Efectos del policosanol, el extracto de semillas de uva y su terapia combinada sobre marcadores oxidativos en ratas

the polycosanol, a mixture of superior primary aliphatic alcohols obteined from the sugarcane wax (sacharum officinarum, l.) and the grape seeds extract (vitis vinífera, l.) produces antioxidant effects experimentally and clinically demonstrated. the aim of present paper was to compare the effects of polycosanol, the grape seed extract, and its combined therapy on oxidative markers in plasma and liver of rats. the rats were distributed into 4 groups: a control one and three treated with polycosanol, grape seed extract and its combined therapy, respectively, using a 25 mg/kg dose over 4 weeks. the single-therapies significantly reduced the plasmatic concentrations of malonyldialdehyde and of proetin-associated carbonyl groups regarding the control, showing a similar efficacy. combined therapy reduced in a more effective way (p < 0,001) the malonyldialdehyde concentrations of carbonyl groups, and also decreased (p < 0,01) the concentrations of carbonyl groups, but no more than the single-therapies. each single-therapy reduced the malonyldialdehyde concentrations generated by spontaneous oxidant system in liver homogenate. the effect of combined therapy was higher (p < 0,05) than the grape seed extract, but no more than that of polycosanol. we concluded that oral single-therapies using polycosanol and grape seed extract, administered during 4 weeks, decreased in a similar way, the lipid peroxidation in plasma and liver of rats. combined therapy was more effective to inhibits the lipid peroxidation in plasma than each single-therapy, separately.