BACKGROUND: We recently obtained evidence demonstrating that cultured bovine endothelial cells contain cytosolic proteins that form complexes with the 3'-untranslated region of endothelial nitric oxide synthase (eNOS) mRNA and are associated with its destabilization. The aim of this study was to determine the presence of such proteins and eNOS expression in hypercholesterolemic rabbits as an in vivo model of endothelial dysfunction. METHODS AND RESULTS: Endothelium-dependent relaxation to acetylcholine and the calcium ionophore A23187 was reduced in aortic segments from hypercholesterolemic rabbits compared with controls. Treatment of hypercholesterolemic rabbits with cerivastatin (0.1 mg. kg body wt(-1). d(-1)) restored endothelium-dependent relaxation. Aortic eNOS expression was reduced in hypercholesterolemic rabbits and was accompanied by enhanced binding activity of a 60-kDa cytosolic protein and reduced stability of eNOS mRNA. Cerivastatin treatment upregulated eNOS expression and reduced the interaction of the cytosolic protein with the 3'-untranslated region of eNOS mRNA. Mononuclear cells from hypercholesterolemic rabbits also showed a marked reduction of eNOS expression and eNOS mRNA stability and an increase in binding activity of the cytosolic protein, which were also prevented by cerivastatin treatment. CONCLUSIONS: These results demonstrate the presence of a 60-kDa protein that binds to eNOS mRNA and reductions in eNOS expression in both vascular wall and mononuclear cells that are prevented by cerivastatin.
BACKGROUND: We recently obtained evidence demonstrating that cultured bovine endothelial cells contain cytosolic proteins that form complexes with the 3'-untranslated region of endothelial nitric oxide synthase (eNOS) mRNA and are associated with its destabilization. The aim of this study was to determine the presence of such proteins and eNOS expression in hypercholesterolemic rabbits as an in vivo model of endothelial dysfunction. METHODS AND RESULTS: Endothelium-dependent relaxation to acetylcholine and the calcium ionophore A23187 was reduced in aortic segments from hypercholesterolemic rabbits compared with controls. Treatment of hypercholesterolemic rabbits with cerivastatin (0.1 mg. kg body wt(-1). d(-1)) restored endothelium-dependent relaxation. Aortic eNOS expression was reduced in hypercholesterolemic rabbits and was accompanied by enhanced binding activity of a 60-kDa cytosolic protein and reduced stability of eNOS mRNA. Cerivastatin treatment upregulated eNOS expression and reduced the interaction of the cytosolic protein with the 3'-untranslated region of eNOS mRNA. Mononuclear cells from hypercholesterolemic rabbits also showed a marked reduction of eNOS expression and eNOS mRNA stability and an increase in binding activity of the cytosolic protein, which were also prevented by cerivastatin treatment. CONCLUSIONS: These results demonstrate the presence of a 60-kDa protein that binds to eNOS mRNA and reductions in eNOS expression in both vascular wall and mononuclear cells that are prevented by cerivastatin.
Authors: N Durmus; A Toylu; S Evcim; B C Soner; O Demir; E Kahraman; T Demir; B Irer; S Gidener; N Atabey; A Esen Journal: Int J Impot Res Date: 2017-03-16 Impact factor: 2.896
Authors: Sonia M Najjar; Kelly J Ledford; Simon L Abdallah; Alexander Paus; Lucia Russo; Meenakshi K Kaw; Sadeesh K Ramakrishnan; Harrison T Muturi; Christian K Raphael; Sumona Ghosh Lester; Garrett Heinrich; Sandrine V Pierre; Ralf Benndorf; Veronika Kleff; Ayad A Jaffa; Emile Lévy; Guillermo Vazquez; Ira J Goldberg; Nicole Beauchemin; Rosario Scalia; Süleyman Ergün Journal: Am J Physiol Endocrinol Metab Date: 2013-06-25 Impact factor: 4.310
Authors: Doyon Won; Su-Ning Zhu; Mian Chen; Anouk-Martine Teichert; Jason E Fish; Charles C Matouk; Michael Bonert; Matadial Ojha; Philip A Marsden; Myron I Cybulsky Journal: Am J Pathol Date: 2007-11 Impact factor: 4.307