Antioxidant capacity of broccoli sprouts subjected to gastrointestinal digestion

J Sci Food Agric. 2015 Jul;95(9):1892-902. doi: 10.1002/jsfa.6895. Epub 2014 Oct 6.

Abstract

Background: Broccoli is a common vegetable recognized as a rich source of antioxidants. To date, research on the antioxidant properties of broccoli, predominantly conducted on extracts, has not considered the lesions of composition and this activity after gastrointestinal digestion. Here the stability of antioxidants during gastrointestinal digestion was evaluated in conjunction with the protective effects of broccoli sprouts (BS) against oxidative stress in human colon cells.

Results: The obtained data suggest that, among the biocompounds identified in BS, glucosinolates were mainly degraded under gastrointestinal digestion, while phenolics, particularly hydroxycinnamic acid derivatives, were the most resistant constituents. The antioxidant capacity of BS extract subjected to gastrointestinal digestion was similar to or higher than that determined for non-digested BS. Gastrointestinal digested BS extract exhibited reactive oxygen species (ROS)-inhibitory capacity in NCM460 human colon cells, with 1 mg mL(-1) showing an ROS clearance of 76.59%. A 57.33% reduction in oxidative DNA damage in NCM460 cells due to treatment with digested BS extract was observed.

Conclusion: The results lend support to the possible application of BS as a rich source of antioxidants to improve the defensive system against oxidative stress in the human colon mucosa.

Keywords: antioxidant capacity; broccoli sprouts; colon mucosa; gastrointestinal digestion.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Antioxidants / adverse effects
  • Antioxidants / analysis*
  • Antioxidants / isolation & purification
  • Antioxidants / metabolism
  • Brassica / chemistry*
  • Brassica / economics
  • Brassica / growth & development
  • Cell Line
  • Cell Survival
  • Chemical Phenomena
  • Colon / metabolism*
  • Coumaric Acids / adverse effects
  • Coumaric Acids / analysis
  • Coumaric Acids / metabolism
  • DNA Damage
  • Dietary Supplements / adverse effects
  • Dietary Supplements / analysis
  • Digestion*
  • Freeze Drying
  • Gastrointestinal Agents / adverse effects
  • Gastrointestinal Agents / analysis
  • Gastrointestinal Agents / isolation & purification
  • Gastrointestinal Agents / metabolism
  • Glucosinolates / adverse effects
  • Glucosinolates / analysis
  • Glucosinolates / metabolism
  • Humans
  • Intestinal Mucosa / metabolism*
  • Models, Biological*
  • Oxidative Stress
  • Plant Extracts / adverse effects
  • Plant Extracts / chemistry
  • Plant Extracts / isolation & purification
  • Plant Extracts / metabolism
  • Reactive Oxygen Species / antagonists & inhibitors
  • Reactive Oxygen Species / metabolism
  • Seedlings / chemistry*
  • Seedlings / growth & development

Substances

  • Antioxidants
  • Coumaric Acids
  • Gastrointestinal Agents
  • Glucosinolates
  • Plant Extracts
  • Reactive Oxygen Species