Oxidative stress and metabolic syndrome in a Japanese female population

Aim: One of the methods to evaluate oxidative stress in clinical medical settings is the reactive oxygen metabolites (d‐ROMs) test. While metabolic syndrome (MetS) is considered an oxidative condition, the oxidative status in MetS has not been fully examined using this test. The aim of the present study was to investigate the possible association between oxidative stress as evaluated by the d‐ROMs test and the MetS component number, in a Japanese female population. Methods: The serum oxidant capacity (measured by the d‐ROMs test) was cross‐sectionally determined in cardiovascular disease‐free and non‐smoking women who were not taking medications (n= 180; mean age, 60 ± 10 (standard deviation) years). Their MetS state was determined by the National Cholesterol Education Program Adult Treatment Panel recommendations with minor modifications for a Japanese population. Results: Patients with MetS (n= 60, 362 ± 53 CARR U) showed a significantly higher oxidant capacity by d‐ROMs than those without MetS (n= 120, 324 ± 55 CARR U, P < 0.01). Moreover, the significant increase in the oxidant capacity by d‐ROMs was closely associated with an increase in the MetS component number (trend P < 0.01). Conclusions: These results showed a significantly positive association between the oxidant capacity (by d‐ROMs) and the MetS component number in this population. Further studies are required to establish the clinical applications of this test to MetS practice and clarify the biological mechanisms of the observed relationships.