Protective effects of novel metal-nonoates on the cellular components of the vascular system
| Autor: | Martina Monti, Luca Pasotti, Riccardo Roggeri, Raffaella Solito, Lucia Morbidelli, Luca Puccetti, Luigi Casella, Enrico Monzani |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Male
Vascular smooth muscle Cardiotonic Agents Smooth muscle cell migration Endothelium Aorta Thoracic Pharmacology Muscle Smooth Vascular Nitric oxide Rats Sprague-Dawley chemistry.chemical_compound Organ Culture Techniques medicine Human Umbilical Vein Endothelial Cells Animals Humans Platelet Nitric Oxide Donors Cell Proliferation CD40 biology Dose-Response Relationship Drug Cell growth Rats Nitric oxide synthase Vasodilation medicine.anatomical_structure chemistry Immunology biology.protein Molecular Medicine Endothelium Vascular |
| Popis: | At the cardiovascular level, nitric oxide (NO) controls smooth muscle functions, maintains vascular integrity, and exerts an antihypertensive effect. Metal-nonoates are a recently discovered class of NO donors, with NO release modulated through the complexation of the N-aminoethylpiperazine N-diazeniumdiolate ligand to metal ions, and thus representing a significant innovation with respect to the drugs traditionally used. In this study, we characterized the vascular protective effects of the most effective compound of this class, Ni(PipNONO)Cl, compared with the commercial N-diazeniumdiolate group derivate, diethylenetriamine/nitric oxide (DETA/NO). Ni(PipNONO)Cl induced a concentration-dependent relaxation of precontracted rat aortic rings. The ED50 was 0.67 µM, compared with 4.3 µM obtained with DETA/NO. When tested on cultured microvascular endothelial cells, Ni(PipNONO)Cl exerted a protective effect on the endothelium, promoting cell proliferation and survival in the picomolar range. The administration of Ni(PipNONO)Cl to vascular smooth muscle cells reduced the cell number, promoting their apoptosis at a high concentration (10 µM). Inhibition of smooth muscle cell migration, a hallmark of atherosclerosis, was accompanied by cytoskeletal rearrangement and loss of lamellipodia. When added to isolated platelets, Ni(PipNONO)Cl significantly reduced ADP-induced aggregation. Since atherosclerosis is accompanied by an inflammatory environment, cultured endothelial cells were exposed to interleukin (IL)-1β. In the presence of IL-1β, Ni(PipNONO)Cl inhibited cyclooxygenase-2 and inducible nitric oxide synthase upregulation, and reduced endothelial permeability and the platelet and monocyte adhesion markers CD31 and CD40 at the plasma membrane. Overall, these data indicate that Ni(PipNONO)Cl exerts vascular protective effects relevant for vascular dysfunction and prevention of atherosclerosis and thrombosis. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|