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Related Experiment Videos

Pectin isolated from white cabbage--structure and complement-fixing activity.

Bjørge Westereng1, Osman Yousif, Terje E Michaelsen

  • 1School of Pharmacy, Department of Pharmaceutical Chemistry-Pharmacognosy, University of Oslo, Blindern, Oslo, Norway. bjorge.westereng@matforsk.no

Molecular Nutrition & Food Research
|July 26, 2006
PubMed
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White cabbage contains pectin polysaccharides with immunostimulatory activity. Removing arabinose sugars from these cabbage polysaccharides significantly impacts their complement-fixing capabilities, indicating their role in immune response.

Area of Science:

  • Plant Biochemistry
  • Immunology
  • Carbohydrate Chemistry

Background:

  • Polysaccharides are known to modulate immune responses.
  • White cabbage is a common vegetable with potential bioactive compounds.

Purpose of the Study:

  • To investigate the immunostimulatory activity of polysaccharides from white cabbage.
  • To characterize the chemical structure of these active polysaccharides.

Main Methods:

  • Isolation and purification of polysaccharides from white cabbage.
  • Chemical analysis including methanolysis, (13)C-NMR, and linkage analysis.
  • Complement-fixing test to assess biological activity.

Main Results:

  • A pectin-like polysaccharide was isolated, rich in alpha-galactopyranoside (alpha-GalpA) and alpha-arabinofuranoside (alpha-Araf).

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  • Linkage analysis revealed specific structural features of the sugar residues.
  • The polysaccharide exhibited complement-fixing activity, which was reduced upon removal of alpha-Araf.

    • Conclusions:

    • White cabbage contains immunostimulatory pectin polysaccharides.
    • The arabinose side chains of these polysaccharides are crucial for their complement-fixing activity.