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Related Experiment Video

Updated: May 16, 2026

Biosynthesis of a Flavonol from a Flavanone by Establishing a One-pot Bienzymatic Cascade
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Anticomplementary flavonoids from Galphimia glauca.

A Müller1, S Reiter, C Wirth

  • 1Institute of Pharmaceutical Biology, Ludwig Maximilians University, Munich, Germany.

Phytomedicine : International Journal of Phytotherapy and Phytopharmacology
|December 1, 2012
PubMed
Summary
This summary is machine-generated.

Polyphenolic compounds from Galphimia glauca were tested for complement inhibition. Quercetin acyl glycosides showed significant reduction of complement-induced hemolysis in classical and alternative pathways.

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Area of Science:

  • Pharmacology
  • Natural Products Chemistry
  • Immunology

Background:

  • Polyphenolic compounds are known for diverse biological activities.
  • Galphimia glauca is a plant source of various bioactive compounds.
  • The complement system plays a crucial role in innate immunity and inflammation.

Purpose of the Study:

  • To investigate the complement inhibitory potential of flavonol acyl glycosides and gallic acid derivatives from Galphimia glauca.
  • To evaluate the efficacy of these compounds in both classical and alternative complement pathways.

Main Methods:

  • Screening of selected polyphenolic compounds using classical and alternative complement assays.
  • Quantification of inhibition of complement-induced hemolysis.
  • Dose-response evaluation of active compounds.

Main Results:

  • Quercetin-3-O-(2″-galloyl)-β-D-glucoside demonstrated potent inhibition of complement-induced hemolysis, reducing it by 91.3% at 100 μM and 76.69% at 50 μM in the classical pathway.
  • Quercetin-3-O-(6″-galloyl)-β-D-glucoside also showed significant inhibition (74.3% at 50 μM) in the classical pathway.
  • Other tested compounds like isoquercitrin, hyperoside, gallic acid, and ellagic acid exhibited much lower inhibitory effects.
  • In the alternative pathway, the galloyl quercetin glycosides showed weaker inhibitory effects compared to the classical pathway.

Conclusions:

  • Specific quercetin acyl glycosides from Galphimia glauca possess significant complement inhibitory properties.
  • These compounds may serve as leads for developing novel immunomodulatory agents.
  • Further research is warranted to elucidate the precise mechanisms of action and therapeutic potential.