title: Poly(ADP-ribose)polymerase inhibition decreases angiogenesis.
abstract: Inhibitors of poly(ADP-ribose)polymerase (PARP), a nuclear enzyme involved in regulating cell death and cellular responses to DNA repair, show considerable promise in the treatment of cancer both in monotherapy as well as in combination with chemotherapeutic agents and radiation. We have recently demonstrated that PARP inhibition with 3-aminobenzamide or PJ-34 reduced vascular endothelial growth factor (VEGF)-induced proliferation, migration, and tube formation of human umbilical vein endothelial cells (HUVECs) in vitro. Here, we show dose-dependent reduction of VEGF- and basic fibroblast growth factor (bFGF)-induced proliferation, migration, and tube formation of HUVECs in vitro by two potent PARP inhibitors 5-aminoisoquinolinone-hydrochloride (5-AIQ) and 1,5-isoquinolinediol (IQD). Moreover, PARP inhibitors prevented the sprouting of rat aortic ring explants in an ex vivo assay of angiogenesis. These results establish the novel concept that PARP inhibitors have antiangiogenic effects, which may have tremendous clinical implications for the treatment of various cancers, tumor metastases, and certain retinopathies.
authors.affiliation: Laboratory of Physiological Studies, NIAAA, National Institutes of Health, Bethesda, MD, USA.
authors.forename: Mohanraj
authors.initials: M
authors.lastname: Rajesh
authors.forename: Partha
authors.initials: P
authors.lastname: Mukhopadhyay
authors.forename: Grzegorz
authors.initials: G
authors.lastname: Godlewski
authors.forename: Sándor
authors.initials: S
authors.lastname: Bátkai
authors.forename: György
authors.initials: G
authors.lastname: Haskó
authors.forename: Lucas
authors.initials: L
authors.lastname: Liaudet
authors.forename: Pál
authors.initials: P
authors.lastname: Pacher
mesh_terms: D002465:Cell Movement / Q000187:drug effects; D049109:Cell Proliferation / Q000187:drug effects; D002477:Cells; D002478:Cells, Cultured; D004305:Dose-Response Relationship, Drug; D042783:Endothelial Cells / Q000187:drug effects / Q000502:physiology*; D006801:Humans; D007546:Isoquinolines / Q000008:administration & dosage*; D018919:Neovascularization, Physiologic / Q000187:drug effects / Q000502:physiology*; D000067856:Poly(ADP-ribose) Polymerase Inhibitors; D011804:Quinolines / Q000008:administration & dosage
chemical_list: C411425:5-aminoisoquinolinone; D007546:Isoquinolines; D000067856:Poly(ADP-ribose) Polymerase Inhibitors; D011804:Quinolines; C095653:1,5-dihydroxyisoquinoline