Synergism between Soluble and Dietary Fiber Bound Antioxidants

ÇELİK E. E., GÖKMEN V., Skibsted L. H.

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, vol.63, no.8, pp.2338-2343, 2015 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 63 Issue: 8
  • Publication Date: 2015
  • Doi Number: 10.1021/acs.jafc.5b00009
  • Journal Name: JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2338-2343
  • Keywords: synergism, free antioxidants, bound antioxidants, dietary fibers, cereal grains, WHOLE-GRAIN INTAKE, LIPID-PEROXIDATION, PHOTOSENSITIZED PEROXIDATION, COUMARIN DERIVATIVES, CEREAL FIBER, DISEASE, BRAN, METAANALYSIS, CONSUMPTION, WOMEN
  • Hacettepe University Affiliated: Yes

Abstract

This study investigates the synergism between antioxidants bound to dietary fibers (DF) of grains and soluble antioxidants of highly consumed beverages or their pure antioxidants. The interaction between insoluble fractions of grains containing bound antioxidants and soluble antioxidants was investigated using (i) a liposome-based system by measuring the lag phase before the onset of oxidation and (ii) an ESR-based system by measuring the reduction percentage of Fremys salt radical. In both procedures, antioxidant capacities of DF-bound and soluble antioxidants were measured as well as their combinations, which were prepared at different ratios. The simple addition effects of DF-bound and soluble antioxidants were compared with measured values. The results revealed a clear synergism for almost all combinations in both liposome- and ESR-based systems. The synergism observed in DF-boundsoluble antioxidant system paints a promising picture considering the role of fiber in human gastrointestinal (GI) tract health.