title: Prediction of binding affinity for estrogen receptor alpha modulators using statistical learning approaches.
abstract: The estrogen receptor (ER), an important drug target for the therapy of breast cancers, received a great deal of attention during recent years. This work aimed at finding more potent and selective ER modulators through the investigations of multiple ligand-receptor interactions by exploring the relationship between the experimental and predicted pIC50 values using in silico methods. A Bayesian-regularized neural network combined with principal component analysis has been conducted on a set of ERalpha modulators (127 molecules), resulting in the correlation coefficients of 0.91 +/- 0.02, 0.87 +/- 0.04 and 0.90 +/- 0.02 for the training set (64 molecules), cross-validation set (32 molecules) and independent test (31 molecules), respectively. Meanwhile, a multiple linear regression (MLR) method has also been applied in order to explore the most important variables related to the biological activities. The proposed MLR model obtains a reasonable predictivity of pIC50 (R = 0.72, Q = 0.79) and makes use of four molecular descriptors, namely, Xvch6, nelem, SsssCH and SaaN. All these results prove the reliabilities of the in silico models, which should be useful not only for the screening but also for the rational design of novel ERalpha modulators with improved potency.
authors.affiliation: Key Lab of Mariculture and Biotechnology, Ministry of Agriculture, Dalian Fisheries University, Dalian, China. yhwang@dlfu.edu.cn
authors.forename: Yonghua
authors.initials: Y
authors.lastname: Wang
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
authors.forename: Jun
authors.initials: J
authors.lastname: Ding
authors.forename: Yuan
authors.initials: Y
authors.lastname: Wang
authors.forename: Yaqing
authors.initials: Y
authors.lastname: Chang
mesh_terms: D001499:Bayes Theorem; D003198:Computer Simulation; D020847:Estrogen Receptor Modulators / Q000737:chemistry*; D047628:Estrogen Receptor alpha / Q000737:chemistry*; D020128:Inhibitory Concentration 50; D016013:Likelihood Functions; D008956:Models, Chemical; D016571:Neural Networks, Computer; D025341:Principal Component Analysis; D021281:Quantitative Structure-Activity Relationship
chemical_list: D020847:Estrogen Receptor Modulators; D047628:Estrogen Receptor alpha