Etude Phytochimique de Senna occidentalis (L.) Link et Cissus quadrangularis (Linn) deux Plantes Médicinales Gabonaises Utilisées Contre la Filaire Loa Loa

Abstract

Objective: This study aimed to valorize two medicinal plants used against Loa loa filarial in Gabon. Material and Methods: Powders of leaves of Senna occidentalis and stems and leaves of Cissus quadrangularis were proposal to successive extractions by solvents with increasing polarities (cyclohexan, dichloromethan, methanol and demineralized water). Qualitative Phytochemistry screening was established using the standard color and/or precipitation reactions. Results: The results reveal the predominance of total sugar, alkaloids, and phenols in all extracts. Cathechic tannins, reducing sugar, and flavonoids on many extracts were tested. Gallic tannins and coumarins are found in some extracts. They are very few quinones, triterpenes or sterols in the two species. Conclusion: Some secondary metabolites have proved filaricide activities already. The abundance of chemical compounds present in these medicinal plants would justify their usage. However, the evaluation of biological activities on the Loa loa filarial along with toxicity remains unexplored.

Activities of Organic Extracts of Cassia occidentalis Leaves on the Mortality and Fecundity of Callosobruchus maculatus (Main Insect Pest of Vigna unguiculata Seed Stocks)

“…Indeed, contact with fresh leaves and doses caused mortality of approximately 40% ( P < 0.05)on eggs and 100% in adults after 9 days, fumigation causes mortality proportional to the dose ranging from 14 to 90%. Deme et al [15] showed that Cassia alata and Cassia tora leaf powders control C. maculatus with mortality percentages ranging from 40 to 90% and 30 to 70% respectively depending on the dose applied.…”

Phytochemical study of the extracts of oilseeds of Staudtia kamerunensis var. gabonensis (Warb.) from Gabon and evaluation of their antiradical activity

“…1 mL of concentrated H 2 SO 4 (sulfuric acid) is then poured into tubes (this is the reaction of Libermann-Buchard). The appearance of a purple colour and coloring of the supernatant blue or purple green indicates the presence of sterols or triterpenes respectively as described by Nze Kamsi et al, (2020).…”

Review on the Ethnobotany, Phytochemical and Pharmacological Profile of Senna occidentalis L. (Fabaceae): Potential Application as Remedy in the Treatment of Dysmenorrhea

“…Worldwide, pharmacological studies on plant extracts, secondary metabolisms, active ingredients, or biomolecules have proven to be effective on parasite, larvae, etc. [7,8].…”

“…To make tea, in China more precisely in Fujian province, the grains of the plant consumed in infusion replace tea for people suffering from high blood pressure. Blackberries are used on helminths and are used as antipyretics [7]. 5.…”