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Pericyte differentiation

A M Schor1, A E Canfield, A B Sutton

  • 1CRC Department of Medical Oncology, Manchester University, Christie Hospital NHS Trust, UK.

Clinical Orthopaedics and Related Research
|April 1, 1995
PubMed
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Pericytes, cells in microvessel walls, can differentiate into bone-forming cells. These findings suggest pericytes may play a role in blood vessel mineralization during angiogenesis.

Area of Science:

  • Cell Biology
  • Vascular Biology
  • Biomineralization

Background:

  • Pericytes are microvascular wall cells integral to angiogenesis, but their precise function remains unclear.
  • Retinal pericytes possess distinct phenotypic characteristics differentiating them from other stromal cells.
  • Pericyte differentiation involves altered responses to growth factors and changes in extracellular matrix protein synthesis.

Purpose of the Study:

  • To investigate the differentiation potential of cultured pericytes.
  • To explore the relationship between pericyte differentiation and extracellular matrix mineralization.
  • To determine if pericytes contribute to in vivo mineralization processes.

Main Methods:

  • Culturing pericytes derived from retinal microvasculature.

Related Experiment Videos

  • Characterizing pericyte phenotype and distinguishing them from smooth muscle cells.
  • Assessing extracellular matrix formation and mineralization in vitro.
  • Analyzing changes in extracellular matrix protein deposition and growth factor responses during differentiation.

    • Main Results:

    • Cultured pericytes formed multicellular nodules rich in extracellular matrix.
    • Pericyte-associated matrix mineralized spontaneously in serum-containing growth medium.
    • Pericyte differentiation involved changes in extracellular matrix proteins (laminin, collagens, osteonectin, etc.) and response to TGF-β1.
    • These results indicate pericytes are primitive mesenchymal cells with osteogenic potential.

    Conclusions:

    • Pericytes can differentiate into an osteogenic phenotype in vitro.
    • Pericytes may contribute to the mineralization process observed in vivo during angiogenesis.