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Complement fixing polysaccharides from Terminalia macroptera root bark, stem bark and leaves.

Yuan-Feng Zou1, Bing-Zhao Zhang2, Hilde Barsett2

  • 1Department of Pharmaceutical Chemistry, School of Pharmacy, University of Oslo, P. O. Box 1068 Blindern, 0316 Oslo, Norway. yuanfeng.zou@farmasi.uio.no.

Molecules (Basel, Switzerland)
|June 11, 2014
PubMed
Summary
This summary is machine-generated.

Terminalia macroptera bark and leaves yield bioactive polysaccharides with complement fixation activities. Root bark extracts showed the highest activity, suggesting potential therapeutic applications.

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Area of Science:

  • Phytochemistry
  • Immunology
  • Natural Products Chemistry

Background:

  • Terminalia macroptera is a plant with potential medicinal properties.
  • Polysaccharides are known to modulate immune responses.
  • Understanding the immunomodulatory effects of plant-derived polysaccharides is crucial for drug discovery.

Purpose of the Study:

  • To extract and characterize bioactive polysaccharides from Terminalia macroptera.
  • To evaluate the complement fixation activities of these polysaccharides.
  • To identify fractions with the highest immunomodulatory potential.

Main Methods:

  • Sequential extraction of root bark, stem bark, and leaves using an accelerated solvent extractor.
  • Purification of polysaccharide fractions using anion exchange chromatography and gel filtration.
  • Characterization of polysaccharides (molecular weight, chemical composition) and assessment of complement fixation activity.

Main Results:

  • Ten bioactive polysaccharide fractions were obtained.
  • Polysaccharides were identified as pectic in nature.
  • Fractions 100WTSBH-I-I and 100WTRBH-I-I from 100°C water extracts exhibited the highest complement fixation activities.
  • Root bark yielded the most active fractions, followed by leaves and stem bark.

Conclusions:

  • Terminalia macroptera is a valuable source of bioactive polysaccharides with complement-modulating properties.
  • Specific fractions, particularly from root bark, demonstrate significant immunomodulatory potential.
  • Further research into these polysaccharides could lead to novel immunotherapeutic agents.