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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Avaliação in vitro do potencial antimicrobiano e da atividade antiproliferativa da Guapira Graciliflora Mart. (joão-mole)

Araújo, Thiara Karine de 28 July 2014 (has links)
Made available in DSpace on 2015-09-25T12:23:25Z (GMT). No. of bitstreams: 1 PDF - Thiara Karine de Araujo.pdf: 1613163 bytes, checksum: a957f23a80b49c364a5d41f8caa2a13e (MD5) Previous issue date: 2014-07-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The plants have been a rich source for therapeutic agents, serving as basis for the drug's synthesis, making an important source of new medicines for diseases that are yet without cure like infections and malignancies, in this context the Brazilian flora, due it's diversity, plays an important role in the discovery of potential antimicrobial drugs and antitumor. This work proposes to evaluate the antimicrobial potential of the hydroalcoholic extract of the Guapira Graciliflora Mart. (EOHG) thought the method of the microdilution in broth against strains of the Streptococcus mutans, Streptococcus salivarius, Streptococcus oralis, Streptococcus parasanguinis, Streptococcus mitis and Candida albicans, it's antiproliferative capacity in cell lines of squamous cell carcinome SCC 9, SCC 25 e HSC 3 by the essay MTT, additional to it's inducer potential of apoptosis observed by the test of annexin staining V/PI. The EOHG has presented antimicrobial activity over tested microorganisms, and the better results was observed in the bacteria S. mutans (12,50 µl/ µl), S. mitis (12,50 µl/ µl) and S. salivarius (6,25 µl/ µl), and in the clinical strains of Candida albicans (11) and Candida albicans (410), with CIMs of 0,5mg/ml and 2mg/ml, respectively. The EOHG, in the concentration of 200 µg/ml, have presented inhibition rates of 49% for the cells SCC9 and 63% for the cells HSC3 in the interval of 48h. The Rate of cellular apoptosis for HSC 3 was 19,29% on the time of 48h, additionally the tests of the annexin V/PI has revealed the induction of the cellular apoptosis, suggesting that the cellular membrane and nuclear have been damaged. Based in the results that have been presented, the Guapira Graciliflora Mart. is elected as a potential source of bioactive compound to be used in the treatment of oral infections and the CCEO. / As plantas têm sido uma rica fonte de agentes terapêuticos, servindo de base para síntese de fármacos, constituindo importante fonte de novos medicamentos para doenças que continuam sem cura como infecções e neoplasias malignas, nesse contexto a flora brasileira, por sua diversidade, desempenha papel importante na descoberta de potenciais drogas antimicrobianas e antitumorais. O presente trabalho se propôs a avaliar o potencial antimicrobiano do extrato hidroalcóolico da Guapira Graciliflora Mart. (EOHG) através do método da microdiluição em caldo frente a cepas de Streptococcus mutans, Streptococcus salivarius, Streptococcus oralis, Streptococcus parasanguinis, Streptococcus mitis e Candida albicans, sua capacidade antiproliferativa em linhagens celulares de carcinoma de células escamosas SCC 9, SCC 25 e HSC 3 pelo ensaio MTT, além de seu potencial indutor de apoptose observado pelo teste da coloração anexina V/PI. O EOHG apresentou atividade antimicrobiana sobre os microrganismos testados, s os melhores resultados foram observados nas bactérias S. mutans (12,50 µl/ µl), S. mitis (12,50 µl/ µl) e S. salivarius (6,25 µl/ µl), e nas cepas clínicas de Candida albicans (11) e Candida albicans (410), com CIMs de 0,5mg/ml e 2mg/ml, respectivamente. O EOHG, na concentração de 200 µg/ml, apresentou taxas de inibição de 49% para as células SCC9 e 63% para as células HSC3 no intervalo de 48h. A taxa de apoptose celular para HSC 3 foi de 19,29% no período de 48h, adicionalmente o teste da anexina V/PI revelou indução de apoptose celular, sugerindo que houve danos a membrana celular e nuclear. Com base nos resultados apresentados, a Guapira Graciliflora Mart. representa uma potencial fonte de compostos bioativos a serem utilizados no tratamento das infecções orais e do CCEO.

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