Activation of cancer cell migration and invasion by ectopic synthesis of coagulation factor VII

Cancer Res. 2006 Oct 1;66(19):9453-60. doi: 10.1158/0008-5472.CAN-06-1803.

Abstract

Blood coagulation factor VII (fVII) is physiologically synthesized in the liver and released into the blood. Binding of fVII to tissue factor (TF) at sites of vascular injury triggers coagulation and hemostasis. TF/fVIIa complex formation on the surface of cancer cells plays important roles in cancer biology. Although fVII is synthesized by hepatocellular carcinoma, it remained unclear how TF/fVIIa complex formation and promigratory signaling can occur for most other cancers in extravascular locations. Here, we show by reverse transcription-PCR analysis that nonhepatic cancer cell lines constitutively express fVII mRNA and that endogenously synthesized fVIIa triggers coagulation activation on these cells. fVIIa expression in cancer cells is inducible under hypoxic conditions and hypoxia-inducible factor-2 alpha bound the promoter region of the FVII gene in chromatin immunoprecipitation analyses. Constitutive fVII expression in an ovarian cancer cell line enhanced both migration and invasion. Enhanced motility was blocked by anti-TF antibodies, factor Xa inhibition, and anti-protease-activated receptor-1 antibody treatment, confirming that TF/fVIIa stimulated migration by triggering cell signaling. This study shows that ectopic synthesis of fVII by cancer cells is sufficient to support proinvasive factor Xa-mediated protease-activated receptor-1 signaling and that this pathway is inducible under hypoxia.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Basic Helix-Loop-Helix Transcription Factors / physiology
  • Blood Coagulation
  • Carbon-Carbon Ligases / biosynthesis
  • Carbon-Carbon Ligases / genetics
  • Cell Hypoxia / genetics
  • Cell Line, Tumor / metabolism
  • Cell Movement / physiology
  • Factor VII / biosynthesis*
  • Factor VII / genetics
  • Factor VII / physiology
  • Factor Xa / physiology
  • Female
  • Humans
  • Neoplasm Invasiveness / physiopathology*
  • Neoplasm Proteins / biosynthesis*
  • Neoplasm Proteins / genetics
  • Neoplasm Proteins / physiology
  • Neoplasms / blood
  • Neoplasms / pathology
  • Ovarian Neoplasms / pathology
  • RNA, Messenger / biosynthesis
  • RNA, Messenger / genetics
  • RNA, Neoplasm / biosynthesis
  • RNA, Neoplasm / genetics
  • Receptor, PAR-1 / physiology
  • Recombinant Fusion Proteins / physiology
  • Reverse Transcriptase Polymerase Chain Reaction
  • Signal Transduction
  • Thromboplastin / biosynthesis
  • Thromboplastin / genetics
  • Transfection

Substances

  • Basic Helix-Loop-Helix Transcription Factors
  • Neoplasm Proteins
  • RNA, Messenger
  • RNA, Neoplasm
  • Receptor, PAR-1
  • Recombinant Fusion Proteins
  • endothelial PAS domain-containing protein 1
  • Factor VII
  • Thromboplastin
  • Factor Xa
  • Carbon-Carbon Ligases
  • glutamyl carboxylase