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Activation of the mitogen activated protein kinase extracellular signal-regulated kinase 1 and 2 by the nitric oxide-cGMP-cGMP-dependent protein kinase axis regulates the expression of matrix metalloproteinase 13 in vascular endothelial cells



Activation of the mitogen activated protein kinase extracellular signal-regulated kinase 1 and 2 by the nitric oxide-cGMP-cGMP-dependent protein kinase axis regulates the expression of matrix metalloproteinase 13 in vascular endothelial cells



Molecular Pharmacology 62(4): 927-935



Matrix metalloproteinases (MMPs) are synthesized in response to diverse stimuli, including cytokines, growth factors, hormones, and oxidative stress. Here we show that the nitric oxide (NO) donor 2-(N,N-diethylamino)-diazenolate-2-oxide (DEA-NO) and NO from murine macrophages transcriptionally regulate MMP-13 expression in vascular endothelial cells (BAEC). The cGMP analog, 8-bromo-cGMP (8-Br-cGMP) mimicked the effect of NO, whereas incubation with the guanylate cyclase inhibitor 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one, or the cGMP-dependent protein kinase (PKG) inhibitor phenyl-1,N (2)- etheno-8-bromoguanosine-3',5'-cyclic monophosphorothioate, Rp-isomer (PET) reduced the stimulatory effect of DEA-NO on the activation of the MMP-13 promoter. Overexpression of the catalytic subunit of PKG1-alpha resulted in a 5- to 6-fold increase of the MMP-13 regulatory region over control cells. On the other hand, incubation with the mitogen-activated protein/extracellular signal-regulated kinase inhibitor 2'-amino-3'-methoxyflavone (PD98059) significantly reduced DEA-NO and 8-Br-cGMP promoter activation and mRNA expression of MMP-13 in transfected BAEC. Moreover, a complex between PKG1-alpha and the G-protein Raf-1, an upstream activator of the extracellular signal-regulated kinase signaling pathway, was detected in cells overexpressing PKG1-alpha or treated either with DEA-NO or 8-Br-cGMP. Thus, we propose that the NO-cGMP-PKG pathway enhances MMP-13 expression by the activation of ERK 1,2. This effect of NO may be important in the context of pathophysiological conditions such as inflammation or atherogenesis [corrected].

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Accession: 010122092

Download citation: RISBibTeXText

PMID: 12237340

DOI: 10.1124/mol.62.4.927


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