title: Modulation of VEGF-induced endothelial cell cycle protein expression through cyclic AMP hydrolysis by PDE2 and PDE4.
abstract: Endothelial cell proliferation in response to VEGF plays an important role in physiological and pathological angiogenesis. The role of PDE2 and PDE4 in VEGF-induced proliferation in HUVEC was investigated: 1) VEGF increased cAMP-hydrolytic activity by up-regulating the expression of PDE2 and PDE4 isozymes; 2) VEGF increased progression in cell cycle with an increase in p42/p44 MAP kinase, cyclin A and cyclin D1 expressions and with a decrease in p21 waf1/cip1 and p27 kip1 expressions; 3) EHNA (20 micro M), a selective PDE2 inhibitor, RP73401 (10 micro M), a selective PDE4 inhibitor blocked the VEGF-induced increase in p42/p44 MAP kinase expression; 4) RP73401, but not EHNA, blocked the VEGF-induced increase in cyclin A and decrease in p27 kip1 expressions; 5) EHNA, contrary to RP73401, enhanced the VEGF-induced increase of cyclin A and decrease of p27 kip1. 6) EHNA and RP73401 together blocked the VEGF-induced increase in cyclin D1 and decrease in p21 waf1/cip1 expressions; 7) Inhibition of VEGF-upregulated PDE2 and PDE4 reversed the VEGF-induced alterations in cell cycle protein expression, bringing back endothelial cells to a non-proliferating status. Consequently, PDE2 and PDE4 inhibitions were able to inhibit VEGF-induced endothelial cell proliferation by restoring cell cycle key protein expression, and might thus be useful in excessive angiogenesis. Furthermore, the differences between PDE2 and PDE4 effects may suggest compartmentalized effects.
authors.affiliation: Pharmacologie ey Physico-Chimie des Interactions Cellulaires et Moléculaires, UMR CNRS 7034, Université Louis Pasteur de Strasborg, Illkirch, France.
authors.forename: Laure
authors.initials: L
authors.lastname: Favot
authors.forename: Thérèse
authors.initials: T
authors.lastname: Keravis
authors.forename: Claire
authors.initials: C
authors.lastname: Lugnier
mesh_terms: D015105:3',5'-Cyclic-AMP Phosphodiesterases / Q000378:metabolism; D002352:Carrier Proteins / Q000235:genetics; D018797:Cell Cycle Proteins / Q000235:genetics*; D049109:Cell Proliferation / Q000187:drug effects; D002478:Cells, Cultured; D000242:Cyclic AMP / Q000378:metabolism*; D054678:Cyclic Nucleotide Phosphodiesterases, Type 2; D054703:Cyclic Nucleotide Phosphodiesterases, Type 4; D019925:Cyclin A / Q000235:genetics; D019938:Cyclin D1 / Q000235:genetics; D050759:Cyclin-Dependent Kinase Inhibitor p21; D050760:Cyclin-Dependent Kinase Inhibitor p27; D004730:Endothelium, Vascular / Q000166:cytology*; D005786:Gene Expression Regulation / Q000187:drug effects; D006801:Humans; D006868:Hydrolysis; D047908:Intracellular Signaling Peptides and Proteins / Q000235:genetics; D019950:Mitogen-Activated Protein Kinase 1 / Q000235:genetics; D010727:Phosphoric Diester Hydrolases / Q000378:metabolism*; D014471:Umbilical Veins; D042461:Vascular Endothelial Growth Factor A / Q000494:pharmacology*
chemical_list: C493956:CDKN1A protein, human; C436291:CDKN1B protein, human; D002352:Carrier Proteins; D018797:Cell Cycle Proteins; D019925:Cyclin A; D050759:Cyclin-Dependent Kinase Inhibitor p21; D047908:Intracellular Signaling Peptides and Proteins; D042461:Vascular Endothelial Growth Factor A; D019938:Cyclin D1; D050760:Cyclin-Dependent Kinase Inhibitor p27; D000242:Cyclic AMP; D019950:Mitogen-Activated Protein Kinase 1; D010727:Phosphoric Diester Hydrolases; D015105:3',5'-Cyclic-AMP Phosphodiesterases; D054678:Cyclic Nucleotide Phosphodiesterases, Type 2; D054703:Cyclic Nucleotide Phosphodiesterases, Type 4; C517275:PDE2A protein, human