Oxidative stress in human aorta of patients with advanced aortoiliac occlusive disease
Rev. bras. cir. cardiovasc
;
31(6): 428-433, Nov.-Dec. 2016. tab, graf
Article
Dans Anglais
| LILACS
| ID: biblio-843447
ABSTRACT
Abstract Introduction:
Oxidative stress seems to be a role in the atherosclerosis process, but research in human beings is scarce.Objective:
To evaluate the role of oxidative stress on human aortas of patients submitted to surgical treatment for advanced aortoiliac occlusive disease.Methods:
Twenty-six patients were divided into three groups control group (n=10) formed by cadaveric organ donors; severe aortoiliac stenosis group (patients with severe aortoiliac stenosis; n=9); and total aortoiliac occlusion group (patients with chronic total aortoiliac occlusion; n=7). We evaluated the reactive oxygen species concentration, nicotinamide adenine dinucleotide phosphate-oxidase, superoxide dismutase and catalase activities as well as nitrite levels in samples of aortas harvested during aortofemoral bypass for treatment of advanced aortoiliac occlusive disease.Results:
We observed a higher level of reactive oxygen species in total aortoiliac occlusion group (48.3±9.56 pmol/mg protein) when compared to severe aortoiliac stenosis (33.5±7.4 pmol/mg protein) and control (4.91±0.8 pmol/mg protein) groups (P<0.05). Nicotinamide adenine dinucleotide phosphate oxidase activity was also higher in total aortoiliac occlusion group when compared to the control group (3.81±1.7 versus 1.05±0.31 µmol/min.mg protein; P<0.05). Furthermore, superoxide dismutase and catalase activities were significantly higher in the severe aortoiliac stenosis and total aortoiliac occlusion groups when compared to the control cases (P<0.05). Nitrite concentration was smaller in the severe aortoiliac stenosis group in comparing to the other groups.Conclusion:
Our results indicated an increase of reactive oxygen species levels and nicotinamide adenine dinucleotide phosphate-oxidase activity in human aortic samples of patients with advanced aortoiliac occlusive disease. The increase of antioxidant enzymes activities may be due to a compensative phenomenon to reactive oxygen species production mediated by nicotinamide adenine dinucleotide phosphate oxidase. This preliminary study offers us a more comprehensive knowledge about the role of oxidative stress in advanced aortoiliac occlusive disease in human beings.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Maladies de l'aorte
/
Artériopathies oblitérantes
/
Stress oxydatif
/
Artère iliaque
Type d'étude:
Étude observationnelle
Limites du sujet:
Adulte
/
Femelle
/
Humains
/
Mâle
langue:
Anglais
Texte intégral:
Rev. bras. cir. cardiovasc
Thème du journal:
Cardiologie
/
Chirurgie générale
Année:
2016
Type:
Article
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Santa Casa de Porto Alegre/BR
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