Conformational analysis of a quinolonic ribonucleoside with anti-HSV-1 activity
作者:Julliane D. Yoneda、Marcia Helena R. Velloso、Kátia Z. Leal、Rodrigo B. de V. Azeredo、Makiko Sugiura、Magaly G. Albuquerque、Fernanda da C. Santos、Maria Cecília B.V. de Souza、Anna Claudia Cunha、Peter R. Seidl、Ricardo B. de Alencastro、Vitor F. Ferreira
DOI:10.1016/j.molstruc.2010.01.044
日期:2011.1
synthesized by part of our group indicated that some of them have antiviral activity against HSV-1. The conformational analysis of bioactive compounds is extremely important in order to better understand their chemical structures and biological activity. In this work, we have carried out a nuclear relaxation NMR study of 6-Me ribonucleoside derivative in order to determine if the syn or anti conformation is preferential
Molecular design, synthesis and biological evaluation of 1,4-dihydro-4-oxoquinoline ribonucleosides as TcGAPDH inhibitors with trypanocidal activity
作者:Fabyana A. Soares、Renata Sesti-Costa、João Santana da Silva、Maria Cecília B.V. de Souza、Vitor F. Ferreira、Fernanda da C. Santos、Patricia A.U. Monteiro、Andrei Leitão、Carlos A. Montanari
DOI:10.1016/j.bmcl.2013.06.029
日期:2013.8
The 1,4-dihydro-4-oxoquinoline ribonucleoside, Neq135, is the first low micromolar trypanosomatidae inhibitor to show good ligand efficiency (0.28 kcal mol(-1) atom(-1)) and good ligand lipophilicity efficiency (0.37 kcal mol(-1) atom(-1)) when acting against Trypanosoma cruzi glyceraldehyde 3-phosphate dehydrogenase (TcGAPDH). This and other six ribonucleosides were synthesized using our in-house technology, and assayed against the GAPDH NAD(+) site using isothermal titration calorimetry (ITC). Compound Neq135 had acceptable in vitro cytotoxicity, inhibited TcGAPDH with a K-i(app) value of 16 mu M and killed the trypomastigote form of Trypanosoma cruzi Tulahuen strain with a concentration similar to that displayed by the control drug benznidazole. Neq135 is tenfold lower kinetic affinity against hGAPDH and does not kill Balb-c fibroblast nor spleen mouse cells. These results emphasize the possibility of integrating ligand- and target-based designs to uncover potent and selective TcGAPDH inhibitors that expands the opportunity for further medicinal chemistry endeavor towards NAD(+) TcGAPDH site. (C) 2013 Elsevier Ltd. All rights reserved.
Nucleoside hydrolase immobilized on magnetic particles as a tool for onflow screening and characterization of inhibitors
作者:Pamella Christina Ortega de Oliveira、Millena Santana Ceroullo、Mayane Barbosa dos Santos、Pedro Rodrigues Coelho Medeiros、Bruno Clemente Brandão Marques、Luzineide Wanderley Tinoco、Maria Cecília Bastos Vieira de Souza、Fernanda da Costa Santos Boechat、Marcela Cristina de Moraes
DOI:10.1016/j.jpba.2023.115589
日期:2023.10
immobilized enzyme reactor (IMER). For an automated assay, the LdNH-MP-IMER was connected in-line to an analytical column in an HPLC-DAD system to monitor the enzyme activity through quantification of the product hypoxanthine. Kinetic studies provided a KM value of 2079 ± 87 µmol.L−1 for the inosine substrate. Validation of the LdNH-MP-IMER for onflow screening purposes was performed with a library containing