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Predicting human intestinal absorption of diverse chemicals using ensemble learning based QSAR modeling approaches.

Abstract：

:Human intestinal absorption (HIA) of the drugs administered through the oral route constitutes an important criterion for the candidate molecules. The computational approach for predicting the HIA of molecules may potentiate the screening of new drugs. In this study, ensemble learning (EL) based qualitative and quantitative structure-activity relationship (SAR) models (gradient boosted tree, GBT and bagged decision tree, BDT) have been established for the binary classification and HIA prediction of the chemicals, using the selected molecular descriptors. The structural diversity of the chemicals and the nonlinear structure in the considered data were tested by the similarity index and Brock-Dechert-Scheinkman statistics. The external predictive power of the developed SAR models was evaluated through the internal and external validation procedures recommended in the literature. All the statistical criteria parameters derived for the performance of the constructed SAR models were above their respective thresholds suggesting for their robustness for future applications. In complete data, the qualitative SAR models rendered classification accuracy of >99%, while the quantitative SAR models yielded correlation (R(2)) of >0.91 between the measured and predicted HIA values. The performances of the EL-based SAR models were also compared with the linear models (linear discriminant analysis, LDA and multiple linear regression, MLR). The GBT and BDT SAR models performed better than the LDA and MLR methods. A comparison of our models with the previously reported QSARs for HIA prediction suggested for their better performance. The results suggest for the appropriateness of the developed SAR models to reliably predict the HIA of structurally diverse chemicals and can serve as useful tools for the initial screening of the molecules in the drug development process.

journal_name

Comput Biol Chem

journal_title

Computational biology and chemistry

authors

Basant N,Gupta S,Singh KP

doi

10.1016/j.compbiolchem.2016.01.005

subject

Has Abstract

pub_date

2016-04-01 00:00:00

pages

178-96

eissn

1476-9271

issn

1476-928X

pii

S1476-9271(16)30042-1

journal_volume

pub_type

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Predicting human intestinal absorption of diverse chemicals using ensemble learning based QSAR modeling approaches.