Isolation of Tiliroside from Spiranthera odoratissima as Inhibitor of Trypanosoma cruzi Glyceraldehyde-3-phosphate Dehydrogenase by Using Bioactivity-Guided Fractionation

Autor(es)

Cornelio, Vivian E. ; Maluf, Fernando V. ; Fernandes, Joao B. ; da Silva, Maria Fatima G. F. ; Oliva, Glaucius ; Guido, Rafael V. C. ; Vieira, Paulo C.

• Tipo de documento: Artigo Científico
• Fonte: Journal of the Brazilian Chemical Society; v. 28, n. 3, SI, p. 512-519, MAR 2017.
• Citações Web of Science: 7

Resumo

Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a key enzyme involved in the Trypanosoma cruzi glycolytic pathway, parasite that causes Chagas' disease. There are only few drugs available to treat this disease, most of which present strong side effects. Natural products constitute a prime source for the discovery of new scaffolds potentially useful for the treatment of several diseases, including Chagas' disease. Bioactivity-guided fractionation of Spiranthera odoratissima extract using T. cruzi GAPDH (TcGAPDH) as a target led to the isolation of the flavonoid tiliroside (kaempferol-3-O-beta-D-(6''-trans-p-coumaroyl)-glucopyranoside), identified as an excelent inhibitor of this enzyme and for the first time reported for this plant species. Mechanistic studies of tiliroside showed that it is a reversible non-competitive inhibitor of TcGAPDH. In additon, molecular modeling analysis indicated the binding mode of tiliroside to TcGAPDH. Therefore, the identification of tiliroside as TcGPADH inhibitor in a complex matrix such as the plant crude extract and the discovery of a new binding site may contribute to the opening of new paths in the search for natural product inhibitors of this enzyme. (AU)

• Processo FAPESP: 09/17538-8 - Estudo de novas metodologias para realização de ensaios com a catepsina D na busca de inibidores
• Beneficiário: Vivian Estevam Cornélio
• Modalidade de apoio: Bolsas no Brasil - Doutorado Direto
• Processo FAPESP: 13/07600-3 - CIBFar - Centro de Inovação em Biodiversidade e Fármacos
• Beneficiário: Glaucius Oliva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs