http://www.cnr.it/ontology/cnr/individuo/prodotto/ID23883
Homocysteine induces VCAM-1 gene expression through NF-kB and NAD(P)H oxidase activation: protective role of Mediterranean diet polyphenolic antioxidants (Articolo in rivista)
- Type
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- Homocysteine induces VCAM-1 gene expression through NF-kB and NAD(P)H oxidase activation: protective role of Mediterranean diet polyphenolic antioxidants (Articolo in rivista) (literal)
- Anno
- 2007-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1152/ajpheart.00432.2007 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Carluccio M. A.; Ancora M. A.; Massaro M.; Carluccio M.; Scoditti E.; Distante A.; Storelli C.; De Caterina R. (literal)
- Pagina inizio
- Pagina fine
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
- http://ajpheart.physiology.org/content/293/4/H2344.long (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
- Rivista
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#note
- In: American Journal of Physiology-Heart and Circulatory Physiology, vol. 293 pp. H2344 - H2354. American Physiological Society, 2007. (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Consiglio Nazionale delle Ricerca Institute of Clinical Physiology
Department of Biology, University of Lecce, Lecce;
Institute of Cardiology, \"G. d'Annunzio\" University, Chieti, Italy (literal)
- Titolo
- Homocysteine induces VCAM-1 gene expression through NF-kB and NAD(P)H oxidase activation: protective role of Mediterranean diet polyphenolic antioxidants (literal)
- Abstract
- Hyperhomocysteinemia is a recognized risk factor for vascular disease, but pathogenetic mechanisms involved in its vascular actions are largely unknown. Because VCAM-1 expression is crucial in monocyte adhesion and early atherogenesis, we evaluated the NF-kB-related induction of VCAM-1 by homocysteine (Hcy) and the possible inhibitory effect of dietary polyphenolic antioxidants, such as trans-resveratrol(RSV) and hydroxytyrosol (HT), which are known inhibitors of NF-kB-mediated VCAM-1 induction. In human umbilical vein endothelial cells (HUVEC), Hcy, at 100 micromol/l, but not cysteine, induced VCAM-1 expression at the protein and mRNA levels, as shown by enzyme immunoassay and Northern analysis, respectively. Transfection studies with deletional VCAM-1 promoter constructs demonstrated that the two tandem NF-kB motifs in the VCAM-1 promoter are necessary for Hcy-induced VCAM-1 gene expression. Hcy-induced NF-kB activation was confirmed by EMSA, as shown by the nuclear translocation of its p65 (RelA) subunit and the degradation of the inhibitors IkB-alfa and IkB-beta by Western analysis. Hcy also increased intracellular reactive oxygen species by NAD(P)H oxidase activation, as shown by the membrane translocation of its p47phox subunit. NF-kB inhibitors decreased Hcy-induced intracellular reactive oxygen species and VCAM-1 expression. Finally, we found that nutritionally relevant concentrations of RSV and HT, but not folate and vitamin B6, reduce (by 60% at 10-6 mol/l) Hcy-induced VCAM-1 expression and monocytoid cell adhesion to the endothelium. These data indicate that pathophysiologically relevant Hcy concentrations induce VCAM-1 expression through a prooxidant mechanism involving NF-kB. Natural Mediterranean diet antioxidants can inhibit such activation, suggesting their possible therapeutic role in Hcy-induced vascular damage. (literal)
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