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Previous issue date: 2008-06-27 / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico / The mushrooms have been object of intense research in view of its potential raising of application in different sectors of the pharmacology and alimentary industry. Among diverse bioactive composites of polyssacharides nature that exist in the fungus the glucans are much searched. These are polymers of glucose and classified as the type of glicosidic linking [α, β]. Peroxisome proliferator-activated receptors (PPARs), ranscription factors belonging to the family of nuclear receptors that bind themselves o specific agonists, have shown their importance in controlling the inflammatory process. The aim of this study was to perform a chemical characterization of extract rom the mushroom Caripia montagnei, assess its antiinflammatory and antibacterial effect and determine if this effect occurs via PPAR. This mushroom is composed of carbohydrates (63.3?4.1%), lipids (21.4l?0.9%) and proteins (2.2? 0.3%). The aqueous solution resulting from the fractionation contained carbohydrates (98.7?3.3%) and protein (1.3?0.25%). Analyses of infrared spectrophotometry and of nuclear magnetic esonance demonstrated that the extract of mushroom C. montagnei is rich in β-glucans. In hioglycolate-induced peritonitis, the C. montagnei glucans (50 mg/kg) educed the inflammatory process in 65.5?5.2% and agonists, pharmacological igands, for PPAR: Wy-14643 (49.3?6.1%), PFOA (48.9?3.8%) and clofibrate in 45.2?3.2%. Sodium diclofenac showed a reduction of 81.65?0.6%. In the plantar edema, the glucans from C. montagnei (50 mg/kg) and L-NAME reduced the edema to a similar degree 91.4?0.3% and 92.8?0,5 %, respectively. In all the groups tested, nitric oxide (NO), an inflammation mediator, showed a significant reduction in the nitrate/nitrite levels when compared to the positive control (P<0.001). The C. montagnei glucans did not show cytotoxicity in the concentrations tested (2.5, 5.0, 10.0, 20.0 and 40.0 ?g/100 ?L). Antibacterial activity demonstrated that, unlike total extract, there was no inhibition of bacterial growth. The C. montagnei glucans show great potential for antiinflammatory applications. This effect suggests that it is mediated by PPAR activation and by COX and iNOS inhibition / Os fungos tem sido objeto de intensa pesquisa, tendo em vista seu elevado potencial de aplica??o em diferentes setores da ind?stria farmacol?gica e alimentar. Dentre os diversos compostos bioativos de natureza polissacar?dica presentes nos fungos as glucanas est?o entre os mais pesquisados. Estes s?o pol?meros de glucose amplamente distribu?dos na natureza e classificadas conforme o tipo de liga??o glicos?dica [α, β]. Os Receptores Ativados por Proliferadores de Peroxissoma (PPARs)
s?o fatores de transcri??o, pertencentes ? fam?lia de receptores nucleares que se ligam a agonistas espec?ficos e possuem grande import?ncia no controle do processo
inflamat?rio. O objetivo deste trabalho foi realizar a caracteriza??o qu?mica do extrato do fungo Caripia montagnei, avaliar seu efeito antiinflamat?rio e antibacteriano, al?m
de verificar se este efeito acontece via PPAR. C.montagnei ? constitu?do de carboidratos (63.3 ? 0.73%), lip?deos (21.4? 0.9%) e prote?nas (2.2?0.4%). O extrato aquoso resultante do fracionamento desse fungo mostrou ser constitu?do por
carboidratos (98.7?0.9%) e prote?na (1.3?0.8%). As an?lises de espectrofotometria de infravermelho e de resson?ncia magn?tica nuclear (NMR) demonstraram que o extrato
do fungo C. montagnei ? rico em β-glucanas. Na peritonite induzida por tioglicolato, o extrato de Caripia montagnei (50 mg/Kg) conseguiu reduzir o processo inflamat?rio em
65.5? 0.9%, este valor ? superior a Wy-14643 (49.3?0.65%), PFOA (48.9?0,69%) e clofibrato (35.2?0,95%), que s?o agonistas de PPAR-α, e semelhante ao diclofenaco (81.6? 0,79). No edema plantar as glucanas de C. montagnei (50 mg/Kg) e o L-NAME apresentaram redu??o do edema de forma semelhante, 91.4?1.1% e 92,8?0.9%, respectivamente. O ?xido n?trico (NO), mediadores da inflama??o mostrou que em
todos os grupos testados houve redu??o significativa (P<0.001) dos n?veis de nitrato/nitrito quando comparados ao controle positivo. No ensaio de citotoxicidade as glucanas de C. montagnei n?o apresentaram toxicidade nas concentra??es testadas (2.5, 5.0, 10.0, 20.0 e 40.0 ug/100uL) no per?odo de 4 horas. A atividade antibacteriana (30, 90 e 150 mg/mL) revelou que n?o houve inibi??o do crescimento bacteriano. Os
resultados obtidos neste trabalho indicam que as glucanas de Caripia montagnei possuem um grande potencial de aplica??o como antiinflamat?rio. Este efeito ? mediado parcialmente por ativa??o dos PPARs e por inibi??o da COX e iNOS
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufrn.br:123456789/12524 |
| Date | 27 June 2008 |
| Creators | Queiroz, Lissandra Souza |
| Contributors | CPF:06341462468, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4783254U6&dataRevisao=null, Chavante, Suely Ferreira, CPF:33615217420, http://buscatextual.cnpq.br/buscatextual/visualizacv.do?id=K4786250T8, Souza, Giulianna Paiva Viana de Andrade, CPF:75523400378, http://lattes.cnpq.br/9747224552107070, Leite, Edda Lisboa |
| Publisher | Universidade Federal do Rio Grande do Norte, Programa de P?s-Gradua??o em Bioqu?mica, UFRN, BR, Bioqu?mica; Biologia Molecular |
| 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 |
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