Endothelial cell apoptosis is a primary pathogenetic event underlying skin lesions in avian and human scleroderma

Roswitha Sgonc, Matthias S. Gruschwitz, Hermann Dietrich, Heldrun Recheis, M. Eric Gershwin, Georg Wick

Research output: Contribution to journalArticle

306 Scopus citations

Abstract

The mechanism that may cause degenerative fibrotic skin lesions was studied in situ using skin biopsies from patients with systemic sclerosis (SSc), localized scleroderma, or keloids, and at the initial disease stage in the University of California at Davis (UCD) lines 200/206 chickens, which develop a hereditary systemic connective tissue disease resembling human SSc and permit study of disease stages not accessible in humans. Frozen skin sections were analyzed simultaneously for apoptosis by terminal deoxynucleotidyl transferase-mediated FITC-dUTP nick end labeling and indirect immunofluorescence staining of cell markers with tetramethylrhodamine isothiocyanate conjugates. The results showed that endothelial cells are clearly the first cells to undergo apoptosis in the skin of UCD-200/206 chickens, a process that seems to be induced by anti- endothelial cell antibodies. In human fibrotic skin diseases, apoptotic endothelial cells could only be detected in early inflammatory disease stages of SSc and localized scleroderma.

Original languageEnglish (US)
Pages (from-to)785-792
Number of pages8
JournalJournal of Clinical Investigation
Volume98
Issue number3
StatePublished - Aug 1 1996

Keywords

  • anti-endothelial cell antibodies
  • apoptosis
  • autoimmunity
  • systemic sclerosis
  • TUNEL

ASJC Scopus subject areas

  • Medicine(all)

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