Hypoxia-induced angiogenesis of cultured human salivary gland carcinoma cells enhances vascular endothelial growth factor production and basic fibroblast growth factor release

H. Ishibashi, T. Shiratuchi, K. Nakagawa, M. Onimaru, T. Sugiura, K. Sueishi, K. Shirasuna

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

The angiogenic activity of two human salivary gland tumor cell lines, ACCS from adenoid cystic carcinoma and IT-2 from mucoepidermoid carcinoma, was examined by stimulating tube formation by bovine capillary endothelial cells (BCE). ACCS and IT-2 were cultured in 20 or 3% oxygen, representing normoxic and hypoxic conditions, respectively, and conditioned medium (CM) was obtained from each culture. The BCE tubes stimulated by hypoxic CM were 1.59 (ACCS) and 1.42 (IT-2) times longer than those stimulated by normoxic CM. The tube-forming activity of CM was inhibited by preincubation with either anti-vascular endothelial growth factor (VEGF) IgG or anti-basic fibroblast growth factor (bFGF) IgG, suggesting that both VEGF and bFGF with angiogenic activity were present in the CM. This was confirmed by ELISA, which also demonstrated increased concentrations of both proteins in the hypoxic CM. Northern blot analysis showed an increased VEGF mRNA level in both carcinoma cells with hypoxia, while hypoxia did not affect the bFGF mRNA level in either cell line. The results suggest that both VEGF and bFGF are major angiogenesis factors in salivary gland tumors, and hypoxia-induced angiogenesis results from upregulation of VEGF and increased release of bFGF. Copyright (C) 2001 Elsevier Science Ltd.

Original languageEnglish
Pages (from-to)77-83
Number of pages7
JournalOral Oncology
Volume37
Issue number1
DOIs
Publication statusPublished - Jan 1 2001

All Science Journal Classification (ASJC) codes

  • Oral Surgery
  • Oncology
  • Cancer Research

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