In vitro Activity of Ozoroa pulcherrima Schweinf. Extracts and Fractions on Schistosoma mansoni Cercariae and Adult Worms

Main Article Content

Nestor Gipwe Feussom
Hermine Boukeng Jatsa
Mérimé Christian Kenfack
Emilienne Tienga Nkondo
Ulrich Membe Femoe
Joseph Bertin Kadji Fassi
Christelle Dongmo Tsague
Etienne Dongo
Paul Désiré Djomeni Dzeufiet
Louis-Albert Tchuem Tchuente

Abstract

Aims: Continuous attempts are being made to develop new and more effective drugs for the treatment of schistosomiasis. Ozoroa pulcherrima Schweinf. is a medicinal plant used in Africa for the treatment of dysmenorrhea, lower abdominal pain, dystocia and intestinal helminthiasis. This study provides findings on the cercaricidal and schistosomicidal activity of extracts and fractions of Ozoroa pulcherrima in in vitro assays.

Methodology: The aqueous and methanolic extracts from Ozoroa pulcherrima root parts (62.5 – 2000 µg/mL), as well as the methanol derived fractions (n-hexane and ethyl acetate: 31.25 – 1000 µg/mL) were tested on cercariae and adult worms of Schistosoma mansoni. Niclosamide-olamine 5% (1 µg/mL) and praziquantel (10 µg/mL) were respectively used as reference drugs. During the assays, the mortality of cercariae after 2 hours, and adult worms’ mobility and mortality after 48 hours of incubation were evaluated.

Results: Ozoroa pulcherrima extracts and fractions significantly increased cercariae and worm mortality in a concentration-dependent manner. The methanolic extract was the most active on cercariae with a LC50of 20.65 µg/mL after 30 minutes, while the n-hexane fraction was the most active on worm with a LC50 of 79.54 μg/mL (65.58 – 96.47 μg/mL) after 48 hours. Significant reduction of motor activity (18.47 to 100%) was recorded for surviving worms incubated in different concentrations of the extracts and fractions.

Conclusion: This study proves that Ozoroa pulcherrima extracts and fractions have cercaricidal and schistosomicidal activities. Ozoroa pulcherrima may have great potential as an anti-schistosomal agent for further research.

Keywords:
Ozoroa pulcherrima, cercaricidal activity, schistosomicidal activity, Schistosoma mansoni

Article Details

How to Cite
Feussom, N. G., Jatsa, H. B., Kenfack, M. C., Nkondo, E. T., Femoe, U. M., Fassi, J. B. K., Tsague, C. D., Dongo, E., Dzeufiet, P. D. D., & Tchuente, L.-A. T. (2020). In vitro Activity of Ozoroa pulcherrima Schweinf. Extracts and Fractions on Schistosoma mansoni Cercariae and Adult Worms. European Journal of Medicinal Plants, 31(8), 17-30. https://doi.org/10.9734/ejmp/2020/v31i830256
Section
Original Research Article

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