DEFAR - Artigos publicados em periódicos

URI permanente para esta coleçãohttp://www.hml.repositorio.ufop.br/handle/123456789/531

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    Insignificant level of in vitro cytotoxicity, anti‑rotavirus, antibacterial, and antifungal activities of N‑alkylmaleamic acids.
    (2013) Belinelo, Valdenir José; Campos, Michele Soares Tacchi; Antunes, Rafael Martins; Assenço, Regina Aparecida Gomes; Vieira Filho, Sidney Augusto; Lanna, Maria Célia da Silva; Marçal, Eduardo da Costa; Fonseca, Thaisa Helena Silva; Gomes, Maria Aparecida; Magalhães, José Carlos de
    By reacting maleic anhydride with amines, we synthesized the derivatives N‑ethyl, N‑(2‑ethylamine), N‑piperidinyl, N‑phenyl, and N‑phenylhydrazinyl maleamic acids. The purity of these products was initially verified by melting range and the presence of only one spot observed by thin layer chromatography. The chemical structures of the obtained N‑alkyl maleamic acids were confirmed through infrared (IR) and hydrogen and carbon nuclear magnetic resonance (1 H and 13C NMR) spectrometry. Due to the already proven pharmacological activity of maleimides, maleic anhydride and its N‑alkyl maleamic acids were subjected to in vitro assays to observe antiviral (SA‑11 rotavirus), antibacterial (Escherichia coli, Staphylococcus aureus, and Bacillus cereus), antifungal (Colletotrichum musae, Fusarium solani f. sp. phaseoli, Fusarium solani f. sp. piperis Alb., and Penicillium sp.), and antiprotozoal (Trichomonas vaginalis, Giardia lamblia, and Entamoeba histolytica) effects. To study the anti‑rotavirus properties, firstly the 3‑(4,5‑dimethylthiazol‑2‑yl)‑2‑5‑diphenyltetrazolium bromide (MTT) method was used to establish the median cytotoxicity concentration (CC50) of the compounds, using MA‑104 cell line. Under the experimental conditions used, cytotoxic, anti‑rotavirus, antibacterial, and antifungal properties were not observed for these compounds.
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    Pseudomonas aeruginosa em hospital da microrregião de Ouro Preto, Minas Gerais, Brasil.
    (2016) Souza, Gustavo Henrique Bianco de; Miranda, Renata Rezende; Inácio, Luciana de Jesus; Amparo, Tatiane Roquete; Vaz, Luana Beatriz Araújo; Fernandes, Maísa Angélica Silva; Mapa, Bruna de Carvalho; Teixeira, Luiz Fernando de Medeiros; Assenço, Regina Aparecida Gomes; Lanna, Maria Célia da Silva; Silva, Alessandra Júlia Santos; Campos, Marcela Maria de Castro; Rios, Elisa Maria Pedrosa da Fonseca
    A água representa o principal meio de transmissão de micro-organismos em centros de saúde, os quais podem causar infecções que são um grave problema de saúde pública. O objetivo desse estudo foi avaliar a qualidade microbiológica da água utilizada em um hospital da microrregião de Ouro Preto, Minas Gerais, Brasil. Foram coletadas doze amostras de água em pontos distintos para testes de detecção de coliformes totais e termotolerantes, assim como de outros microrganismos; além disso, testes de sensibilidade a antimicrobianos também foram realizados. A espécie bacteriana Pseudomonas aeruginosa foi detectada na amostra correspondente à água de enxágue de roupas limpas coletada na área limpa da lavanderia e foi identificada por coloração de Gram e análise automatizada utilizando o equipamento VITEK®. O isolado de P. aeruginosa mostrou-se sensível aos antibióticos usualmente utilizados no tratamento de infecções induzidas por esta bactéria, tais como cefalosporinas, fluorquinolonas, polimixinas e carbapenêmicos. Contudo, os resultados indicam a necessidade de maior atenção ao processo de higienização de roupas hospitalares, fato ainda negligenciado no Brasil.
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    Cytotoxicity, anti-poliovirus activity and in silico biological evaluation of constituents from Maytenus gonoclada (Celastraceae).
    (2014) Oliveira, Mauro Lúcio Gonçalves de; Assenço, Regina Aparecida Gomes; Silva, Grácia Divina de Fátima; Lopes, Júlio César Dias; Silva, Fernando César; Lanna, Maria Célia da Silva; Magalhães, José Carlos de; Duarte, Lucienir Pains; Vieira Filho, Sidney Augusto
    Objective: The in silico free access web tools PASS online and ChemMapper were used to predict potential biological activities of compounds 1 to 8 isolated from Maytenus gonoclada (Celastraceae). The constituents 4’-O-methylepigalocatequin (6), tingenone (7) and proanthocyanidin A (8), and ethanolic extracts were subjected to in vitro cytotoxicity using VERO cells and anti-Poliovirus assays. Methods: QSAR and molecular superposition, correlating the average number of pharmacophores were used in the prediction studies. Cellular line VERO ATCC CCL-81 was used to determine anti-Poliovirus effect, observed by colorimetric (MTT) method. The annexing V/propidium iodide assay was used to determine the occurrence of apoptosis in the cytotoxicity assays. Results: The experimental results found for constituents 6-8 were in accordance with observed data obtained through PASS online and ChemMapper simulation. Conclusion: Compound 7 showed higher cytotoxic and apoptosis induction properties, and 6 and 8 presented anti-Poliovirus activity.