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Related Experiment Videos

Differentiation markers in hemangiopericytoma.

Z Nemes1

  • 1Department of Pathology, University Medical School of Debrecen, Hungary.

Cancer
|January 1, 1992
PubMed
Summary

Normal pericytes express factor XIIIa (F-XIII) and HLA-DR. These markers identify hemangiopericytomas (HPC) and suggest pericytes are primitive cells differentiating into various mesenchymal cells.

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Area of Science:

  • Immunohistochemistry
  • Tumor Biology
  • Cell Differentiation

Background:

  • Normal pericytes express factor XIIIa (F-XIII) and histocompatibility antigen HLA-DR.
  • Hemangiopericytomas (HPC) are tumors whose cellular origin is debated.
  • Understanding HPC differentiation is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To investigate the expression of F-XIII and HLA-DR in HPC and HPC-like tumors.
  • To determine if these markers can support the pericytic origin of HPC.
  • To explore the differentiation potential of pericytes.

Main Methods:

  • Immunohistochemical analysis of F-XIII, HLA-DR, and factor VIII-related antigen (F-VIII-R-Ag).
  • Study included 15 hemangiopericytomas and 16 other tumors with HPC-like patterns.
  • Comparison of marker expression between HPC and other tumor types.

Main Results:

  • A subpopulation of tumor cells in HPC consistently expressed F-XIII and HLA-DR, supporting a pericytic origin.
  • Meningeal and soft tissue HPC showed similar marker expression.
  • Most HPC-like tumors were negative for F-XIII and HLA-DR, except for malignant fibrous histiocytomas.
  • Occasional F-VIII-R-Ag positivity in HPC suggests potential endothelial differentiation.

Conclusions:

  • F-XIII and HLA-DR are reliable markers for identifying HPC and supporting their pericytic origin.
  • F-XIII can indicate fibrohistiocytic differentiation in HPC.
  • Pericytes exhibit multipotent differentiation capabilities, potentially giving rise to various mesenchymal cells.

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