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http://dx.doi.org/10.5012/bkcs.2012.33.4.1123

Prediction Models of P-Glycoprotein Substrates Using Simple 2D and 3D Descriptors by a Recursive Partitioning Approach  

Joung, Jong-Young (Bioinformatics and Molecular Design Research Center)
Kim, Hyoung-Joon (Department of Biotechnology and Translational Research Center for Protein Function Control, Yonsei University)
Kim, Hwan-Mook (College of Pharmacy, Gachon University of Medicine and Science)
Ahn, Soon-Kil (Division of Life Sciences, University of Incheon)
Nam, Ky-Youb (YOUAI Co., Ltd.)
No, Kyoung-Tai (Department of Biotechnology and Translational Research Center for Protein Function Control, Yonsei University)
Publication Information
Abstract
P-gp (P-glycoprotein) is a member of the ATP binding cassette (ABC) family of transporters. It transports many kinds of anticancer drugs out of the cell. It plays a major role as a cause of multidrug resistance (MDR). MDR function may be a cause of the failure of chemotherapy in cancer and influence pharmacokinetic properties of many drugs. Hence classification of candidate drugs as substrates or nonsubstrate of the P-gp is important in drug development. Therefore to identify whether a compound is a P-gp substrate or not, in silico method is promising. Recursive Partitioning (RP) method was explored for prediction of P-gp substrate. A set of 261 compounds, including 146 substrates and 115 nonsubstrates of P-gp, was used to training and validation. Using molecular descriptors that we can interpret their own meaning, we have established two models for prediction of P-gp substrates. In the first model, we chose only 6 descriptors which have simple physical meaning. In the training set, the overall predictability of our model is 78.95%. In case of test set, overall predictability is 69.23%. Second model with 2D and 3D descriptors shows a little better predictability (overall predictability of training set is 79.29%, test set is 79.37%), the second model with 2D and 3D descriptors shows better discriminating power than first model with only 2D descriptors. This approach will be used to reduce the number of compounds required to be run in the P-gp efflux assay.
Keywords
ADME prediction; P-Glycoprotein; Recursive partitioning; 2D Descriptors; 3D Descriptors;
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