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Cao L, Zhu P, Zhao Y, Zhao J. Using machine learning and quantum chemistry descriptors to predict the toxicity of ionic liquids. JOURNAL OF HAZARDOUS MATERIALS 2018; 352:17-26. [PMID: 29567407 DOI: 10.1016/j.jhazmat.2018.03.025] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 03/02/2018] [Accepted: 03/14/2018] [Indexed: 06/08/2023]
Abstract
Large-scale application of ionic liquids (ILs) hinges on the advancement of designable and eco-friendly nature. Research of the potential toxicity of ILs towards different organisms and trophic levels is insufficient. Quantitative structure-activity relationships (QSAR) model is applied to evaluate the toxicity of ILs towards the leukemia rat cell line (ICP-81). The structures of 57 cations and 21 anions were optimized by quantum chemistry. The electrostatic potential surface area (SEP) and charge distribution area (Sσ-profile) descriptors are calculated and used to predict the toxicity of ILs. The performance and predictive aptitude of extreme learning machine (ELM) model are analyzed and compared with those of multiple linear regression (MLR) and support vector machine (SVM) models. The highest R2 and the lowest AARD% and RMSE of the training set, test set and total set for the ELM are observed, which validates the superior performance of the ELM than that of obtained by the MLR and SVM. The applicability domain of the model is assessed by the Williams plot.
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Affiliation(s)
- Lingdi Cao
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstr. 3, 91058, Erlangen, Germany
| | - Peng Zhu
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Chemical Engineering, University of California, Santa Barbara, CA, 93106-5080, USA
| | - Yongsheng Zhao
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Chemical Engineering, University of California, Santa Barbara, CA, 93106-5080, USA.
| | - Jihong Zhao
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou, Henan, 450001, China; Xuchang University, Xuchang, Henan, 461001, China.
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Golmohammadi H, Dashtbozorgi Z, Khooshechin S. Modeling and predicting the solute polarity parameter in reversed-phase liquid chromatography using quantitative structure-property relationship approaches. J Sep Sci 2017; 40:4495-4502. [DOI: 10.1002/jssc.201700603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/13/2017] [Accepted: 09/14/2017] [Indexed: 11/07/2022]
Affiliation(s)
- Hassan Golmohammadi
- Young Researchers and Elite Club, Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch; Islamic Azad University; Tehran Iran
| | - Zahra Dashtbozorgi
- Young Researchers and Elite Club, Central Tehran Branch; Islamic Azad University; Tehran Iran
| | - Sajad Khooshechin
- Young Researchers and Elite Club, Central Tehran Branch; Islamic Azad University; Tehran Iran
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Ding F, Yang X, Chen G, Liu J, Shi L, Chen J. Development of bovine serum albumin-water partition coefficients predictive models for ionogenic organic chemicals based on chemical form adjusted descriptors. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 144:131-137. [PMID: 28609662 DOI: 10.1016/j.ecoenv.2017.06.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/21/2017] [Accepted: 06/02/2017] [Indexed: 06/07/2023]
Abstract
The partition coefficients between bovine serum albumin (BSA) and water (KBSA/w) for ionogenic organic chemicals (IOCs) were different greatly from those of neutral organic chemicals (NOCs). For NOCs, several excellent models were developed to predict their logKBSA/w. However, it was found that the conventional descriptors are inappropriate for modeling logKBSA/w of IOCs. Thus, alternative approaches are urgently needed to develop predictive models for KBSA/w of IOCs. In this study, molecular descriptors that can be used to characterize the ionization effects (e.g. chemical form adjusted descriptors) were calculated and used to develop predictive models for logKBSA/w of IOCs. The models developed had high goodness-of-fit, robustness, and predictive ability. The predictor variables selected to construct the models included the chemical form adjusted averages of the negative potentials on the molecular surface (Vs-adj-), the chemical form adjusted molecular dipole moment (dipolemomentadj), the logarithm of the n-octanol/water distribution coefficient (logD). As these molecular descriptors can be calculated from their molecular structures directly, the developed model can be easily used to fill the logKBSA/w data gap for other IOCs within the applicability domain. Furthermore, the chemical form adjusted descriptors calculated in this study also could be used to construct predictive models on other endpoints of IOCs.
