Abstract
The GABAergic and glutamatergic neurotransmission systems are involved in seizures and other disorders of the central nervous system (CNS). Benzofuran derivatives often serve as the core in drugs used to treat such neurological disorders. The aim of this study was to synthesize new γ-amino acids structurally related to GABA and derived from 2,3-disubstituted benzofurans, analyze in silico their potential toxicity, ADME properties, and affinity for the GluN1–GluN2A NMDA receptor, and evaluate their potential activity and neuronal mechanisms in a murine model of pentylenetetrazol (PTZ)- and 4-aminopyridine (4-AP)-induced seizures. The in silico analysis evidenced a low risk of toxicity for the test compounds as well as the probability that they can cross the blood–brain barrier (BBB) to reach their targets in the CNS. According to docking simulations, these compounds bind at the active site of the NMDA glutamate receptor with high affinity. The in vivo assays demonstrated that 4 protects against 4-AP-induced seizure episodes, suggesting negative allosteric modulation (NAMs) at the glutamatergic NMDA receptor. Contrarily, 3 (the regioisomer of 4) and its racemic derivatives (cis-2,3-dihydrobenzofurans) were previously described to exacerbate such episodes, pointing to their positive allosteric modulation (PAMs) of the same receptor.
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Acknowledgements
The authors are grateful to the Consejo Nacional de Ciencia y Tecnología (Mexico) for the scholarship to AC-Y and for the financial support given to this project (CB166271). The authors deeply appreciate the experimental support received from the UAM-Xochimilco, the Centro de Nanociencias y Micro Nanotecnología of the Instituto Politécnico Nacional and the Laboratory of Molecular Modeling, Drug Design, and Bioinformatic of the Escuela Superior de Medicina, Instituto Politécnico Nacional, Mexico, for NMR and HRMS spectra. We thank Bruce Allan Larsen for reviewing and proofreading the manuscript. In memory of Ph.D.. J. Samuel Cruz-Sánchez †.
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AC-Y, HL, RT-M, and JGT-F designed the study and experiments. AC-Y carried out the experiments. All authors analyzed the results, and contributed to the preparation, edition, and analysis of the manuscript. They have all read and approved the final version of the manuscript and give their consent for its publication.
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Coaviche-Yoval, A., Trujillo-Ferrara, J.G., Soriano-Ursúa, M.A. et al. In silico and in vivo neuropharmacological evaluation of two γ-amino acid isomers derived from 2,3-disubstituted benzofurans, as ligands of GluN1–GluN2A NMDA receptor. Amino Acids 54, 215–228 (2022). https://doi.org/10.1007/s00726-021-03108-2
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DOI: https://doi.org/10.1007/s00726-021-03108-2