15 research outputs found

    Potential application for antimicrobial and antileukemic therapy of a flavonoid-rich fraction of Camellia sinensis

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    The antimicrobial and antileukemic effect of a purified fraction of flavonoids from the leaves of Camellia sinensis was evaluated. An extraction yield of 9.77 mg.g-1 total flavonoids was recovered through a pressurized liquid extraction associated with solid-phase extraction. This fraction was tested against pathogenic microorganisms (Staphylococcus, Salmonella, and Enterococcus), considering the minimum inhibitory concentration. In addition, the human monocyte cell line THP-1, derived from a patient with acute monocytic leukemia, was used for the antitumor assay. The results show that the flavonoid-rich fraction obtained by coupling a Pressurized Liquids Extraction in-line with a Solid Phase Extraction (PLE-SPE) has a high antimicrobial effect and resulted in cell cycle blockage G0 / G1, increased DNA fragmentation, and altered leukemic cell morphology. These results suggest that a flavonoid-rich fraction obtained from Camellia sinensis can be applied as potential adjuvants in chemotherapy treatment to mitigate the side effects caused by chemotherapy or even as a supplement to cancer therapy9 página

    Aspectos da ecologia e epidemiologia da população residente as margens do Rio Uberabinha (Uberlândia, Minas Gerais)

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    Trabalho de Conclusão de Curso (Graduação)O presente trabalho foi desenvolvido no período de outubro de 1992 a maio de 1994, junto a um grupo de moradores, residentes às margens do Rio Uberabinha

    Artificial feeding of partially engorged Amblyomma sculptum females through capillaries*

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    ABSTRACT. Abel I., Cunha N.C., Rangel C.P., Corrêa F.N. & Fonseca A.H. Artificial feeding of partially engorged Amblyomma sculptum females through capillaries. [Alimentação artificial de fêmeas parcialmente ingurgitadas de Amblyomma sculptum, por meio de tubos capilares]. Revista Brasileira de Medicina Veterinária, 38(supl. 3): 211-217, 2016. Departamento de Epidemiologia e Saúde Pública, Instituto de Veterinária, Universidade Federal Rural do Rio de Janeiro, BR 465, km 7, Campus Seropédica 23897-970, Seropédica, RJ, Brazil. E-mail: [email protected] This study presents the standardization of an artificial feeding technique using capillaries and discusses its effects on biological parameters of partially engorged Amblyomma sculptum females. Partially engorged females were sorted for mean baseline weight (71.94 mg, group I; 167.58 mg, group II). Females were detached from rabbits after 7 days of feeding and then exposed to capillary tubes containing citrated bovine blood for 6, 12, and 24 h. Biological parameters were analyzed for each weight group, after each period. All ticks fed on this system took blood meal. Weights before and after artificial feeding were compared, and significant difference was observed. Mean weight gain for group I females artificially fed for 6, 12, and 24 h was 56.05, 86.75 and 192.89 mg, respectively. Weight gain in group II females fed for 6, 12 and 24 h was 133.73, 182.09 and 368.77 mg. Results indicate that capillary feeding may be used routinely in studies on pathogen transmission by A. sculptum females. The ideal initial weight range is discussed in terms of the kind of study design

    Tratamento cirúrgico das sequelas de queimadura do pé Surgical treatment of the sequelae of foot burns

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    INTRODUÇÃO: O artigo versa sobre as sequelas causadas por queimadura na região dos pés e as técnicas cirúrgicas para seu tratamento. Este trabalho visa a servir de auxílio a todos os médicos que tratam queimaduras, estabelecendo parâmetros de normalidade a serem buscados e técnicas cirúrgicas que auxiliem no tratamento. MÉTODO: É apresentada classificação das sequelas de queimadura do pé em três grupos, baseando-se no grau de comprometimento de suas estruturas anatômicas, e propondo abordagens cirúrgicas distintas para cada grupo. Três pacientes com diferentes lesões deformantes ilustram essa classificação e são tratados cirurgicamente. RESULTADOS: Houve evolução funcional com o emprego das técnicas cirúrgicas em todos os pacientes analisados. CONCLUSÕES: Existem muitas opções técnicas para o tratamento das sequelas de queimadura do pé. É importante que o cirurgião plástico assuma seu papel na assistência cirúrgica a esses pacientes, devendo estar preparado para o tratamento dessas lesões. O manejo desses pacientes tem início na fase aguda da queimadura, havendo necessidade de preparo do local para futuros procedimentos. A devolução da funcionalidade deve ser o objetivo da cirurgia, principalmente em crianças em fase de crescimento.BACKGROUND: This article describes the sequelae of burn injuries on the feet and surgical techniques for their treatment. This paper aims to help doctors treating burn injuries by establishing parameters of normality to be sought and effective surgical techniques for treatment. METHODS: The sequelae of burn injuries on the feet were classified into 3 groups on the basis of the degree of burns and the extent of involvement of the foot's anatomic structures. Suggested surgical approaches for each group are provided. Three patients with different deforming lesions treated surgically illustrate this classification. RESULTS: Improvement in function was evident after using the surgical techniques in all analyzed patients. CONCLUSIONS: There are several technical options for treating sequelae of burn injuries on the feet. The plastic surgeon must perform his/her role to assist these patients and treat these lesions. The treatment of these patients starts in the acute stage of the burn injury, during which it is necessary to prepare the area for future procedures. Restoring functionality must be the goal of the surgery, especially in growing children