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Affiliation(s)
- Feng Ding
- College of Chemistry and Molecule Engineering, Nanjing Tech University, Nanjing 210009, China; Nanjing Institute of Environmental Science, Ministry of Environmental Protection, Nanjing 210042, China
| | - Xianhai Yang
- Nanjing Institute of Environmental Science, Ministry of Environmental Protection, Nanjing 210042, China.
| | - Guosong Chen
- College of Chemistry and Molecule Engineering, Nanjing Tech University, Nanjing 210009, China.
| | - Jining Liu
- Nanjing Institute of Environmental Science, Ministry of Environmental Protection, Nanjing 210042, China
| | - Lili Shi
- Nanjing Institute of Environmental Science, Ministry of Environmental Protection, Nanjing 210042, China
| | - Jingwen Chen
- Key Laboratory of Industrial Ecology and Environmental Engineering (Ministry of Education), School of Environmental Science and Technology, Dalian University of Technology, Dalian 116024, China
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Ma G, Yuan Q, Yu H, Lin H, Chen J, Hong H. Development and evaluation of predictive model for bovine serum albumin-water partition coefficients of neutral organic chemicals. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 138:92-97. [PMID: 28013161 DOI: 10.1016/j.ecoenv.2016.12.022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2016] [Revised: 11/13/2016] [Accepted: 12/16/2016] [Indexed: 06/06/2023]
Abstract
The binding of organic chemicals to serum albumin can significantly reduce their unbound concentration in blood and affect their biological reactions. In this study, we developed a new QSAR model for bovine serum albumin (BSA) - water partition coefficients (KBSA/W) of neutral organic chemicals with large structural variance, logKBSA/W values covering 3.5 orders of magnitude (1.19-4.76). All chemical geometries were optimized by semi-empirical PM6 algorithm. Several quantum chemical parameters that reflect various intermolecular interactions as well as hydrophobicity were selected to develop QSAR model. The result indicates the regression model derived from logKow, the most positive net atomic charges on an atom, Connolly solvent excluded volume, polarizability, and Abraham acidity could explain the partitioning mechanism of organic chemicals between BSA and water. The simulated external validation and cross validation verifies the developed model has good statistical robustness and predictive ability, thus can be used to estimate the logKBSA/W values for chemicals in application domain, accordingly to provide basic data for the toxicity assessment of the chemicals.
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Affiliation(s)
- Guangcai Ma
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Avenue 688, 321004, Jinhua, PR China
| | - Quan Yuan
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Avenue 688, 321004, Jinhua, PR China
| | - Haiying Yu
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Avenue 688, 321004, Jinhua, PR China.
| | - Hongjun Lin
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Avenue 688, 321004, Jinhua, PR China
| | - Jianrong Chen
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Avenue 688, 321004, Jinhua, PR China
| | - Huachang Hong
- College of Geography and Environmental Sciences, Zhejiang Normal University, Yingbin Avenue 688, 321004, Jinhua, PR China
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Golmohammadi H, Dashtbozorgi Z. QSPR studies for predicting polarity parameter of organic compounds in methanol using support vector machine and enhanced replacement method. SAR AND QSAR IN ENVIRONMENTAL RESEARCH 2016; 27:977-997. [PMID: 27658742 DOI: 10.1080/1062936x.2016.1233138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Accepted: 09/02/2016] [Indexed: 06/06/2023]
Abstract
In the present work, enhanced replacement method (ERM) and support vector machine (SVM) were used for quantitative structure-property relationship (QSPR) studies of polarity parameter (p) of various organic compounds in methanol in reversed phase liquid chromatography based on molecular descriptors calculated from the optimized structures. Diverse kinds of molecular descriptors were calculated to encode the molecular structures of compounds, such as geometric, thermodynamic, electrostatic and quantum mechanical descriptors. The variable selection method of ERM was employed to select an optimum subset of descriptors. The five descriptors selected using ERM were used as inputs of SVM to predict the polarity parameter of organic compounds in methanol. The coefficient of determination, r2, between experimental and predicted polarity parameters for the prediction set by ERM and SVM were 0.952 and 0.982, respectively. Acceptable results specified that the ERM approach is a very effective method for variable selection and the predictive aptitude of the SVM model is superior to those obtained by ERM. The obtained results demonstrate that SVM can be used as a substitute influential modeling tool for QSPR studies.
