollagen processing.
  • Cord tissue demonstrates increased collagen type I and higher crosslinking, suggesting a more mature, fibrotic stage.