A food ingredient containing phytoecdysteroids and polyphenols from quinoa grain: technology and physiological and biochemical evaluation in vivo

Abstract

An effective technological approach to produce adaptogenic microingredients is to concentrate plant biologically active substances via sorption on various matrices. The aim was to develop and evaluate in vivo the phytoecdysteroids and flavonoids concentrate extracted from quinoa grain and sorbed on the coagulated chicken egg protein. The consecutive extraction of phytoecdysteroids and flavonoids was conducted followed by sorption on the protein. The in vivo experiment was performed during 37 days using Wistar male rats. The developed concentrate was added into the diet of experimental animals in the dose 0.59±0.02 g/100 g of diet. As a stress model we used daily 40-min immobilization and exhaustive 3-hour immobilization at the end of the experiment. Urinary catecholamines content was determined, blood corticosterone, malon dialdehyde, glutathione reductase and superoxide dismutase content was determined. Phytoecdysteroids and flavonoids were concentrated 20 and 80 times respectively compared to the initial raw materials. The concentrate consumption neutralized negative effect of immobilization stress on anxiety level of Wistar rats. The significant decrease in urinary excretion of adrenaline and noradrenaline shows the pronounced adaptogenic effect of the concentrate, whereas phytoecdysteroids and flavonoids act as prostressors activating body antioxidant protection system, what is substantiated by significantly increased blood superoxide dismutase level of experimental animals.