A novel non-stochastic quadratic fingerprints-based approach for the 'in silico' discovery of new antitrypanosomal compounds.
A non-stochastic quadratic fingerprints-based approach is introduced to classify and design, in a rational way, new antitrypanosomal compounds. A data set of 153 organic chemicals, 62 with antitrypanosomal activity and 91 having other clinical uses, was processed by a k-means cluster analysis to design training and predicting data sets. Afterwards, a linear classification function was derived allowing the discrimination between active and inactive compounds. The model classifies correctly more than 93% of chemicals in both training and external prediction groups. The predictability of this discriminant function was also assessed by a leave-group-out experiment, in which 10% of the compounds were removed at random at each time and their activity predicted a posteriori. In addition, a comparison with models generated using four well-known families of 2D molecular descriptors was carried out. As an experiment of virtual lead generation, the present TOMOCOMD approach was finally satisfactorily applied on the virtual evaluation of 10 already synthesized compounds. The in vitro antitrypanosomal activity of this series against epimastigotes forms of Trypanosomal cruzi was assayed. The model was able to predict correctly the behaviour of these compounds in 90% of the cases.
Montero-Torres
Alina
A
Department of Synthesis and Drug Design, Chemical Bioactive Center, Central University of Las Villas, Santa Clara 54830, Villa Clara, Cuba. amontero@uclv.edu.cu
Vega
María Celeste
MC
Marrero-Ponce
Yovani
Y
Rolón
Miriam
M
Gómez-Barrio
Alicia
A
Escario
José Antonio
JA
Arán
Vicente J
VJ
Martínez-Fernández
Antonio R
AR
Meneses-Marcel
Alfredo
A
D000818:Animals; D016000:Cluster Analysis; D019295:Computational Biology / Q000379:methods*; D003198:Computer Simulation; D016002:Discriminant Analysis; D015195:Drug Design; D021261:Parasitic Sensitivity Tests; D014344:Trypanocidal Agents / Q000737:chemistry* / Q000145:classification; D014349:Trypanosoma cruzi / Q000187:drug effects
D014344:Trypanocidal Agents