Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/60099

TitleBioactive properties of Tabebuia impetiginosa-based phytopreparations and phytoformulations: a comparison between extracts and dietary supplements
Author(s)Pires, Tânia C. S. P.
Dias, Maria Inês
Calhelha, Ricardo C.
Carvalho, Ana Maria
Queiroz, Maria João R. P.
Barros, Lillian
Ferreira, Isabel C. F. R.
KeywordsTabebuia impetiginosa
methanolic extract
infusion
dietary supplements
antioxidants
cytotoxicity
chemical composition
Methanolic extract/infusion/dietary supplements
Issue date21-Dec-2015
PublisherMultidisciplinary Digital Publishing Institute
JournalMolecules
Abstract(s)<i>Tabebuia impetiginosa</i> (Mart. ex DC.) Standl. has been used in traditional medicine for many centuries, being nowadays marketed as dried plant material (inner bark) for infusions, pills, and syrups. The main objective of the present work was to validate its popular use through the bioactivity evaluation of the inner bark (methanolic extract and infusion) and of two different formulations (pills and syrup) also based on the same plant-material. The antioxidant activity was evaluated by in vitro assays testing free radical scavenging activity, reducing power and inhibition of lipid peroxidation in brain homogenates. The cytotoxicity was determined in four human tumor cell lines (MCF-7, NCI-H460, HeLa and HepG2, and also in non-tumor cells (porcine liver primary cells, PLP2)). Furthermore, the sample was chemically characterized regarding free sugars, organic acids, fatty acids, and tocopherols. Syrup and methanolic extract showed the highest antioxidant activity, related to their highest amount of phenolics and flavonoids. Methanolic extract was the only sample showing cytotoxic effects on the tested human tumor cell lines, but none of the samples showed toxicity in PLP2. Glucose and oxalic acid were, respectively, the most abundant sugar and organic acid in the sample. Unsaturated predominated over the saturated fatty acids, due to oleic, linoleic, and linolenic acids expression. α- and γ-Tocopherols were also identified and quantified. Overall, <i>T. impetiginosa</i> might be used in different phytoformulations, taking advantage of its interesting bioactive properties and chemical composition.
TypeArticle
URIhttp://hdl.handle.net/1822/60099
DOI10.3390/molecules201219885
ISSN1420-3049
Peer-Reviewedyes
AccessOpen access
Appears in Collections:BUM - MDPI
CDQuim - Artigos (Papers)

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