Nitric oxide attenuates matrix metalloproteinase-9 production by endothelial cells independent of cGMP- or NFκB-mediated mechanisms
| Autor: | Jose E. Tanus-Santos, Raquel F. Gerlach, Cesar A. Meschiari, Tatiane C. Izidoro-Toledo |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
medicine.medical_specialty
Cell type Transcription Genetic Clinical Biochemistry Gene Expression METALOPROTEINASES (PRODUÇÃO) Matrix metalloproteinase Nitric Oxide Umbilical vein Nitric oxide chemistry.chemical_compound Internal medicine Nitriles Human Umbilical Vein Endothelial Cells medicine Humans Nitric Oxide Donors Zymography Sulfones Phosphorylation Cyclic GMP Molecular Biology Cells Cultured Tissue Inhibitor of Metalloproteinase-1 Transcription Factor RelA Snap Cell Biology General Medicine Endocrinology Matrix Metalloproteinase 9 chemistry Culture Media Conditioned Phorbol Tetradecanoylphorbol Acetate Enzyme Repression Soluble guanylyl cyclase Protein Processing Post-Translational Nitroso Compounds |
| Zdroj: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| ISSN: | 1573-4919 0300-8177 |
| Popis: | Cardiovascular diseases involve critical mechanisms including impaired nitric oxide (NO) levels and abnormal matrix metalloproteinase (MMP) activity. While NO downregulates MMP expression in some cell types, no previous study has examined whether NO downregulates MMP levels in endothelial cells. We hypothesized that NO donors could attenuate MMP-9 production by human umbilical vein endothelial cells (HUVECs) as a result of less NFκB activation or cyclic GMP (cGMP)-mediated mechanisms. We studied the effects of DetaNONOate (10-400 μM) or SNAP (50-400 μM) on phorbol 12-myristate 13-acetate (PMA; 10 nM)-induced increases in MMP-9 activity (by gel zymography) or concentrations (by ELISA) as well as on a tissue inhibitor of MMPs' (TIMP)-1 concentrations (by ELISA) in the conditioned medium of HUVECs incubated for 24 h with these drugs. We also examined whether the irreversible inhibitor of soluble guanylyl cyclase ODQ modified the effects of SNAP or whether 8-bromo-cGMP (a cell-permeable analog of cGMP) influenced PMA-induced effects on MMP-9 expression. Total and phospho-NFκB p65 concentrations were measured in HUVEC lysates to assess NFκB activation. Both NO donors attenuated PMA-induced increases in MMP-9 activity and concentrations without significantly affecting TIMP-1 concentrations. This effect was not modified by ODQ, and 8-bromo-cGMP did not affect MMP-9 concentrations. While PMA increased phospho-NFκB p65 concentrations, SNAP had no influence on this effect. In conclusion, this study shows that NO donors may attenuate imbalanced MMP expression and activity in endothelial cells independent of cGMP- or NFκB-mediated mechanisms. Our results may offer an important pharmacological strategy to approach cardiovascular diseases. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink