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Related Experiment Videos

Enzyme inhibiting lignans from Vitex negundo.

Azhar-Ul-Haq1, Abdul Malik, Itrat Anis

  • 1International Centre for Chemical Sciences, H.E.J. Research Institute of Chemistry, University of Karachi, Karachi-75270, Pakistan.

Chemical & Pharmaceutical Bulletin
|November 3, 2004
PubMed
Summary

Two novel lignans, negundins A and B, were discovered. Compound 2 potently inhibits lipoxygenase, while compound 5 moderately inhibits butyryl-cholinesterase, indicating potential therapeutic applications.

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Area of Science:

  • Natural Product Chemistry
  • Medicinal Chemistry
  • Pharmacology

Background:

  • Lignans are a diverse class of phenolic compounds found in plants, known for various biological activities.
  • Investigating plant secondary metabolites can lead to the discovery of novel therapeutic agents.

Purpose of the Study:

  • To isolate and characterize new lignan compounds from a specific plant species.
  • To evaluate the biological activities of the isolated compounds, focusing on enzyme inhibition.

Main Methods:

  • Isolation of lignans using chromatographic techniques.
  • Structure elucidation of new compounds via comprehensive spectral analysis (NMR, MS).
  • In vitro enzyme inhibition assays for lipoxygenase and butyryl-cholinesterase.

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Main Results:

  • Two new lignans, negundins A (1) and B (2), were successfully isolated and structurally characterized.
  • Compounds (+)-diasyringaresinol (3), (+)-lyoniresinol (4), vitrofolal E (5), and vitrofolal F (6) were also identified.
  • Compound 2 demonstrated potent inhibitory activity against the lipoxygenase enzyme.
  • Compound 5 exhibited moderate inhibitory activity against butyryl-cholinesterase.

Conclusions:

  • The study successfully identified and characterized two new lignans, contributing to the knowledge of plant-derived compounds.
  • The isolated lignans, particularly negundin B and vitrofolal E, show promising enzyme inhibitory activities, suggesting potential for drug development.