Comparison of metabolic profiles and bioactivities of the leaves of three edible Congolese Hibiscus species
Auteur(s): Mutwale Kapepula Paulin, Ngombe Kabamba Nadège, Tshisekedi Tshibangu Pascal, Mumba Ngoie Dieudonné, Tshala Katumbay Désiré, Kalenda T. Dibungi PascalNom de la revue/Journal: Natural product research
Mois: décembre
Volume: 31
Numéro: 24
Année: 2017
pages: 2885-2892
Résumé
<p><span style="background-color:rgb(255,255,255);color:rgb(33,33,33);">Methanolic and dichloromethane extracts from the leaves of Congolese Hibiscus species were characterised by chromatographic and spectroscopic techniques and their in vitro biochemical activities against ROS production were evaluated in cellular models and on an enzyme, myeloperoxidase (MPO), involved in inflammation. Hibiscus acetosella has a chemical fingerprint different from Hibiscus cannabinus and Hibiscus sabdariffa both having similar fingerprints. Major compounds were polyphenols, represented mainly by caffeoyl-hydroxycitric acid for H. acetosella and neochlorogenic acid for the two other species. All extracts displayed high cellular antioxidant activity with IC</span>50<span style="background-color:rgb(255,255,255);color:rgb(33,33,33);"> values ranging from 0.5 to 3 μg mL</span>-1<span style="background-color:rgb(255,255,255);color:rgb(33,33,33);"> using lucigenin on neutrophils. Dichloromethane extracts showed more efficient effects on extracellular ROS production and MPO activity. Antioxidant and anti-inflammatory activities of caffeoyl-hydroxycitric acid were significantly higher than those of neochlorogenic acid. The bioactivities of Hibiscus species were positively correlated with their phytochemical content and could justify their use as local nutraceutical resources and medicines.</span></p>