FAS1 domain protein inhibits VEGF165-induced angiogenesis by targeting the interaction between VEGFR-2 and αvβ3 integrin

Ju Ock Nam, Hye Nam Son, Eunsung Jun, Kiweon Cha, Byung Heon Lee, Rang Woon Park, In San Kim

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


It is known that VEGF receptors (VEGFR) and integrins interact with each other to regulate angiogenesis. We reported previously that the fasciclin 1 (FAS1) domain-containing protein, TGFBIp/βig-h3 (TGF-β-induced protein) is an angiogenesis regulator that inhibits both endothelial cell migration and growth via αvβ3 integrin. In an attempt to target the interaction between VEGFR-2 and αvβ3 integrin, we determined whether the FAS1 domain region of TGFBIp/βig-h3 (FAS1 domain protein) can block the interaction between the two receptors, leading to the suppression of angiogenesis. In this study, we showed that FAS1 domain protein inhibits VEGF165-induced endothelial cell proliferation and migration via αvβ3 integrin, resulting in the inhibition of VEGF 165-induced angiogenesis. We also defined a molecular mechanism by which FAS1 domain protein blocks the association between αvβ3 integrin and VEGFR-2, showing that it binds to αvβ3 integrin but not to VEGFR-2. Blocking the association of these major angiogenic receptors with FAS1 domain protein inhibits signaling pathways downstream of VEGFR-2. Collectively, our results indicate that FAS1 domain protein, in addition to its inhibitory effect on αvβ3 integrin-mediated angiogenesis, also inhibits VEGF165-induced angiogenesis. Thus, FAS1 domain protein can be further developed into a potent anticancer drug that targets two principal angiogenic pathways.

Original languageEnglish
Pages (from-to)1010-1020
Number of pages11
JournalMolecular Cancer Research
Issue number8
Publication statusPublished - 2012 Aug
Externally publishedYes

ASJC Scopus subject areas

  • Molecular Biology
  • Oncology
  • Cancer Research


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