    Efeitos cardiovascular e metabólico da reposição volêmica com solução salina hipertônica 7,5% associada ou não ao hidroxietilamido 130/0,4 em gatas com hipovolemia induzida

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    A hipovolemia é caracterizada por uma perda de fluido corpóreo, cursando com inadequado fluxo circulatório e consequentemente lesão tecidual. Neste trabalho, objetivou-se comparar a expansão volêmica resultante da administração de solução salina hipertônica (NaCl 7,5%), isolada ou em associação com hidroxietilamido 130/0,4 (HES 130/0,4), em gatas com hipovolemia induzida, sob anestesia geral inalatória com isofluorano. Foram utilizadas 12 gatas, sem raça definida, adultas, com massa corporal média de 3,07±0,56kg. Os animais foram anestesiados com isofluorano e, após a preparação cirúrgica, foram mantidos em 1CAM sob ventilação controlada. Após a estabilização do plano anestésico, foram avaliados os parâmetros basais. em ato contínuo, iniciou-se a fase de hipovolemia, por meio da retirada de 30ml kg-1 de sangue da artéria femoral. Após 60 minutos da estabilização do quadro de hipovolemia, foi realizada nova mensuração dos dados, alocando-se os animais aleatoriamente em dois grupos: GSH (grupo solução hipertônica, n=6), que receberam, na fase de expansão volêmica, NaCl 7,5% isolada, na dose de 4ml kg-1, e GSHC (grupo salina hipertônica associado ao coloide, n=6), que receberam NaCl 7,5%, na mesma dose citada, em associação com HES 130/0,4, na dose de 30ml kg-1. Após realização do tratamento, foram avaliados novamente os efeitos cardiovasculares e hemogasométricos por 120 minutos. As pressões arteriais média (PAM), sistólica (PAS) e diastólica (PAD) foram maiores logo após a expansão volêmica (T0) para o GSH. de T45 até T120, as PAM, PAS e PAD foram maiores para o GSHC, em comparação com o GSH. A pressão venosa central foi maior no GSHC até T60. Não foram observadas diferenças entre grupos para frequência cardíaca e respiratória, íons sódio e potássio, déficit de base, bicarbonato, saturação de oxigênio na hemoglobina, glicose, PaCO2, PaO2 e pH. Conclui-se que a administração de NaCl 7,5% isoladamente aumenta rapidamente a PAM, PAS e PAD em gatos com hipovolemia induzida, mantendo esse efeito por apenas 30 minutos, enquanto que a administração de hidroxietilamido 130/0,4 associado à NaCl 7,5% promove reestabelecimento mais tardio (após 30 minutos), porém mais duradouro (até 120 minutos) da PAM, PAS e PAD em gatas com hipovolemia induzida. A administração de HES 130/0,4 associada à NaCl 7,5% promove aumento acentuado da PVC por até 60 minutos após a administração.Hypovolemia is characterized by body fluid loss leading to an inadequate circulatory flow and consequently tissue injury. The aim of this study was to compare the volume expansion using hypertonic saline solution (NaCl 7.5%) alone or in combination with hydroxyethylstarch 130/0.4 (HES 130/0.4) in cats under general anesthesia with isoflurane and exposed to experimental hypovolemia. Twelve adult mixed breed cats, average weight of 3.07±0.56kg were used in this study. The queens were anesthetized using isoflurane and after surgical prepare, anesthesia were maintained with 1 MAC of isoflurane and the animals were mechanically ventilated. After waiting for anesthesia stabilization, baseline cardiovascular and hemogasometric parameters were recorded. Hypovolemia was induced by withdrawing 30mL kg-1 of blood from the femoral artery, after an hour, data were reassessed, and then, the animals were allocated into two groups: HSG (hypertonic saline group, n=6), which received 4mL kg-1 of 7.5% NaCl, and HSCG (hypertonic saline, associated to HES 130/0,4 group n=6) which received 4mL kg-1 of 7.5% NaCl associated to 30ml kg-1 of HES 130/0.4. After the treatments, cardiovascular and hemogasometric parameters were assessed for 120 minutes. Systolic blood pressure (SAP), diastolic blood pressure (DAP), mean arterial pressure (MAP) were significantly higher after volemic expansion on HSG at T0. From T45 to T120, SAP, DAP and MAP were significantly higher in HSCG when compared to HSG. Central venous pressure was higher in HSCG up to T60. There were no significant differences between groups on heart rate, respiratory rate, Na+, K+, base excess, bicarbonate, hemoglobin saturation, glucose, PaCO2, PaO2 and pH. The administration of 7.5% NaCl, promoted a faster increase in MAP, SAP and DAP in cats with induced hypovolemia and these effects were maintained for 30 minutes while the administration of HES 130/0.4 in combination with 7.5% NaCl promoted a delayed reestablishment (30 minutes after treatment) of MAP, SAP and DAP in cats with induced hypovolemia, but lasting up to T120. The combination of HES 130/0.4 and NaCl 7.5% promoted a significant increase on CVP for up to 60 minutes after the treatment
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