Inhibition of experimentally-induced liver cirrhosis in rats by a nonpeptidic mimetic of the extracellular matrix-associated Arg-Gly-Asp epitope

Rafael Bruck*, Rami Hershkoviz, Ofer Lider, Hussein Aeed, Liliana Zaidel, Zipora Matas, Jacob Barg, Zamir Halpern

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

36 Scopus citations

Abstract

Aims/Methods: In the present study, we examined whether a nonpeptidic mimetic of Arg-Gly-Asp (RGD), which specifically inhibits RGD-dependent adhesion of CD4+ T lymphocytes or fibroblasts to fibronectin, can prevent thioacetamide-induced liver cirrhosis in rats. The nonpeptidic RGD mimetic, rather than the RGD peptide was utilized, since the peptide is rapidly degraded, and therefore, relatively ineffective for in vivo use. Results: We now report that rats treated with thioacetamide and the RGD analogue SF-6,5 for 12 weeks had lower histopathologic scores than those treated with thioacetamide alone. Further improvement in liver histology was observed after another 8 weeks of treatment with the analogue SF-6,5. Quantitative microscopic analysis by computerized imaging morphometry of liver biopsies from the three groups and controls confirmed the semi-quantitative histopathologic scores (p < 0.001). After 3 months of treatment, the spleen weights in the SF-6,5-treated rats were 30% less than those of rats that received only thioacetamide, which indicated that the analogue-treated rats were less portal hypertensive. Conclusions: The observed inhibition of the progression of cirrhosis in rats by the nonpeptidic RGD analogue suggests that RGD mimetics may be useful therapeutically in inhibiting pathological processes that involve RGD recognition.

Original languageEnglish
Pages (from-to)731-738
Number of pages8
JournalJournal of Hepatology
Volume24
Issue number6
DOIs
StatePublished - Jun 1996

Keywords

  • Extracellular matrix
  • Fibronectin
  • Liver fibrosis
  • RGD analogue
  • Thioacetamide

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