Studies on Phytoconstituents and In-vitro Anti-Sickling and Polymerisation Inhibition Potentials of Chloroform, Ethyl Acetate and n-Butanol Partitioned Portions of the Crude Methanol Leaf Extract of Terminalia catappa Linn.
Abstract
The results revealed that the partitioned portions of the crude methanol leaf extracts of Terminalia catappa revealed the presence of terpenoids and cardiac glycosides in the chloroform partitioned portion, tannins, cardiac glycoside, flavonoids, terpenoids and saponins in ethylacetate and n-butanol partitioned portions respectively. All the partitioned portions are devoid of alkaloids and phlabotannins. The results of the sickling reversal and inhibition potentials of the partitioned portions of Terminalia catappa methanol leaf extract revealed that the two partitioned portions of ethyl-acetate and n-butanol have effectively inhibited and reversed sickled red blood cells. The ethyl-acetate partitioned portion treatment groups provided significant protection and acted in dose dependent manner. Thus, reducing the percentage sickled cells to 18.61% at 12.5 mg/ml and 9.55% at 25 mg/ml corresponding to 63.73% and 81.39% percentage inhibition. Likewise, the n-butanol partitioned portion provided the most significant inhibitory activity with percentage sickling values of 3.29% and 2.24% corresponding to percentage inhibition values of 93.59% at 12.5 mg/ml and 95.63% 25 mg/ml respectively. Similarly, for the sickling reversal the ethylacetate partitioned portions acted in non-dose dependent manner with percentage sickling of 16.85 and 20.06% corresponding to 59.25% and 51.49% reversals respectively. However, the n-butanol partitioned portions revealed at 6.76% and 2.40% sickling after treatment. Thus, corresponding to 83.65% and 94.20% reversals at 12.5 mg/ml and 25 mg/ml concentrations. The results of the polymerization inhibition potentials of the partitioned portions revealed that the ethyl acetate and n-butanol partitioned portions of T. catappa leaf extracts were very potent anti-sickling agents capable of inhibiting gelation to a very high levels, with ethyl acetate portion having the relative percentage of inhibitions of 98.17% at 12 mg/ml and 92.65% at 25 mg/ml. While, n-butanol have inhibitory values of 98.97 at 12 mg/ml and 96.79 at 25 mg/ml.
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