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MSC Origin and Biomechanical Conditioning Determine ECM Maturation in Tissue-Engineered Matrix.

Michelle Klein1,2,3,4, Arian Ehterami1, Neguin Ranjbar1,5

  • 1Institute for Regenerative Medicine (IREM), University of Zurich, Wagistrasse 12, 8952 Schlieren, Switzerland.

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Summary
This summary is machine-generated.

Hydrodynamic stimulation enhances tissue-engineered matrix (TEM) development by improving extracellular matrix (ECM) deposition and collagen maturation. Umbilical cord-derived mesenchymal stromal cells (MSCs) showed the most advanced collagen maturation, while adipose-derived MSCs led to greater matrix thickening.

Keywords:
collagen maturationextracellular matrixhydrodynamic stimulationmesenchymal stromal cellstissue engineering

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Area of Science:

  • Biomaterials Science
  • Tissue Engineering
  • Cell Biology

Background:

  • The extracellular matrix (ECM) is crucial for the mechanical strength of tissue-engineered matrices (TEMs), especially for cardiovascular and load-bearing applications.
  • Mesenchymal stromal cells (MSCs) from different sources exhibit varying potentials for ECM formation.
  • Understanding these differences is key to developing effective TEMs.

Purpose of the Study:

  • To compare the ECM-forming potential of human adipose-derived (hADMSC), bone marrow-derived (hBMSC), and umbilical cord-derived MSCs (hUCMSC) for TEM development.
  • To evaluate the impact of static versus hydrodynamic culture conditions on TEM characteristics.
  • To identify optimal cell sources and culture methods for clinically relevant TEMs.

Main Methods:

  • Cells (hADMSC, hBMSC, hUCMSC, and human dermal fibroblasts as reference) were seeded onto PGA/P4HB scaffolds.
  • Cultures were maintained for 3 weeks under static or hydrodynamic (orbital shaking) conditions.
  • TEM development was assessed via macroscopic, histological, polarized light microscopy, and biochemical assays (DNA, GAGs, hydroxyproline).

Main Results:

  • Hydrodynamic stimulation consistently enhanced ECM deposition and collagen maturation across all cell types.
  • MSC-derived TEMs showed increased matrix thickening and more uniform ECM distribution under hydrodynamic conditions compared to static cultures.
  • Human dermal fibroblast-derived TEMs had higher total collagen but remained thinner; hUCMSC-derived TEMs exhibited superior collagen maturation and distribution.

Conclusions:

  • Both cell source and hydrodynamic stimulation are critical for optimizing ECM deposition and collagen maturation in TEMs.
  • hUCMSC-derived TEMs demonstrated advanced collagen maturation and uniform distribution under dynamic culture.
  • hADMSC-derived TEMs showed significant matrix thickening, highlighting the influence of cell source on TEM volumetric expansion and maturation.