In vitro antitrypanosomal effects of Methanol Leaf Extract of Lasimopha senegalensis on Trypanosomiasis brucei brucei
Abstract
The qualitative and quantitative constituents of methanol extract of aerial part (leaves and petioles) of Lasimorpha senegalensis (LS), and its’ in vitro effect on Trypanosoma brucei (T. b.) were investigated using standard scientific methods. Various graded doses of the extracts were reconstituted and used. These doses are 0.005 mg/ml, 0.008 mg/ ml, 0.0195 mg/ ml, 0.039 mg/ ml, 0.039 mg/ ml, 0.078 mg/ ml, 0.0156 mg/ ml, 0.0313 mg/ ml, 0.625 mg/g, 1.25 mg/ml, 2.5 mg/ml, 5.0 mg/ml and 10.0 mg/ml respectively. These doses were added to 0.02 ml of blood containing 109 of T. b. brucei in each test tube, using a pippete. The mixture was then monitored under × 400 Microscopic magnification for 60 minutes to observe for motility of the T. b. parasites. Results from qualitative analysis showed that methanol aerial part extracts of LS contained pharmacologically active phytochemicals, such as alkaloids, flavonoids, steroids, cardiac glycosides, protein, carbohydrates, saponins, phenols, tannins and glycosides. On the other hand, the quantitative phytochemical analysis showed high amounts of alkaloids, (1391.70 mg/g), flavonoids (5393.23 mg/g), carbohydrates (5329.86 mg/g), steroids (1499.26 mg/g), protein (1741.0 mg/g), resin (968.55 mg/g) and terpenoids (3802.53 mg/g). It was also observed that saponins, phenols and tannins were in moderate quantities of 109.70 mg/g, 359.12 mg/g and 344.93 mg/g, respectively. However, other phytochemicals of pharmacological importance that were not tested qualitatively, were quantified and these include; anthracyanin (108.90 mg/g), carotenoids (84.31 mg/g), chlorophyll (299.80 mg/g) and cyacogenic glycosides (410.10 mg/g). The study provided insights into the potentials of methanol aerial part extract of LS to contain bioactive phytochemicals that possess both anti-inflammatory and antioxidants activities, and these activities are important in reducing stress associated with Trypanosoma infections in animals, as evidenced by potentiation of the antitrypanosomal drug (diminazen aceturate).
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