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Affiliation(s)
- H Golmohammadi
- a Young Researchers and Elite Club , Yadegar-e-Imam Khomeini (RAH) Shahr-e-Rey Branch, Islamic Azad University , Tehran , Iran
| | - Z Dashtbozorgi
- b Young Researchers and Elite Club, Central Tehran Branch , Islamic Azad University , Tehran , Iran
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Golmohammadi H, Dashtbozorgi Z. Prediction of solvation enthalpy of gaseous organic compounds in propanol. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2016. [DOI: 10.1134/s0036024416090119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Chen M, Yang X, Lai X, Gao Y. 2D and 3D QSAR models for identifying diphenylpyridylethanamine based inhibitors against cholesteryl ester transfer protein. Bioorg Med Chem Lett 2015; 25:4487-95. [PMID: 26346366 DOI: 10.1016/j.bmcl.2015.08.080] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2015] [Revised: 08/18/2015] [Accepted: 08/28/2015] [Indexed: 11/18/2022]
Abstract
Cholesteryl ester transfer protein (CETP) inhibitors hold promise as new agents against coronary heart disease. Molecular modeling techniques such as 2D-QSAR and 3D-QSAR analysis were applied to establish models to distinguish potent and weak CETP inhibitors. 2D and 3D QSAR models-based a series of diphenylpyridylethanamine (DPPE) derivatives (newly identified as CETP inhibitors) were then performed to elucidate structural and physicochemical requirements for higher CETP inhibitory activity. The linear and spline 2D-QSAR models were developed through multiple linear regression (MLR) and support vector machine (SVM) methods. The best 2D-QSAR model obtained by SVM gave a high predictive ability (R(2)train=0.929, R(2)test=0.826, Q(2)LOO=0.780). Also, the 2D-QSAR models uncovered that SlogP_VSA0, E_sol and Vsurf_DW23 were important features in defining activity. In addition, the best 3D-QSAR model presented higher predictive ability (R(2)train=0.958, R(2)test=0.852, Q(2)LOO=0.734) based on comparative molecular field analysis (CoMFA). Meanwhile, the derived contour maps from 3D-QSAR model revealed the significant structural features (steric and electronic effects) required for improving CETP inhibitory activity. Consequently, twelve newly designed DPPE derivatives were proposed to be robust and potent CETP inhibitors. Overall, these derived models may help to design novel DPPE derivatives with better CETP inhibitory activity.
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Affiliation(s)
- Meimei Chen
- College of Traditional Chinese Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, Fujian, China.
| | - Xuemei Yang
- College of Traditional Chinese Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, Fujian, China
| | - Xinmei Lai
- College of Traditional Chinese Medicine, Fujian University of Traditional Chinese Medicine, Fuzhou 350122, Fujian, China
| | - Yuxing Gao
- College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian, China
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Prediction of gas-to-ionic liquid partition coefficient of organic solutes dissolved in 1-(2-methoxyethyl)-1-methylpyrrolidinium tris(pentafluoroethyl)trifluorophosphate using QSPR approaches. J Mol Liq 2015. [DOI: 10.1016/j.molliq.2014.11.025] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Khooshechin S, Dashtbozorgi Z, Golmohammadi H, Acree WE. QSPR prediction of gas-to-ionic liquid partition coefficient of organic solutes dissolved in 1-(2-hydroxyethyl)-1-methylimidazolium tris(pentafluoroethyl)trifluorophosphate using the replacement method and support vector regression. J Mol Liq 2014. [DOI: 10.1016/j.molliq.2014.03.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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