Studying the anticonvulsive activity of new ligands of NDMA-receptor complex – imidazole-4,5-dicarbonic acid derivatives

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Abstract


NMDA receptors were proven to play a significant role in the processes of epileptogenesis. Experimental data indicate a significant anticonvulsant effect of NMDA receptor antagonists, but the use of the studied NMDA ligands remains limited due to their low efficiency and toxic effects. The aim of the study was to investigate the anticonvulsant effect of new ligands of the glutamate NMDA receptor complex – imidazole-4,5-dicarboxylic acid (IDA) derivatives on a model of NMDA-induced convulsions in mice. The tested agents (IEM2258 and IEM2248) were injected into the lateral ventricles of a waking mouse brain at doses of 0.1–0.5 mmol in 5 µl 15 minutes before the convulsant (NMDA). Valproic acid was used as a comparator drug. The results of the study showed that IDA derivatives exhibit anticonvulsant activity of various degrees of severity. A pronounced anticonvulsant effect was established for IEM2258 at a dose of 0.4 mmol: a significant reduction in the duration of convulsions (compared to the previous dose of the tested substance) and a total absence of NMDA-induced deaths. IEM2248 showed anticonvulsant activity at a dose of 0.2 mmol, in 100% of cases preventing fatal outcomes and completely protecting animals from the convulsions. Thus, the data obtained in this study showed dose-dependent anticonvulsant effect of new IDA derivatives (IEM2258 and IEM2248) due to the blockade of the NMDA receptor complex, that indicates the promising aspect for the development of these agents and further searching for effective and safe anticonvulsants among this pharmacological class.


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About the authors

Ekaterina E. Jakovleva

Institute of Experimental Medicine

Author for correspondence.
Email: eeiakovleva@mail.ru

Russian Federation, Saint Petersburg

PhD, Scientific Researcher of The Laboratory of Chemistry and Pharmacology of Pharmaceutical Drug of S.V. Anichkov Department of Neuropharmacology

Stanislav P. Foksha

Institute of Experimental Medicine

Email: dr.foksha@mail.ru

Russian Federation, Saint Petersburg

PhD Student, S.V. Anichkov Department of Neuropharmacology

Marija A. Brusina

Institute of Experimental Medicine

Email: mashasemen@gmail.com

Russian Federation, Saint Petersburg

PhD, Junior Scientific Researcher of The Laboratory for the synthesis and nanotechnology of drugs of S.V. Anichkov Department of Neuropharmacology

Larisa G. Kubarskaja

Institute of Experimental Medicine; Institute of Toxicology, Federal Medical and Biological Agency

Email: larkub@yandex.ru

Russian Federation, Saint Petersburg

PhD, Leading Engineer, S.V. Anichkov Department of Neuropharmacology; Senior Researcher

Levon B. Piotrovskij

Institute of Experimental Medicine

Email: piotrovsky@yandex.ru

Russian Federation, Saint Petersburg

Doctor of Biological Sciences, Professor, Head of The Laboratory for the synthesis and nanotechnology of drugs of S.V. Anichkov Department of Neuropharmacology

Eugenii R. Bychkov

Institute of Experimental Medicine; S.M. Kirov Military Medical Academy

Email: bychkov@mail.ru

Russian Federation, Saint Petersburg

PhD, Head of The Laboratory of Chemistry and Pharmacology of Pharmaceutical Drugs of S.V. Anichkov Department of Neuropharmacology; Lecturer Department of Pharmacology

Petr D. Shabanov

Institute of Experimental Medicine

Email: pdshabanov@mail.ru

Russian Federation, Saint Petersburg

Dr. Med. Sci. (Pharmacology), Professor and Head, Dept. of Neuropharmacology

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Copyright (c) 2020 Jakovleva E.E., Foksha S.P., Brusina M.A., Kubarskaja L.G., Piotrovskij L.B., Bychkov E.R., Shabanov P.D.

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