27Mar 2017

PHYTOCHEMICAL SCREENING, ACUTE TOXICITY AND CARDIOVASCULAR EFFECTS OF WATER EXTRACT OF HALLEA LEDERMANNII (K. KRAUSE) VERDC (RUBIACEAE), MEDICINAL PLANT FROM GABON.

  • Laboratory of Naturel Substances and Organometallic Synthesis, University of Sciences and Technology of Masuku, BP 943, Franceville-Gabon.
  • Chemistry Unit of Plant and Life, Faculty of Science and Technology, University Marien Ngouabi, BP 69, Brazzaville-Congo.
  • Abstract
  • Keywords
  • References
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  • Corresponding Author

Hallea ledermannii is a medicinal plant commonly used in traditional Gabonese medicine to fight against high blood pressure. The objective of this study was to determine the chemical profile and evaluate the acute toxicity and effect of the aqueous extract of Hallea ledermannii on cardiovascular parameters in normotensive rats. Phytochemical screening was carried out by using the usual methods of Bouquet. Acute oral toxicity was evaluated in mice at doses of 50, 300, 2000 and 5000 mg / kg in accordance with OECD Guideline 423. Tests on blood pressure and heart rate were realized by the invasive method in normotensive rats anesthetized at urethane 15%. The results show that Hallea ledermannii contains many secondary metabolites. Its polar extracts have of the low contents in total phenol (3.55675 ? 0.083, 3.27425 ? 0.101, 2.78675 ? 0.110 mg GAE/g of drugs) and total flavonoids (1.2272 ? 0.197; 0.7232 ? 0.187; 0.8072 ? 0.129 mg QE/g of drugs). Aqueous extract of Hallea ledermannii is not toxic up to the 5000 mg/kg dose. This extract (10, 20 and 30 mg/kg) causes a low in systolic blood pressure and heart rate. These results suggest that the aqueous extract of Hallea ledermannii can be used orally up to the 5000 mg / kg dose without risk of toxicity and has chronotropic negative and hypotensive effects that could explain its use in traditional Gabonese medicine against high blood pressure.


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[Mba Akue Rony, Bikanga Raphael, Etou Ossibi Arnaud Wilfrid, Nkounkou Loumpangou Celestine and Ouamba Jean-Maurille. (2017); PHYTOCHEMICAL SCREENING, ACUTE TOXICITY AND CARDIOVASCULAR EFFECTS OF WATER EXTRACT OF HALLEA LEDERMANNII (K. KRAUSE) VERDC (RUBIACEAE), MEDICINAL PLANT FROM GABON. Int. J. of Adv. Res. 5 (Mar). 1055-1063] (ISSN 2320-5407). www.journalijar.com


MBA AKUE Rony
1. Laboratory of Naturel Substances and Organometallic Synthesis, University of Sciences and Technology of Masuku, BP 943, Franceville-Gabon

DOI:


Article DOI: 10.21474/IJAR01/3605      
DOI URL: https://dx.doi.org/10.21474/IJAR01/3605