Document Detail

Molecular Features for Antitrypanosomal Activity of Thiosemicarbazones Revealed by OPS-PLS QSAR Studies.
MedLine Citation:
PMID:  22779790     Owner:  NLM     Status:  Publisher    
A quantitative structureactivity relationship analysis was employed to explore the relationship between the molecular structure of thiosemicarbazone analogues and the inhibition of the cysteine protease cruzain, a validated target for Chagas disease treatment. A data set containing 53 thiosemicarbazone derivatives was used to produce a quantitative model for activity prediction of unknown compounds. Several electronic descriptors were obtained through DFT calculations, along with a large amount of Dragon descriptors. The ordered predictor selection (OPS) algorithm was employed to select the most relevant descriptors to perform PLS regressions. With this procedure, significant correlation coefficients (r2 = 0.85, q2 = 0.78) were achieved. Furthermore, predicted values for an external test set are in good agreement with the experimental results, indicating the potential of the model for untested compounds. Additional validation tests were carried out, indicating that a robust and reliable model was obtained to be used in the design of new thiosemicarbazones with improved cruzain inhibition potential.
Norka Beatriz Huamá Lozano; Vinícius Gonçalves Maltarollo; Karen Cacilda Weber; Kathia Maria Honorio; Rafael Victorio Carvalho Guido; Adriano Defini Andricopulo; Albérico Borges Ferreira Da Silva
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-7-10
Journal Detail:
Title:  Medicinal chemistry (Shariqah (United Arab Emirates))     Volume:  -     ISSN:  1875-6638     ISO Abbreviation:  -     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-7-11     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101240303     Medline TA:  Med Chem     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Instituto de Química de São Carlos - USP, São Carlos, SP, Brazil.
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