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1.
Biosci. j. (Online) ; 37: e37055, Jan.-Dec. 2021. ilus, tab, graf
Article in English | LILACS | ID: biblio-1359781

ABSTRACT

Breast cancer appears as the main gynecological cancer and presents high morbidity and mortality. Because most diagnoses are made belatedly, it is necessary to seek therapeutic options that aim for advanced stages of the disease. This study aims to evaluate the antitumoral action of Stryphnodendron adstringens fruit extracts on 4T1 murine mammary carcinoma cell culture. The inhibitory potential of S. adstringens fruit extract on the metalloproteinases (MMPs) 2 and 9 was evaluated through zymography. From these results, MTT assays were performed to evaluate the extracts' effects on the murine mammary carcinoma 4T1 line cell viability. From the crude extract, the following extracts were obtained: hydroalcoholic (SAFCEA), hexane (SAFCEB), chloroform (SAFCEC), and ethyl acetate (SAFCED). Lastly, the migration of the cells treated with extracts SAFCEA and SAFCED was verified. The hydroalcoholic extract (SAFCEA) was the most efficient in inhibiting gelatinases. During the phytochemical study, it was noted that alkaloids were present in all partitions. The 50 % growth inhibition (IC50) concentrations found were: 40.1 µg/mL (SAFCEA) and 70.14 µg/mL (SAFCED). After the cellular cytotoxicity assay, cell morphology was altered by treatment with the selected partitions (SAFCEA and SAFCED), obtaining morphology consistent with apoptosis. The results demonstrate that S. adstringens extracts exhibit the inhibitory activity of MMP-2 and MMP-9 as well as cytotoxicity toward 4T1 tumor cells. These findings indicate that follow-up studies of the partitions from S. adstringens may lead to the development of novel chemotherapeutics for oncological treatments.


Subject(s)
Breast Neoplasms , Stryphnodendron barbatimam/therapeutic use
2.
Rev. bras. plantas med ; 15(4): 520-528, 2013. graf, tab
Article in English | LILACS | ID: lil-695237

ABSTRACT

The purpose of this study was to screen the antioxidant activity of medicinal plant extracts from the Brazilian cerrado, through other methods than the total phenolic content and its correlation with the antioxidant activity. Ethanolic extracts of ten species were evaluated through three antioxidant assays, in vitro, including 2,2-diphenyl-1-picrylhydrazyl (DPPH), total antioxidant activity and reducing power; and by using the Folin-Ciocalteu method the total phenolic content was determined. Ethanolic extracts of Stryphnodendron obovatum, Cecropia pachystachya and Duguetia furfuraceae showed strong antioxidant activity (IC50<5 µg mL-1) in the DPPH free radical scavenging assay; the species Vernonia phosphorea, Hymenaea stignocarpa and Jacaranda ulei may also be highlighted. These results were confirmed in the assays of total antioxidant capacity and reducing power. The extracts of S. obovatum and V. phosphorea showed an abundant phenolic content; therefore, the phenolic content may play a role in the antioxidant activity. These two species, traditionally used in Brazil, showed great power in these assay systems and may be a promising source for the development of natural antioxidants and future candidates for phytochemical and pharmacological studies in related diseases.


O objetivo desse trabalho foi triar a atividade antioxidante de extratos de plantas medicinais do cerrado do Brasil, por outros métodos além do conteúdo de fenóis totais e sua correlação com a atividade antioxidante. Assim, o extrato etanólico de dez espécies vegetais do cerrado brasileiro foi avaliado por três ensaios de atividade antioxidante, in vitro: 2,2-difenil-1-picrilhidrazil (DPPH); atividade antioxidante total e poder redutor; e o teor de fenóis determinado pelo reagente de Folin-Ciocalteu. O extrato etanólico de Stryphnodendron obovatum, Cecropia pachystachya e Duguetia furfuraceae apresentaram forte atividade antioxidante (CI50<5 mg mL-1) no ensaio com o DPPH, tendo destaque também as espécies Vernonia phosphorea, Hymenaea stignocarpa e Jacaranda ulei. Os extratos de S. obovatum e V. phosphorea demonstraram maiores teores de fenóis, indicando que esse grupo de substâncias possa ser a responsável pela atividade antioxidante. Essas duas espécies, usadas tradicionalmente no Brasil, representam fontes promissoras para o desenvolvimento de antioxidantes naturais e futuros estudos fitoquímicos e farmacológicos em doenças relacionadas.


