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Istituto di scienza dell'alimentazione

Torna all'elenco Contributi in rivista anno 2012

Contributo in rivista

Tipo: Articolo in rivista

Titolo: Predominant role of obesity/insulin resistance in oxidative stress development.

Anno di pubblicazione: 2012

Formato: Cartaceo

Autori: D'Archivio M, Annuzzi G, Varė R, Filesi C, Giacco R, Scazzocchio B, Santangelo C, Giovannini C, Rivellese AA, Masella R.

Affiliazioni autori: Department of Veterinary Public Health and Food Safety, Italian National Institute of Health, Rome, Italy Department of Clinical and Experimental Medicine, Federico II University, Naples, Italy National Research Council, Institute of Food Science, Avellino, Italy

Autori CNR:

  • ROSALBA GIACCO

Lingua: inglese

Abstract: BACKGROUND: Hyperlipidaemia, hyperglycaemia and hyperinsulinaemia, hallmarks of the postprandial state, have been also associated with increased oxidative stress and lipoprotein oxidation contributing to vascular injury and atherosclerosis. However, the specific links among metabolic disorders, postprandial state, insulin resistance and oxidative stress are still to be clarified. This study aimed at investigating the individual role played by obesity, insulin resistance and type 2 diabetes in the occurrence of fasting and postprandial oxidative stress. DESIGN: Biomarkers of oxidative stress [F2-isoprostanes and circulating oxidized low-density lipoproteins (LDL)], LDL oxidability (conjugated diene kinetic, thiobarbituric acid reactive substances (TBARs) formation and electronegativity increase) and antioxidant vitamins (?-carotene, ?-tocopherol and retinol) were evaluated at fasting and 6 h after a standard fat-rich meal in 10 obese diabetic (ObD), 11 obese and 11 normal-weight control men. Insulin sensitivity was evaluated by euglycaemic hyperinsulinaemic clamp. RESULTS: ObD and obese subjects, characterized by a similar level of adiposity and insulin resistance, showed higher urinary F2-isoprostanes and circulating oxidized LDL, an increased susceptibility to oxidation of plasma LDL (lower lag phase, higher TBARs formation, and higher relative electrophoretic mobility), and lower plasma content of ?-carotene and retinol than control subjects, both at fasting and after the test meal. CONCLUSIONS: Obesity and insulin resistance, more than type 2 diabetes, play the most relevant role in oxidative stress development. The correction of obesity and insulin resistance might be a useful strategy in counteracting systemic oxidative stress.

Lingua abstract: inglese

Rivista:

European journal of clinical investigation Blackwell Scientific Publications.
Paese di pubblicazione: Regno Unito
Lingua: inglese
ISSN: 0014-2972

DOI: 10.1111/j.1365-2362.2011.02558.x

Referee: Sė: Internazionale

Indicizzato da: PubMed [21679180]

Parole chiave:

  • Insulin resistance;obesity; oxidative stress; oxLDL; type 2 diabetes

Strutture CNR:

Moduli:

Allegati: Predominant role of obesity/insulin resistance in oxidative stress development. (application/pdf)

 
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