8
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      A proposal for the quality control of Tanacetum parthenium (feverfew) and its hydroalcoholic extract Translated title: Uma proposta para o controle de qualidade de Tanacetum parthenium (tanaceto) e seu extrato hidroalcoólico

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          In this study, we present a proposal for the physical and chemical quality control of the powder of the species T. parthenium (feverfew) and its hydroalcoholic extract obtained by percolation. The sesquiterpene lactone parthenolide, the main active compound of this plant, was quantified by HPLC and its content was found to be 0.49% in the powder and 1.06% in the extract. The total content of flavonoids, determined by UV spectroscopy, was found to be 0.54% in the powder and 1.05% in the hydroalcoholic extract. Santin, the main flavonoid of this species, was isolated and further identified in the extract by HPLC. Since parthenolide can also be found in other Asteraceae species, the analysis of santin is important to certify the authenticity of the plant material. The results confirmed the authenticity of the plant material and the efficiency of the extraction procedure.

          Translated abstract

          Neste trabalho, é apresentada uma proposta para o controle de qualidade físico e químico do pó de T. parthenium (tanaceto) e do seu extrato hidroalcoólico obtido por percolação. A lactona sesquiterpênica partenolídeo, o principal componente ativo da espécie, foi quantificada por CLAE e seu teor foi de 0,49% no pó e 1,06% no extrato. O teor de flavonóides totais foi determinado por espectroscopia no UV e foi de 0,54% no pó e 1,05% no extrato hidroalcoólico. A santina, principal flavonóide da espécie, foi isolada e posteriormente identificada no extrato por CLAE. Uma vez que o partenolídeo também pode ser encontrado em outras espécies de Asteraceae, a análise da santina é importante para certificar a autenticidade do material vegetal. Os resultados obtidos neste trabalho confirmam a autenticidade do material e a eficiência do processo extrativo.

          Related collections

          Most cited references27

          • Record: found
          • Abstract: not found
          • Article: not found

          Farmacopeia Brasileira

            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Cysteine 38 in p65/NF-kappaB plays a crucial role in DNA binding inhibition by sesquiterpene lactones.

            Sesquiterpene lactones (SLs) have potent anti-inflammatory properties. We have shown previously that they exert this effect in part by inhibiting activation of the transcription factor NF-kappaB, a central regulator of the immune response. We have proposed a molecular mechanism for this inhibition based on computer molecular modeling data. In this model, SLs directly alkylate the p65 subunit of NF-kappaB, thereby inhibiting DNA binding. Nevertheless, an experimental evidence for the proposed mechanism was lacking. Moreover, based on experiments using the SL parthenolide, an alternative mode of action has been proposed by other authors in which SLs inhibit IkappaB-alpha degradation. Here we report the construction of p65/NF-kappaB point mutants that lack the cysteine residues alkylated by SLs in our model. In contrast to wild type p65, DNA-binding of the Cys(38) --> Ser and Cys(38,120) --> Ser mutants is no longer inhibited by SLs. In addition, we provide evidence that parthenolide uses a similar mechanism to other SLs in inhibiting NF-kappaB. Contrary to previous reports, we show that parthenolide, like other SLs, inhibits NF-kappaB most probably by alkylating p65 at Cys(38). Although a slight inhibition of IkappaB degradation was detected for all SLs, the amount of remaining IkappaB was too low to explain the observed NF-kappaB inhibition.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Validation of chromatographic methods in biomedical analysis. Viewpoint and discussion.

              R Causon (1997)
              Bioanalytical method validation is the process used to establish that a quantitative analytical method is suitable for biomedical applications. Reassurances as to the quality of the method and its reliability come from adopting a minimum series of validation experiments and obtaining satisfactory results. Consistent evaluation of the key analytical parameters: recovery, response function, sensitivity, precision, accuracy, selectivity and stability, is discussed with a view to improving scientific standards in manuscripts submitted for publication.
                Bookmark

                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                rbfar
                Revista Brasileira de Farmacognosia
                Rev. bras. farmacogn.
                Sociedade Brasileira de Farmacognosia (Curitiba )
                1981-528X
                September 2008
                : 18
                : 3
                : 360-366
                Affiliations
                [1 ] Universidade de São Paulo Brazil
                Article
                S0102-695X2008000300009
                10.1590/S0102-695X2008000300009
                685fbe43-2fdf-4e93-a276-a14172adeda5

                http://creativecommons.org/licenses/by/4.0/

                History
                Product

                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0102-695X&lng=en
                Categories
                PHARMACOLOGY & PHARMACY

                Pharmacology & Pharmaceutical medicine
                Tanacetum parthenium,Asteraceae,quality control,HPLC quantification,hydroalcoholic extract,flavonoids,parthenolide,controle de qualidade,quantificação por CLAE,extrato hidroalcoólico,flavonóides,partenolídeo

                Comments

                Comment on this article