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Previous issue date: 2017-06-22 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / A obesidade ? considerada um importante problema de sa?de p?blica, sendo um fator de risco para v?rias doen?as cr?nicas como doen?as cardiovasculares, hipertens?o, diabetes e outras. A Baccharis trimera (Less.) DC, conhecida popularmente como carqueja, ? uma planta medicinal utilizada na medicina tradicional em v?rias partes do Brasil. Para tal, infus?es, decoc??es e tinturas de suas folhas s?o produzidas e utilizadas para o tratamento da obesidade, diabetes, assim como diur?ticos, agentes digestivos, antiinflamat?rios, dentre outros. Neste trabalho, com intuito de respaldar o potencial medicinal da carqueja, extratos de folhas de Baccharis trimera foram obtidos, caracterizados qu?mica e fitoquimicamente e avaliados com rela??o ? sua atividade antioxidante e antiadipog?nica. Foram obtidos tr?s extratos: aquoso (AE), decoco (AE-D) e metan?lico (ME); a partir destes, foram realizados seis diferentes ensaios antioxidantes in vitro: ensaio do radical super?xido e hidroxila, poder redutor, capacidade antioxidante total e quela??o dos ?ons ferro e cobre. Bem como, foi avaliada sua poss?vel atividade antiadipog?nica com os testes de oil red O, glicerol livre e mensura??o de fatores de transcri??o adipog?nicos C/EBP?, C/EBP? e PPAR?. Na caracteriza??o fitoqu?mica, revelou-se a presen?a de flavonoides (?cido clorog?nico e apigenina) e compostos fen?licos nos extratos AE e AE-D. Quanto a atividade antioxidante, verificou-se uma atividade dose-dependente. Em rela??o ? atividade antiadipog?nica, a Baccharis trimera inibiu significantemente tanto a diferencia??o e ac?mulo de gordura nos adip?citos pelo MDA, quanto a express?o dos fatores de transcri??o C/EBP?, C/EBP? e PPAR?, durante a adipog?nese todas em rela??o dose-dependente. Este trabalho sugere que Baccharis trimera possui ?tima atividade antioxidante, prevenindo o estresse oxidativo, podendo contribuir para a diminui??o da adipog?nese, al?m de possuir ?tima atividade antiadipog?nica. Este foi o primeiro trabalho que demonstrou o potencial efeito de extratos de Baccharis trimera na diferencia??o de adip?citos 3T3-L1 em adip?citos. / Obesity is considered an important public health problem, being a risk factor for several chronic diseases such as cardiovascular diseases, hypertension, diabetes and other. Baccharis trimera (Less.) DC (carqueja) is a medicinal plant used in traditional medicine in various parts of Brazil. Infusions, decoctions and tinctures of its leaves are produced and used for the treatment of obesity and diabetes, and also as diuretics, digestive agents, anti-inflammatory drugs, among others. In this work, in order to support the medicinal potential of carqueja, extracts of Baccharis trimera leaves were obtained, characterized chemically and phytochemically and evaluated in relation to their antioxidant and antiadipogenic activities. Three extracts were obtained: aqueous (AE), decoco (AE-D) and methanolic (ME); From these, six different in vitro antioxidant assays were performed: superoxide and hydroxyl radical assay, reducing power, total antioxidant capacity and chelation of iron and copper ions. As well, its possible antiadipogenic activity was evaluated with oil red O, free glycerol and measurement of adipogenic transcription factors C / EBP?, C / EBP? and PPAR?. Phytochemical characterization revealed the presence of flavonoids (chlorogenic acid and apigenin) and phenolic compounds in extracts AE and AE-D. As for the antioxidant activity, a dose-dependent activity was observed. Regarding antiadipogenic activity, Baccharis trimera significantly inhibited the differentiation and accumulation of fat in adipocytes by MDA in a dose-dependent relationship and significantly reduced the expression of the transcription factors C / EBP?, C / EBP? and PPAR?, during adipogenesis in a relation dose-dependent too. This work suggests that Baccharis trimera has an excellent antioxidant activity, preventing oxidative stress, and may contribute to the decrease of adipogenesis, besides having an excellent antiadipogenic activity. This was the first work that demonstrated the potential effect of Baccharis trimera extracts on the differentiation of 3T3-L1 adipocytes into adipocytes.
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/23774 |
| Date | 22 June 2017 |
| Creators | Nascimento, Daniele de Souza Marinho do |
| Contributors | 76111830449, http://lattes.cnpq.br/4651814546820796, Ramalho, Heryka Myrna Maia, 03277964485, http://lattes.cnpq.br/7004568465714771, Rodrigues, Karla Danielly da Silva Ribeiro, 00981527426, Rocha, Hugo Alexandre de Oliveira |
| Publisher | PROGRAMA DE P?S-GRADUA??O EM CI?NCIAS DA SA?DE, UFRN, Brasil |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
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