Increased serum nitric oxide concentration after bariatric surgery--a potential mechanism for cardiovascular benefit.
Obes Surg
; 20(2): 204-10, 2010 Feb.
Article
em En
| MEDLINE
| ID: mdl-19997784
ABSTRACT
BACKGROUND:
It is believed that endothelial dysfunction associated with obesity contributes to reduced vascular production of nitric oxide (NO). Weight reduction after bariatric surgery is known to decrease the risk of cardiovascular disease. The purpose of this study was to determine whether bariatric surgery leads to improvement of metabolic markers of endothelial function serum NO and its precursor (arginine) concentrations in obese patients.METHODS:
Serum NO and L-arginine concentrations were measured in 25 morbidly obese patients directly before and 6 months after bariatric surgery. Moreover, selected parameters that may be involved in development of endothelial dysfunction were also studied. Control group consisted of ten healthy individuals with normal body weight.RESULTS:
Six months after bariatric surgery, serum NO concentration was approximately 40% higher than before surgery. Surprisingly, serum NO concentration in nonobese controls was essentially similar to obese patients before surgery. In contrast, serum L-arginine concentration was higher in obese patients than in controls and decreased significantly after surgery. The body weight, blood pressure, triacylglycerols, LDL/HDL-cholesterol ratio, insulin, homeostasis model assessment score (HOMA-index), C-reactive protein, and white blood cell count were higher in obese patients as compared with controls and decreased significantly after surgery.CONCLUSIONS:
Our results indicate that improvement of insulin resistance, lipidemia, and blood pressure as well as reduction of systemic inflammation after bariatric surgery were associated with the increase of serum NO concentration. We propose that the increase in serum NO concentration contribute to diverse beneficial effects of weight loss after bariatric surgery especially in the context of risk of atherosclerosis.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Obesidade Mórbida
/
Endotélio Vascular
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Doenças Cardiovasculares
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Redução de Peso
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Óxido Nítrico
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Prognostic_studies
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Risk_factors_studies
Limite:
Adult
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Aged
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Female
/
Humans
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Male
/
Middle aged
Idioma:
En
Ano de publicação:
2010
Tipo de documento:
Article