MIA-QSAR modelling of activities of a series of AZT analogues: bi- and multilinear PLS regression

Abstract

The activities of a series of azidothymidine derivatives, compounds with anti-HIV potency, were computationally modelled using multivariate image analysis applied to quantitative structure–activity relationships (MIA-QSAR). Two regression methods were tested in order to find the best correlation between actual and predicted activities: bilinear (traditional) partial least squares (PLS), applied to the unfolded dataset, and multilinear PLS (N-PLS), applied to the three-way array. The predictive abilities of the PLS- and N-PLS-based models were found to be nearly equivalent, and both the methods derived QSAR models that are statistically superior to conventional QSAR, in which physicochemical descriptors and multiple linear regression were applied.

Keywords:

• MIA-QSAR
• AZT analogues
• HIV
• PLS
• N-PLS

Acknowledgements

CNPq is gratefully acknowledged for the fellowship (to M.P.F.), and FAPEMIG of Brazil and the Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) of Argentina for the financial support.