Journal of the Serbian Chemical Society 2013 Volume 78, Issue 3, Pages: 429-443
https://doi.org/10.2298/JSC121213020K
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Biological activity of Aronia melanocarpa antioxidants pre-screening in intervention study design
Konić-Ristić Aleksandra (Centre of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, Belgrade)
Srdić-Rajić Tatjana (Institute of Oncology and Radiology, Belgrade)
Kardum Nevena (Centre of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, Belgrade)
Glibetić Marija (Centre of Research Excellence in Nutrition and Metabolism, Institute for Medical Research, Belgrade)
Beneficial effects of black chokeberry fruits and juices in health promotion
and prevention of chronic diseases shown both in epidemiological and dietary
intervention studies are often connected with their antioxidant activity. The
aim of this study was to investigate the total phenolics and anthocyanins
content, chemical antioxidant activity (DPPH-assay), antioxidant protection
in erythrocytes and anti-platelet activity in vitro of three different
chokeberry products: commercial and fresh pure chokeberry juice and crude
lyophilized water-ethanol extract of chokeberry fruits, as a part of their
pre-clinical evaluation. Obtained results indicated the differences in
chemical composition and antioxidant activity of investigated products.
Cellular effects, including both in vitro anti-platelet and antioxidant
effects, were not directly correlated with the chemical antioxidant activity
and results obtained in vitro for anti-platelet effects just partially
consistent with the results obtained in vivo, in a pilot intervention trial.
In conclusion, chemical analyses and in vitro experiments on foods and their
bioactives are a valuable pre-screening tool for the evaluation of their
biological activity. However, extrapolation of the obtained results to the in
vivo settings is often limited and influenced by the bioavailability and
metabolism of native dietary compounds or interactions with different
molecules within the human body.
Keywords: chokeberry, erythrocytes, platelets, DPPH assay, flow cytometry
Projekat Ministarstva nauke Republike
Srbije, br. III41030