Abstract
Aphloia theiformis (Vahl) Benn. is used as ethnical medicine for diverse diseases in the Indian Ocean islands and the East Africa region. This study investigated the potential immunomodulatory effect of the phenolic fraction of A. theiformis leaves and their anti-inflammatory potent. Phenolic fraction from the leaves of A. theiformis was obtained by methanol extract, and recovered by an aqueous solution of 5% HCl, then filtered. We investigated the potential immunomodulatory effect in rat, by flow cytometer. Anti-inflammatory activity was also investigated in carrageenan-induced paw oedema rat model. Results demonstrated an immunosuppressive effect on lymphocyte for all doses administered. However, we noted an interesting immunostimulant effect on monocytes and granulocytes number at high doses. Then, we noted an important anti-inflammatory-like effect for these doses in vivo. This work suggests the eventual use of this plant in the treatment of some inflammatory symptoms and immune dysfunctions.
Résumé
Extrêmement répandu dans les îles de l’océan Indien, Aphloia theiformis est très utilisée contre diverses maladies. Dans cette étude, nous nous sommes penchés sur les possibles effets immunomodulateur et anti-inflammatoire de la fraction phénolique d’Aphloia theiformis. Cette fraction phénolique est obtenue à partir de l’extrait méthanolique des feuilles d’Aphloia theiformis après récupération par une solution d’HCl à 5 %. L’activité immunomodulatrice a été réalisée par cytométrie en flux, et l’activité anti-inflammatoire par le biais du modèle d’oedème de la patte induit par la carragénine chez le rat. Pour ce qui est de l’activité immunomodulatrice, les résultats ont montré un effet suppressif sur les lymphocytes pour toutes les doses testées. Cependant, pour les doses élevées, on a noté un intéressant effet immunostimulant pour les sous-populations monocytaires et granulocytaires, suggérant ainsi un potentiel effet anti-inflammatoire qui a été démontré in vivo. Ces résultats ouvrent donc la voie à une utilisation potentielle de cette plante dans le traitement des symptômes inflammatoires et certains dysfonctionnements de la réponse immunitaire.
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Hsoidrou, S., Bousta, D., Lachkar, M. et al. Phytochemical screening, immunomodulatory and anti-inflammatory activities of the phenolic fraction of Aphloia theiformis (Vahl) Benn. plant used in comorian traditional medicine. Phytothérapie 12, 354–359 (2014). https://doi.org/10.1007/s10298-014-0875-1
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DOI: https://doi.org/10.1007/s10298-014-0875-1
Keywords
- Aphloia theiformis (Vahl) Benn.
- Immunomodulatory
- Anti-inflammatory
- Phytochemical screening
- Phenolic fraction