In silico and in vivo anti-malarial studies of 18β glycyrrhetinic acid from Glycyrrhiza glabra

PLoS One. 2013 Sep 24;8(9):e74761. doi: 10.1371/journal.pone.0074761. eCollection 2013.

Abstract

Malaria is one of the most prevailing fatal diseases causing between 1.2 and 2.7 million deaths all over the world each year. Further, development of resistance against the frontline anti-malarial drugs has created an alarming situation, which requires intensive drug discovery to develop new, more effective, affordable and accessible anti-malarial agents possessing novel modes of action. Over the past few years triterpenoids from higher plants have shown a wide range of anti-malarial activities. As a part of our drug discovery program for anti-malarial agents from Indian medicinal plants, roots of Glycyrrhizaglabra were chemically investigated, which resulted in the isolation and characterization of 18β-glycyrrhetinic acid (GA) as a major constituent. The in vitro studies against P. falciparum showed significant (IC50 1.69 µg/ml) anti-malarial potential for GA. Similarly, the molecular docking studies showed adequate docking (LibDock) score of 71.18 for GA and 131.15 for standard anti-malarial drug chloroquine. Further, in silico pharmacokinetic and drug-likeness studies showed that GA possesses drug-like properties. Finally, in vivo evaluation showed a dose dependent anti-malarial activity ranging from 68-100% at doses of 62.5-250 mg/kg on day 8. To the best of our knowledge this is the first ever report on the anti-malarial potential of GA. Further work on optimization of the anti-malarial lead is under progress.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Antimalarials / pharmacology*
  • Antimalarials / therapeutic use
  • Biological Availability
  • Computer Simulation*
  • Glycyrrhetinic Acid / analogs & derivatives*
  • Glycyrrhetinic Acid / chemistry
  • Glycyrrhetinic Acid / isolation & purification
  • Glycyrrhetinic Acid / pharmacology
  • Glycyrrhetinic Acid / therapeutic use
  • Glycyrrhiza / chemistry*
  • L-Lactate Dehydrogenase / chemistry
  • Malaria, Falciparum / drug therapy
  • Mice
  • Models, Molecular
  • Plant Roots / chemistry
  • Plasmodium falciparum / drug effects
  • Plasmodium falciparum / enzymology

Substances

  • Antimalarials
  • 18alpha-glycyrrhetinic acid
  • L-Lactate Dehydrogenase
  • Glycyrrhetinic Acid

Grants and funding

The funding source is CSIR-network project BSC-0121 and the funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.