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Related Experiment Videos

Venusol from Gunnera perpensa: structural and activity studies.

Fatima Khan1, Xolani K Peter, Rod M Mackenzie

  • 1School of Chemical and Physical Sciences (Chemistry), University of Natal, Private Bag X01, Scottsville, 3209, Pietermaritzburg, South Africa.

Phytochemistry
|April 28, 2004
PubMed
Summary

The Gunnera perpensa extract and its major compound Z-venusol affect uterine smooth muscle contractility. The whole extract directly stimulates contractions, while Z-venusol induces sustained contractility after flushing.

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Area of Science:

  • Pharmacology
  • Phytochemistry
  • Ethnobotany

Background:

  • Gunnera perpensa is a plant with traditional medicinal uses.
  • Understanding its pharmacological properties is crucial for scientific validation.

Purpose of the Study:

  • To isolate and identify compounds from Gunnera perpensa rhizomes.
  • To investigate the effects of the extract and its constituents on isolated rat uterine smooth muscle.

Main Methods:

  • Aqueous extraction of Gunnera perpensa dry rhizomes.
  • Isolation and structural elucidation of chemical components using X-ray diffraction.
  • Pharmacological testing on isolated uterine smooth muscle from rats.

Main Results:

  • Pyrogallol, succinic acid, lactic acid, trimethyl ether of ellagic acid glucoside, and Z-venusol were isolated.

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  • Z-venusol, a phenylpropanoid glucoside, was identified as the major constituent.
  • The whole extract induced direct uterine smooth muscle contraction and continuous contractility.
  • Z-venusol induced continuous contractility but not direct contraction.

    • Conclusions:

    • Gunnera perpensa extract possesses uterotonic properties.
    • Z-venusol is a key active phenylpropanoid glucoside responsible for sustained uterine contractility.