In-vivo sub-chronic toxicological evaluation of extract of Vernonia glaberrima leaves in experimental rats

  • Divinelove E. ABU University of Nigeria Teaching Hospital, Department of Pharmacy, P.M.B. 01129, Ituku-Ozalla 400001 Enugu State; University of Nigeria Nsukka, Faculty of Pharmaceutical Sciences, Department of Pharmaceutical and Medicinal Chemistry, 410001, Enugu State (NG)
  • Jennifer N. TIM University of Nigeria Nsukka, Faculty of Pharmaceutical Sciences, Department of Pharmaceutical and Medicinal Chemistry, 410001, Enugu State (NG)
  • Precious IMO-OBASI University of Nigeria Teaching Hospital, Department of Pharmacy, P.M.B. 01129, Ituku-Ozalla 400001 Enugu State; University of Nigeria Nsukka, Faculty of Pharmaceutical Sciences, Department of Pharmaceutical and Medicinal Chemistry, 410001, Enugu State (NG)
  • Thecla O. AYOKA University of Nigeria Nsukka, Faculty of Physical Sciences, Department of Science Laboratory Technology (Biochemistry Unit), 410001, Enugu State (NG)
  • Charles O. NNADI University of Nigeria Nsukka, Faculty of Pharmaceutical Sciences, Department of Pharmaceutical and Medicinal Chemistry, 410001, Enugu State (NG) https://orcid.org/0000-0001-8749-3431
Keywords: hematology, histopathology, toxicity, Vernonia glaberrima

Abstract

The toxicological profile of a plant is an important ethnomedicinal parameter considered in drug discovery, ethno-therapeutics and safety management in vital organs. The study evaluated the 28-day repeated-dose toxicological profile of moderately polar extract of Vernonia glaberrima being investigated as a therapeutic for sleeping sickness and other parasitic infections in experimental rats. Albino rats were divided into four groups (n=10) and the fraction was administered orally once daily at doses of 0 (control), 40, 250 and 1000 mg kg-1 day-1. Food intake, body weight, organ-to-body weight, biochemical, hematological, plasma blood chemistry, serum hormone levels and histopathological examinations were evaluated on the 29th day. There was no difference in the clinical signs between the treated and untreated rats. The mean body weight of female rats treated with 250 mg kg-1 dose increased significantly (p < 0.05) on the 20th day with no difference in the food intake. All the changes in the blood chemistry, hematology and serum hormone levels cannot be considered to be of toxicological importance. A statistically significant elevation (p < 0.05) was observed in the liver-to-body weight (3.21 to 3.89 g 100g-1) of male rats and in the kidney- (0.67 to 0.98 g 100g-1) and brain-to-body (0.58 to 0.72 g 100g-1) weights of female rats in the 1000 mg kg-1 groups. The histopathological examination showed that there was no definitive association between the lesions in the liver and the treatments. The present data, in addition to folklore, has further demonstrated its safety and the need for the isolation of non-toxic bioactive constituents, especially from the dichloromethane fraction.

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Published
2022-05-30
How to Cite
ABU, D. E., TIM, J. N., IMO-OBASI, P., AYOKA, T. O., & NNADI, C. O. (2022). In-vivo sub-chronic toxicological evaluation of extract of Vernonia glaberrima leaves in experimental rats. Notulae Scientia Biologicae, 14(2), 11181. https://doi.org/10.55779/nsb14211181
Section
Research articles
CITATION
DOI: 10.55779/nsb14211181