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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

In vitro metabolism of the lignan (-)-grandisin, an anticancer drug candidate, by human liver microsomes

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Barth, Thiago [1, 2] ; Habenschus, Maisa Daniela [3] ; Moreira, Fernanda Lima [4] ; Ferreira, Leandro De Santis [5] ; Lopes, Norberto Peporine [1] ; Moraes de Oliveira, Anderson Rodrigo [3]
Total Authors: 6
[1] Univ Sao Paulo, Nucleo Pesquisa Prod Nat & Sintet, Fac Ciencias Farmaceut Ribeirao Preto, BR-14040903 Ribeirao Preto, SP - Brazil
[2] Univ Fed Rio de Janeiro, Curso Farm, BR-27930560 Macae, RJ - Brazil
[3] Univ Sao Paulo, Fac Filosofia Ciencias & Letras Ribeirao Preto, Dept Quim, BR-14040901 Ribeirao Preto, SP - Brazil
[4] Univ Sao Paulo, Fac Ciencias Farmaceut Ribeirao Preto, BR-14040903 Ribeirao Preto, SP - Brazil
[5] Lychnoflora Pesquisa & Desenvolvimento Prod Nat L, BR-14030090 Ribeirao Preto, SP - Brazil
Total Affiliations: 5
Document type: Journal article
Source: DRUG TESTING AND ANALYSIS; v. 7, n. 9, p. 780-786, SEP 2015.
Web of Science Citations: 6

(-)-grandisin is a tetrahydrofuran lignan that displays important biological properties, such as trypanocidal, anti-inflammatory, cytotoxic, and antitumor activities, suggesting its utility as a potential drug candidate. One important step in drug development is metabolic characterization and metabolite identification. To perform a biotransformation study of (-)-grandisin and to determine its kinetic properties in humans, a high performance liquid chromatography (HPLC) method was developed and validated. After HPLC method validation, the kinetic properties of (-)-grandisin were determined. (-)-grandisin metabolism obeyed Michaelis-Menten kinetics. The maximal reaction rate (V-max) was 3.96 +/- 0.18 mu mol/mg protein/h, and the Michaelis-Menten constant (K-m) was 8.23 +/- 0.99M. In addition, the structures of the metabolites derived from (-)-grandisin were characterized via gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-mass spectrometry (LC-MS) analysis. Four metabolites, 4-O-demethylgrandisin, 3-O-demethylgrandisin, 4,4-di-O-demethylgrandisin, and a metabolite that may correspond to either 3,4-di-O-demethylgrandisin or 3,5-di-O-demethylgrandisin, were detected. CYP2C9 isoform was the main responsible for the formation of the metabolites. These metabolites have not been previously described, demonstrating the necessity of assessing (-)-grandisin metabolism using human-derived materials. Copyright (c) 2015 John Wiley \& Sons, Ltd. (AU)

FAPESP's process: 09/51812-0 - Development of a platform for the study of in vitro and in vivo metabolism of natural products, a need for pre-clinical testing system
Grantee:Norberto Peporine Lopes
Support type: BIOTA-FAPESP Program - Thematic Grants
FAPESP's process: 13/17658-9 - Development and validation of chromatographic and electrophoretic methods for subsequent application in studies of in vitro metabolism and biotransformation - phase 2
Grantee:Anderson Rodrigo Moraes de Oliveira
Support type: Regular Research Grants