title: Cyclooxygenase regulates angiogenesis induced by colon cancer cells.
abstract: To explore the role of cyclooxygenase (COX) in endothelial cell migration and angiogenesis, we have used two in vitro model systems involving coculture of endothelial cells with colon carcinoma cells. COX-2-overexpressing cells produce prostaglandins, proangiogenic factors, and stimulate both endothelial migration and tube formation, while control cells have little activity. The effect is inhibited by antibodies to combinations of angiogenic factors, by NS-398 (a selective COX-2 inhibitor), and by aspirin. NS-398 does not inhibit production of angiogenic factors or angiogenesis induced by COX-2-negative cells. Treatment of endothelial cells with aspirin or a COX-1 antisense oligonucleotide inhibits COX-1 activity/expression and suppresses tube formation. Cyclooxygenase regulates colon carcinoma-induced angiogenesis by two mechanisms: COX-2 can modulate production of angiogenic factors by colon cancer cells, while COX-1 regulates angiogenesis in endothelial cells.
authors.affiliation: Department of Medicine, Vanderbilt University Medical Center, VA Medical Center, Nashville, Tennessee 37232, USA.
authors.forename: M
authors.initials: M
authors.lastname: Tsujii
authors.forename: S
authors.initials: S
authors.lastname: Kawano
authors.forename: S
authors.initials: S
authors.lastname: Tsuji
authors.forename: H
authors.initials: H
authors.lastname: Sawaoka
authors.forename: M
authors.initials: M
authors.lastname: Hori
authors.forename: R N
authors.initials: RN
authors.lastname: DuBois
mesh_terms: D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000494:pharmacology; D018938:Caco-2 Cells; D002277:Carcinoma / Q000098:blood supply* / Q000473:pathology; D002450:Cell Communication; D002465:Cell Movement; D018920:Coculture Techniques; D003110:Colonic Neoplasms / Q000098:blood supply* / Q000473:pathology; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors / Q000494:pharmacology; D004730:Endothelium, Vascular / Q000166:cytology / Q000254:growth & development*; D006133:Growth Substances / Q000096:biosynthesis; D006801:Humans; D007527:Isoenzymes / Q000378:metabolism; D008565:Membrane Proteins; D051379:Mice; D008819:Mice, Nude; D008969:Molecular Sequence Data; D009374:Neoplasms, Experimental / Q000098:blood supply; D009389:Neovascularization, Pathologic; D011451:Prostaglandin-Endoperoxide Synthases / Q000378:metabolism*; D015854:Up-Regulation
chemical_list: D000894:Anti-Inflammatory Agents, Non-Steroidal; D000970:Antineoplastic Agents; D052246:Cyclooxygenase 2 Inhibitors; D016861:Cyclooxygenase Inhibitors; D006133:Growth Substances; D007527:Isoenzymes; D008565:Membrane Proteins; D051545:Cyclooxygenase 1; D051546:Cyclooxygenase 2; C496511:PTGS1 protein, human; C496540:PTGS2 protein, human; D011451:Prostaglandin-Endoperoxide Synthases; C496512:Ptgs1 protein, mouse