Results (
Thai) 1:
[Copy]Copied!
Compared with young adults, older adults have significantly impaired capacities to resist oxidative damage when facedwith acute stress such as ischemia/reperfusion. This impairment likely contributes to increased morbidity and mortality inolder adults in response to acute trauma, infections, and the susceptibility to diseases such as atherosclerosis, cancer,diabetes, and Alzheimer’s disease. Consumption of foods high in polyphenols, particularly anthocyanins, have beenassociated with improved health, but the mechanisms contributing to these salutary effects remain to be fully established.This study tested the hypothesis that consumption of tart cherry juice containing high levels of anthocyanins improves thecapacity of older adults to resist oxidative damage during acute oxidative stress. In a double-blind, placebo-controlled,crossover design, 12 volunteers [6 men and 6 women; age 69 6 4 y (61–75 y)] consumed in random order either tart cherryjuice or placebo (240 mL twice daily for 14 d) separated by a 4-wk washout period. The capacity to resist oxidative damagewas measured as the changes in plasma F2-isoprostane levels in response to forearm ischemia-reperfusion (I/R) beforeand after each treatment. The tart cherry juice intervention reduced the I/R-induced F2-isoprostane response (P , 0.05),whereas placebo had no significant effect. The tart cherry juice intervention also reduced basal urinary excretion ofoxidized nucleic acids (8-hydroxy-29-deoxyguanosine, 8-hydroxyguanosine) (P , 0.05) but not urinary excretion ofisoprostanes. These data suggest that consumption of tart cherry juice improves antioxidant defenses in vivo in olderadults as shown by an increased capacity to constrain an oxidative challenge and reduced oxidative damage to nucleicacids
Being translated, please wait..
