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Étude phytochimique et évaluation de l'activité anti-radicalaire, anti-inflammatoire, anti-drépanocytaire et cytotoxique des feuilles de Lippia multiflora Moldenke (Verbenaceae)

Authors: Colette Ashande MASENGO; Jean-Paul Koto-Te-Nyiwa NGBOLUA; Sarah L. OMEONGA; Nelly Panzu NZUZI; Guy B. ILUMBE; Pius Tshimankinda MPIANA;

Étude phytochimique et évaluation de l'activité anti-radicalaire, anti-inflammatoire, anti-drépanocytaire et cytotoxique des feuilles de Lippia multiflora Moldenke (Verbenaceae)

Abstract

Lippia multiflora est une plante aromatique utilisée en médecine traditionnelle pour traiter un certain nombre de maladies dont la drépanocytose. Le but de la présente étude est d’évaluer son efficacité et son innocuité in vitro. L’analyse micrographique de la poudre de L. multiflora par le réactif de Steimetz a permis d’identifier les cellules épidermiques, les stomates, les fragments de vaisseaux spiralées et les trichomes unicellulaires non glanduleux. Du point de vue phytochimique, cette plante contient les acides phénoliques, les flavonoïdes, les anthocyanes, les leuco-anthocyanes, les quinones liées, les coumarines, les anthraquinones, les iridoïdes, les saponines, les stéroïdes et les tri-terpènes. La teneur en polyphénols totaux est de 336 mg EAG/g d’extrait et tandis que celle des flavonoïdes totaux, des anthocyanes, des tanins condensés et hydrolysables sont respectivement de 6,61 mg EQ/g; 0,111 %; 0,425 %; 0,093 %. L’activité anti-oxydante du percolât (radical DPPH: CI50=73,6 µg/mL; radical ABTS: %I > 50 à 20 µg/mL) est supérieure à celle du décocté (radical DPPH: %I < 50 à 100 µg/mL; radical ABTS: CI50=78,9 µg/mL) et qu’en outre les feuilles de L. multiflora ne sont pas cytotoxiques (%Hémolyse <50 à 1000 µg/mL). Ces feuilles sont douées en outre des propriétés anti-inflammatoires (décocté: 36,3 % versus percolât: 62,0 %). Ces deux types d’extraits sont doués des propriétés anti-drépanocytaires in vitro. Cette plante bioactive étant probablement non cytotoxique, elle peut être développée et proposée comme candidat aliment fonctionnel pour le traitement symptomatique des crises drépanocytaires.

Keywords

acides phénoliques, Lippia multiflora, évidences scientifiques, aliment fonctionnel, anémie SS, couverture sanitaire universelle, agroécosystème productif., A, polyphénols, anti-inflammatoire, Lippia multiflora, in vitro, anti-drépanocytose, General Works

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popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
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influence
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