title: Effects of 15d-PGJ(2) on VEGF-induced angiogenic activities and expression of VEGF receptors in endothelial cells.
abstract: 15-Deoxy-Delta(12,14)-prostaglandin-J(2) (15d-PGJ(2)) upregulates expression of vascular endothelial growth factor (VEGF), but may inhibit angiogenesis. We found that 15d-PGJ(2) (1-10muM) attenuated all VEGF-induced angiogenic activities in human umbilical vein endothelial cells (HUVEC). It blocked almost completely cell proliferation, potently reduced migration, assembly into tube-like network on matrigel, and growth of capillaries into collagen gel. 15d-PGJ(2) inhibited expression of VEGFR-1 and VEGFR-2 receptors both at mRNA and protein levels. This inhibition, however, was transient (observed after 6-12h, but not after 24h) and weak (20-30%), and could not fully explain inhibition of response to VEGF. Accordingly, proliferation was inhibited when 15d-PGJ(2) was added 24h after VEGF or in cells stimulated with basic fibroblast growth factor. Interestingly, 15d-PGJ(2) decreased activities of c-jun and c-myc in HUVEC and overexpression of c-myc attenuated its antiproliferative effects. This suggests that inhibition of this transcription factor by 15d-PGJ(2) contributes to decrease in angiogenic response.
authors.affiliation: Medical Faculty, University of Vienna, Austria.
authors.forename: Philip
authors.initials: P
authors.lastname: Funovics
authors.forename: Christine
authors.initials: C
authors.lastname: Brostjan
authors.forename: Anneliese
authors.initials: A
authors.lastname: Nigisch
authors.forename: Anna
authors.initials: A
authors.lastname: Fila
authors.forename: Anna
authors.initials: A
authors.lastname: Grochot
authors.forename: Katarzyna
authors.initials: K
authors.lastname: Mleczko
authors.forename: Halina
authors.initials: H
authors.lastname: Was
authors.forename: Guenter
authors.initials: G
authors.lastname: Weigel
authors.forename: Jozef
authors.initials: J
authors.lastname: Dulak
authors.forename: Alicja
authors.initials: A
authors.lastname: Jozkowicz
mesh_terms: D043925:Angiogenesis Inducing Agents / Q000037:antagonists & inhibitors*; D020533:Angiogenesis Inhibitors / Q000494:pharmacology*; D002465:Cell Movement / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D015536:Down-Regulation; D042783:Endothelial Cells / Q000166:cytology / Q000187:drug effects / Q000378:metabolism*; D004730:Endothelium, Vascular / Q000166:cytology / Q000378:metabolism*; D048049:Extracellular Signal-Regulated MAP Kinases / Q000378:metabolism; D006801:Humans; D009024:Morphogenesis / Q000187:drug effects; D015230:Prostaglandin D2 / Q000031:analogs & derivatives* / Q000378:metabolism / Q000494:pharmacology; D016271:Proto-Oncogene Proteins c-myc / Q000378:metabolism; D012333:RNA, Messenger / Q000378:metabolism; D040262:Receptors, Vascular Endothelial Growth Factor / Q000378:metabolism*; D011994:Recombinant Proteins / Q000235:genetics / Q000378:metabolism; D013997:Time Factors; D014157:Transcription Factors / Q000378:metabolism; D014471:Umbilical Veins / Q000166:cytology; D042461:Vascular Endothelial Growth Factor A / Q000037:antagonists & inhibitors*
chemical_list: C477819:15-deoxyprostaglandin J2; D043925:Angiogenesis Inducing Agents; D020533:Angiogenesis Inhibitors; C489427:MYC protein, human; D016271:Proto-Oncogene Proteins c-myc; D012333:RNA, Messenger; D011994:Recombinant Proteins; D014157:Transcription Factors; D042461:Vascular Endothelial Growth Factor A; D040262:Receptors, Vascular Endothelial Growth Factor; D048049:Extracellular Signal-Regulated MAP Kinases; D015230:Prostaglandin D2