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Lamiaceae extracts as a source of phytochemicals with promissory antioxidant properties

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dc.contributor.authorMartins, Natália
dc.contributor.authorHeleno, Sandrina A.
dc.contributor.authorBarros, Lillian
dc.contributor.authorSantos-Buelga, Celestino
dc.contributor.authorFerreira, Isabel C.F.R.
dc.date.accessioned2015-11-11T14:45:45Z
dc.date.available2015-11-11T14:45:45Z
dc.date.issued2015
dc.description.abstractPlant extracts have been used over years due to their marked healing properties. Primitive societies used them not only as botanical preparations for therapeutic uses, but also as prophylaxis and for psychological effects. Despite the recognized millenary health evidences, numerous phytochemicals responsible for those benefits remain unknown. Among the heterogeneous group of secondary metabolites, phenolic compounds have been pointed out as relevant bioactive phytochemicals [1-3]. Furthermore, the culinary uses of different plant species associated to their biological activities highlight them as potential functional foods. The aim of the present work was to evaluate the antioxidant potential of aqueous (infusion and decoction) and methanol/water (80:20, v/v) extracts of three Lamiaceae plant species used with culinary and medicinal purposes, Origanum vulgare L. (oregano), Thymus vulgaris L. (thyme) and Salvia officinalis L. (sage), and to relate it with the phenolic profile assessed by HPLC-DADESI/ MS. In general, aqueous extracts evidenced the highest antioxidant potential (lipid peroxidation inhibition free radicals scavenging activity and reducing power). This potential seems to be related with the abundance in phenolic compounds, once sage that showed the highest antioxidant activity, also gave the highest concentration both in phenolic acid derivatives and flavonoids, followed by thyme and oregano. In all the studied samples, rosmarinic acid and luteolin derivatives (especially luteolin 7-Oglucuronide and luteolin 7-O-glucoside) were the most abundant phenolic acid derivatives and flavonoids, respectively. Other abundant phenolic compounds present in these matrices were apigenin derivatives (in oregano and sage), hesperetin and eriodictyol derivatives (in thyme), hispidulin glucuronide (in sage), caffeic acid dimers, trimers and tetramers (in sage), and lithospermic acid A (a caffeic acid tetramer), quercetin and kaempferol derivatives (in oregano and thyme). Overall, flavonoids followed by phenolic acid derivatives were the classes involved in the antioxidant potential of the tested Lamiaceae extracts. These species might be used as functional foods, but more studies are necessary in order to elucidate the mechanisms of action involved, as well as the bioavailability of the different phenolic compounds and related metabolic pathways.pt_PT
dc.identifier.citationMartins, Natália; Heleno, Sandrina A.; Barros, Lillian; Santos-Buelga, Celestino; Ferreira, Isabel C.F.R. (2015). Lamiaceae extracts as a source of phytochemicals with promissory antioxidant properties. In EuroFoodChem XVIII International Conference 2015. Madridpt_PT
dc.identifier.urihttp://hdl.handle.net/10198/12323
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPLANTAS MEDICINAIS A UTILIZAR EM FITOTERAPIA COMO ANTI-FÚNGICOS: EFEITO DE COMPOSTOS FENÓLICOS NO CRESCIMENTO DE ESPÉCIES DE CANDIDA EM SUSPENSÃO E EM BIOFILMES
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectMedicinal and aromatic plantspt_PT
dc.subjectAntioxidant activitypt_PT
dc.subjectPhenolic compoundspt_PT
dc.titleLamiaceae extracts as a source of phytochemicals with promissory antioxidant propertiespt_PT
dc.typeconference object
dspace.entity.typePublication
oaire.awardTitlePLANTAS MEDICINAIS A UTILIZAR EM FITOTERAPIA COMO ANTI-FÚNGICOS: EFEITO DE COMPOSTOS FENÓLICOS NO CRESCIMENTO DE ESPÉCIES DE CANDIDA EM SUSPENSÃO E EM BIOFILMES
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/PEst-OE%2FAGR%2FUI0690%2F2014/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F87658%2F2012/PT
oaire.citation.titleEuroFoodChem XVIII International Conference 2015pt_PT
oaire.fundingStream5876
person.familyNameHeleno
person.familyNameBarros
person.familyNameFerreira
person.givenNameSandrina A.
person.givenNameLillian
person.givenNameIsabel C.F.R.
person.identifier469085
person.identifier144781
person.identifier.ciencia-id8B18-3095-6FC9
person.identifier.ciencia-id9616-35CB-D001
person.identifier.ciencia-id9418-CF95-9919
person.identifier.orcid0000-0001-7224-1098
person.identifier.orcid0000-0002-9050-5189
person.identifier.orcid0000-0003-4910-4882
person.identifier.ridL-5951-2014
person.identifier.ridJ-3600-2013
person.identifier.ridE-8500-2013
person.identifier.scopus-author-id30067731800
person.identifier.scopus-author-id35236343600
person.identifier.scopus-author-id36868826600
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typeconferenceObjectpt_PT
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