Nashrieh Shimi va Mohandesi Shimi Iran

Nashrieh Shimi va Mohandesi Shimi Iran

Three-Dimensional Quantitative Structure-Activity Relationship Studies Using CoMFA and CoMSIA Methods on a Series of mGlu1 Positive Allosteric Regulating Compounds as Anti-Schizophrenic Agents

Document Type : Research Article

Authors
1 Department of Chemistry, Faculty of Basic Sciences, Mohaghegh Ardabili University, Ardabil, I.R. IRAN
2 Department of Chemistry, Faculty of Basic Sciences, Payame Noor University of Ardabil, Ardabil, I.R. IRAN
Abstract
The aim of the present study is to develop a three-dimensional quantitative structure-activity relationship (3D-QSAR) model with high predictive capability for a set of positive allosteric modulators of mGlu1 receptors, which act as anti-schizophrenic compounds. Computational modeling was based on comparative molecular field analysis (CoMFA), CoMFA-focused, and comparative molecular similarity indices analysis (CoMSIA) methods. The dataset consisting of 91 molecules was divided into training and test sets, and they were aligned based on the most active compound. The constructed and optimized models using the partial least squares (PLS) approach yielded satisfactory results. External predictability of the models was assessed by Leave-One-Out or Cross-Validation techniques, resulting in q2 values of 0.631, 0.653, and 0.594 for CoMFA, CoMFA- focused, and CoMSIA models, respectively. The statistical parameters obtained from the constructed models indicate the reliability of the models. Additionally, the 3D contours derived from the modeling process serve as a useful guide for designing more active compounds. Using the results of CoMFA- focused modeling, six new compounds were designed, and their pEC50 values were predicted. The designed compounds exhibited pEC50 values in the range of 8.28 to 8.58, indicating an increase in their biological activity compared to the reference compound.
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