1. The Targeted Pesticides as Acetylcholinesterase Inhibitors: Comprehensive Cross-Organism Molecular Modelling Studies Performed to Anticipate the Pharmacology of Harmfulness to Humans In Vitro.
- Author
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Mladenović M, Arsić BB, Stanković N, Mihović N, Ragno R, Regan A, Milićević JS, Trtić-Petrović TM, and Micić R
- Subjects
- Acetylcholinesterase chemistry, Animals, Humans, Kinetics, Molecular Conformation, Molecular Docking Simulation, Molecular Dynamics Simulation, Molecular Structure, Quantitative Structure-Activity Relationship, Solutions, Structure-Activity Relationship, Cholinesterase Inhibitors chemistry, Cholinesterase Inhibitors pharmacology, Pesticides chemistry, Pesticides pharmacology
- Abstract
Commercially available pesticides were examined as Mus musculus and Homo sapiens acetylcholinesterase ( m AChE and h AChE) inhibitors by means of ligand-based (LB) and structure-based (SB) in silico approaches. Initially, the crystal structures of simazine, monocrotophos, dimethoate, and acetamiprid were reproduced using various force fields. Subsequently, LB alignment rules were assessed and applied to determine the inter synaptic conformations of atrazine, propazine, carbofuran, carbaryl, tebufenozide, imidacloprid, diuron, monuron, and linuron. Afterwards, molecular docking and dynamics SB studies were performed on either m AChE or h AChE, to predict the listed pesticides' binding modes. Calculated energies of global minima ( E
glob_min ) and free energies of binding (∆ Gbinding ) were correlated with the pesticides' acute toxicities (i.e . , the LD50 values) against mice, as well to generate the model that could predict the LD50 s against humans. Although for most of the pesticides the low Eglob_min correlates with the high acute toxicity, it is the ∆ Gbinding that conditions the LD50 values for all the evaluated pesticides. Derived pLD50 = f (∆ Gbinding ) m AChE model may predict the pLD50 against h AChE, too. The h AChE inhibition by atrazine, propazine, and simazine (the most toxic pesticides) was elucidated by SB quantum mechanics (QM) DFT mechanistic and concentration-dependent kinetic studies, enriching the knowledge for design of less toxic pesticides.- Published
- 2018
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