Phytochemical composition, in vitro antioxidant activity and acute toxicity of Irvingia gabonensis (O’Rorke) baill ethanolic leaf extract

  • Authors

    • Efosa Ewere University of Uyo, Uyo, Akwa Ibom State, Nigeria.
    • Emmanuel Uka University of Uyo, Uyo, Akwa Ibom State, Nigeria
    • Usunomena Usunobun Benson Idahosa University, Benin City, Edo State, Nigeria.
    2016-03-24
    https://doi.org/10.14419/ijbr.v4i1.5939
  • 1, 1-Diphenyl-2-Picrylhydrazyl (DPPH), Oxidative Stress, Antioxidants, Free Radicals, Irvingia gabonensis (O’Rorke) Baill.
  • Abstract

    This study was aimed at determining the phytochemical composition, antioxidant effect and acute toxicity of Irvingia gabonensis (O’Rorke) baill (IG) ethanolic leaf extract. Qualitative phytochemcal analysis was carried out on the ethanolic leaf extract using standard procedures. Different concentrations of the plant extract (20 µg/ml- 100µg/ml) were used to assess its effect on 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical activity, It's reducing power and it total phenolic content. Lorke’s method of acute toxicity was adopted for the acute toxicity study. Results obtained showed the presence of saponins, tannins, flavonoids, cardiac glycosides, steroids, and carbohydrates in the leaf extract. The ethanolic leaf extract of IG significantly (P< 0.05) inhibited the activity of DPPH when compared with the vitamin C standard. IG leaf extract also showed a higher reducing power as compared with the Vitamin C standard. The total phenolic content of IG ethanolic leaf extract was however, significantly (P<0.05) lower than that of gallic acid, the standard used. Futhermore, the LD50 of the ethanolic leaf extract was found to be above 5000mg/kg body weight. Irvingia gabonensis (O’Rorke) baill ethanolic leaf extract is a rich source of important phytochemicals and possesses a high antioxidant activity. Also, the administration of the ethanolic leaf extract in wistar rats is safe up to a dose of 5000mg/kg body weight.

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  • How to Cite

    Ewere, E., Uka, E., & Usunobun, U. (2016). Phytochemical composition, in vitro antioxidant activity and acute toxicity of Irvingia gabonensis (O’Rorke) baill ethanolic leaf extract. International Journal of Biological Research, 4(1), 36-41. https://doi.org/10.14419/ijbr.v4i1.5939

    Received date: 2016-02-24

    Accepted date: 2016-03-20

    Published date: 2016-03-24