Subject(s)
Plant Extracts/analysis , Antioxidants/analysis , Phenols/analysis , Plants, Medicinal/adverse effects , Stryphnodendron barbatimam/therapeutic use , Grassland , Vernonia/adverse effects
3.
Rev. odonto ciênc ; 23(2): 141-144, abr.-jun. 2008. tab
Article in Portuguese | LILACS, BBO | ID: biblio-873602

ABSTRACT

Objetivo: O Stryphnodendron adstringens (barbatimão) é uma leguminosa do cerrado brasileiro, considerada como planta medicinal devido à sua ação cicatrizante, antiinflamatória, hemostática, anti-séptica e anti-diarréica. Este trabalho avaliou a atividade antibacteriana do extrato hidroalcoólico bruto do barbatimão contra microrganismos da cárie dental. Metodologia: Para determinação da Concentração Inibitória Mínima (CIM) do extrato hidroalcoólico bruto de barbatimão sobre as cepas padrão Enterococcus faecalis, Streptococcus salivarius, Streptococcus sanguinis, Streptococcus mitis, Streptococcus mutans, Streptococcus sobrinus e Lactobacillus casei foi utilizado o método da diluição em caldo. Resultados: O extrato hidroalcoólico bruto de barbatimão foi ativo frente aos microrganismos S. mitis e L. casei. A CIM do extrato do barbatimão variou de 350 a >400µg/mL. Conclusão: A ação antibacteriana observada sugere o uso do extrato de barbatimão como adjuvante no controle da cárie dental.


Purpose: Stryphnodendron adstringens ('barbatimão') is a medicinal plant of the Leguminoseae family from the Brazilian 'cerrado'. This plant is used in folk medicine because of its healing, anti-inflammatory, antiseptic, and hemostatic effects. The aim of this work was to evaluate the antibacterial activity of the 'barbatimão' crude hydroalcoholic extract against cariogenic microorganisms. Methods: The broth dilution method was used to determine the Minimum Inhibitory Concentration (MIC) of the 'barbatimão' hydroalcoholic extract against Enterococcus faecalis, Streptococcus salivarius, Streptococcus sanguinis, Streptococcus mitis, Streptococcus mutans, Streptococcus sobrinus, and Lactobacillus casei. Results: The 'barbatimão' hydroalcoholic extract showed antibacterial activity against S. mitis e L. casei, with MIC ranging from 350 to >400µg/mL. Conclusion: These results suggest that the 'barbatimão' hydroalcoholic extract might be used as an adjuvant measure to control dental caries.


Subject(s)
Dental Caries/drug therapy , Stryphnodendron barbatimam/therapeutic use , Products with Antimicrobial Action
4.
Rev. ciênc. farm ; 17: 181-6, 1996. tab
Article in Portuguese | LILACS | ID: lil-198468

ABSTRACT

Calendula offininalis L. e Stryphnodendron barbadetiman (Vellozo) Martius säo usados no Brasil para o tratamento de queimaduras solares, domésticas ou de processo inflamatórios externos. As propriedades cicatrizantes destas substâncias säo bem conhecidas pelo leigo. Neste trabalho, procuramos verificar se estas duas plantas säo eficazes também em cicatrizar lesöes rebeldes como a úlcera varicosa. Para isso, foram selecionados quatro grupos de pacientes: dois (I eII) apresentando úlcera varicosa e dois outros (I e IV) apresentando lesöes domésticas. Os grupos I e III foram tratados com calêndula mais barbatimäo. Nossos resultados sugerem que ambos os tratamentos säo eficazes no processo que leva à cicatrizaçäo da ferida. Fica estabelecido, entäo, um tratamento alternativo para lesöes rebeldes como alguns tipos de úlcera varicosa


Subject(s)
Humans , Calendula/therapeutic use , Wound Healing , Skin/injuries , Stryphnodendron barbatimam/therapeutic use , Varicose Ulcer/drug therapy
5.
Arq. Centro Estud. Curso Odontol ; 19(1): 79-91, jan.-jun. 1982. ilus, tab
Article in Portuguese | LILACS, BBO | ID: lil-150312

ABSTRACT

Os autores estudaram, na glândula submandibular, os efeitos da administraçäo de 15 ml/kg de peso corporal de extrato de sementes de Barbatimäo, diretamente no estômago, após canulaçäo do animal, durante 7 dias. Foram observadas as seguintes alteraçöes: ácinos de menor tamanho com células mais baixos, de citoplasma mais acidófilo, com numerosas figuras de mitose normais e com núcleos das células acinares e dos ductos estriados mais volumosos e de cromatina mais densa. Essas alteraçöes foram avaliadas morfometricamente


Subject(s)
Animals , Male , Female , Adult , Rats , Submandibular Gland , Submandibular Gland/pathology , Stryphnodendron barbatimam/therapeutic use
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