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Virchows Archiv A

, Volume 412, Issue 2, pp 161–168 | Cite as

The extracellular matrix in oral Kaposi sarcoma (AIDS): the immunohistochemical distribution of collagens type IV, V, VI, of procollagens type I and III, of laminin and of undulin

  • Jürgen Becker
  • Detlef Schuppan
  • Peter Reichart
Article

Summary

Twelve oral AIDS-associated Kaposi sarcomas (KS) were studied for the distribution of extracellular matrix components using indirect immunofluorescence. Staining for basement membrane (BM) components revealed two distinct patterns of distribution: a delicate and partly fragmented lining of BMs around sinusoid-like vascular spaces or an occasional diffuse interstitial fluorescence in the tumour stroma; or an irregular broad rim of fluorescence in walls of larger blood vessels. These findings support a vascular cell origin of the endothelial- and spindle cell component in KS. The tumour stroma was almost completely negative for collagen type V and undulin, whereas an intensive fluorescence was noted for procollagens type I, III and collagen type VI. In areas adjacent to KS a loss of procollagens type I and III, collagens type V, VI and undulin was noted. An intimal sheath of collagen type V was usually absent from blood vessels of the tumour or the peritumourous connective tissue. Immunohistochemical findings indicate that the preexisting interstitial connective tissue matrix is destroyed during tumour invasion and that subsequently procollagens type I, III and collagen type VI are synthesized de novo by cells of the tumour stroma.

Key words

AIDS Kaposi sarcoma Collagen Extracellular matrix Basement membrane 

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Copyright information

© Springer-Verlag 1987

Authors and Affiliations

  • Jürgen Becker
    • 1
  • Detlef Schuppan
    • 2
  • Peter Reichart
    • 1
  1. 1.Department of Oral Surgery, Faculty of DentistryFree University of BerlinBerlin 65
  2. 2.Steglitz Medical Center, Department of MedicineFree University of BerlinBerlin 41

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