Antibacterial and Antioxidant Activities of Plants Consumed by Western Lowland Gorillas in Gabon

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Antibacterial and Antioxidant Activities of Plants Consumed by Western Lowland Gorillas in Gabon

Activités antibactériennes et antioxydantes des plantes consommées par les gorilles des plaines de l’Ouest au Gabon

Abstract / Résumé

EN – This study explores the medicinal potential of plants consumed by western lowland gorillas (Gorilla gorilla gorilla) in Gabon’s Moukalaba-Doudou National Park. Four species (Ceiba pentandra, Myrianthus arboreus, Ficus spp., and Milicia excelsa) were analyzed for their antioxidant and antibacterial properties. Antioxidant activity was measured using DPPH radical scavenging, phosphomolybdenum, and β-carotene bleaching assays. Antibacterial tests targeted multidrug-resistant Escherichia coli strains using diffusion and microdilution methods to determine inhibition zones, MIC, and MBC values. Results revealed significant antioxidant and antimicrobial properties in all plant extracts, with notable levels of phenolics, flavonoids, tannins, and proanthocyanidins. These findings suggest that these species could serve as promising candidates for the development of new natural therapeutic agents.

FR – Cette étude examine le potentiel médicinal des plantes consommées par les gorilles des plaines de l’Ouest (Gorilla gorilla gorilla) dans le parc national de Moukalaba-Doudou au Gabon. Quatre espèces végétales (Ceiba pentandra, Myrianthus arboreus, Ficus spp. et Milicia excelsa) ont été analysées pour leurs propriétés antioxydantes et antibactériennes. L’activité antioxydante a été évaluée via les méthodes DPPH, complexe phosphomolybdène et décoloration du β-carotène. Des tests antibactériens ont été menés sur des souches multirésistantes d’Escherichia coli, en utilisant la diffusion sur disque et la microdilution pour déterminer les zones d’inhibition, les CMI et CMB. Les résultats ont mis en évidence des propriétés antioxydantes et antimicrobiennes significatives dans tous les extraits, avec des teneurs importantes en composés phénoliques, flavonoïdes, tanins et proanthocyanidines. Ces espèces apparaissent comme de potentielles sources naturelles pour de nouveaux agents thérapeutiques.

Authors / Auteurs

Leresche Even Doneilly Oyaba Yinda, Richard Onanga, Cédric Sima Obiang, Herman Begouabe, Étienne François Akomo-Okoue, Judicaël Obame-Nkoghe, Roland Mitola, Joseph-Privat Ondo, Guy-Roger Ndong Atome, Louis-Clément Obame Engonga, Ibrahim, Joanna M. Setchell, Sylvain Godreuil

DOI :https://doi.org/10.1371/journal.pone.0306957


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