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Ligand-receptor assay for evaluation of functional activity of human recombinant VEGF and VEGFR-1 extracellular fragment

Research output: Contribution to journalArticlepeer-review

Abstract

cDNA encoding VEGF and Ig-like extracellular domains 2-4 of VEGFR-1 (sFlt-12-4) were cloned into prokaryotic expression vectors pET32a and pQE60. Recombinant proteins were purified (metal affinity chromatography) and renatured. Chemiluminescent study for the interaction of recombinant VEGF and sFlt-12-4 showed that biotinylated VEGF specifically binds to the polystyrene-immobilized receptor extracellular fragment. Biotinylated recombinant sFlt-1 interacts with immobilized VEGF. Analysis of the interaction of immobilized recombinant VEGFR-1 and VEGF with C6 glioma cells labeled with CFDA-SE (vital fluorescent dye) showed that recombinant VEGFR-1 also binds to native membrane-associated VEGF. Recombinant VEGF was shown to bind to specific receptors expressed on the surface of C6 glioma cells. Functional activity of these proteins was confirmed by ligand-receptor assay for VEGF and VEGFR-1 (sFlt-1) and quantitative chemiluminescent detection.

Original languageEnglish (US)
Pages (from-to)707-711
Number of pages5
JournalBulletin of Experimental Biology and Medicine
Volume152
Issue number6
DOIs
StatePublished - Apr 2012
Externally publishedYes

Keywords

  • Ligand-receptor assay
  • Vascular endothelial growth factor
  • Vascular endothelial growth factor receptor

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology

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