Made available in DSpace on 2014-12-17T14:13:38Z (GMT). No. of bitstreams: 1
HerbertAAACNS.pdf: 3100523 bytes, checksum: 4111a43f69e73ce7d230df19b46386db (MD5)
Previous issue date: 2009-05-08 / Medicinal plants have been used since antiquity to treat various human diseases. The leaves of Bauhinia monandra are widely used in Brazil as herbal remedies in the treatment of Diabetes Mellitus. From the leaves of B. monandra was purified a galactose-specific lectin, called BmoLL, which also showed a significant hypoglycemic capacity. Following the proposed rules by decree No 116 of 1996/08/08 of the Ministry of Health of Brazil, the study aimed to evaluate the
potential for toxicity and mutagenicity of BmoLL from the use of tests with Escherichia coli strain CC104 (Forward mutagenesis assay) with Salmonella typhimurium strain TA (Kado test), with plasmid pBCKS (Break occurrences in
plasmid DNA) and enzyme exonuclease III (Search of abasic sites). The results demonstrated that the lectin was unable to increase the frequency of reverse mutation of strains of S. typhimurium, with and without metabolic activity. However, a
significant decrease in the frequency of spontaneous mutation was observed in strains of E. coli, especially in poor repair (CC104mutMmutY), indicating an antioxidant potential of the lectin. BmoLL is unable to generate genotoxic and
cytotoxic damage, based on the concentrations and the tests performed / As plantas medicinais t?m sido usadas desde a antiguidade no tratamento de diversas enfermidades humanas. As folhas de Bauhinia monandra s?o amplamente utilizadas no Brasil como fitoter?pico no tratamento do Diabetes Mellitus. A partir das
folhas de B. monandra, foi purificada uma lectina galactose-espec?fica, denominada de BmoLL, que tamb?m apresentou uma importante capacidade hipoglicemiante. Seguindo as normas propostas pela portaria n? 116 de 08/08/1996 do Minist?rio da Sa?de do Brasil, o trabalho objetivou avaliar o potencial de mutagenicidade e toxicidade da BmoLL a partir da utiliza??o dos testes com cepas de Escherichia coli
da linhagem CC104 (Teste de mutag?nese direta), com cepas de Salmonella typhimurium da linhagem TA (Teste de Kado), com plasm?deo pBCKS (Quebra de DNA plasmidial) e com enzima Exonuclease III (Detec??o de s?tios ab?sicos). Os
resultados demonstraram que a lectina foi incapaz de aumentar a freq??ncia de muta??o reversa das cepas de S. typhimurium, com e sem ativador metab?lico. No entanto, uma diminui??o significativa na freq??ncia de muta??o espont?nea foi observada nas cepas de E. coli, especialmente na deficiente de reparo (CC104mutMmutY), indicando um potencial antioxidante da lectina. A BmoLL ? incapaz de gerar danos genot?xicos e citot?xicos, com base nas concentra??es
testadas e nos ensaios realizados
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/13226 |
| Date | 08 May 2009 |
| Creators | Sisenando, Herbert Ary Arzabe Antezamana Costa N?brega |
| Contributors | CPF:32398336468, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4781004Y8, Paiva, Patr?cia Maria Guedes, CPF:36565431434, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4787593U2&dataRevisao=null, Almeida, Maria das Gra?as, CPF:20054548420, http://lattes.cnpq.br/0321740024191482, Medeiros, S?lvia Regina Batistuzzo de |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Ci?ncias da Sa?de, UFRN, BR, Ci?ncias da Sa?de |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Repositório Institucional da UFRN, instname:Universidade Federal do Rio Grande do Norte, instacron:UFRN |
| Rights | info:eu-repo/semantics/openAccess |
Page generated in 0.0023 seconds