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ISSN 2522-9028 (Print)
ISSN 2522-9036 (Online)

Fiziologichnyi Zhurnal

is a scientific journal issued by the

Bogomoletz Institute of Physiology
National Academy of Sciences of Ukraine

Editor-in-chief: V.F. Sagach

The journal was founded in 1955 as
1955 – 1977 "Fiziolohichnyi zhurnal" (ISSN 0015 – 3311)
1978 – 1993 "Fiziologicheskii zhurnal" (ISSN 0201 – 8489)
1994 – 2016 "Fiziolohichnyi zhurnal" (ISSN 0201 – 8489)
2017 – "Fiziolohichnyi zhurnal" (ISSN 2522-9028)

Fiziol. Zh. 2021; 67(1): 11-15

Mecamylamine modulates epileptiform discharges in low-Mg2+ model of epilepsy

O.S. Zapukhliak, D.S. Isaev

  1. Bogomoletz Institute of physiology NAS of Ukraine, Kyiv, Ukraine


Mecamylamine is a nonselective antagonist of nicotinic acetylcholine receptors that was developed as an antihypertensive medication and is now being studied for its beneficial effects in several pathological conditions, such as substance abuse, depression, anxiety and epilepsy. In this work, we investigate the effect of mecamylamine on the manifestations of seizure-like activity evoked by perfusion of hippocampal slices with low-Mg2+ solution of artificial cerebrospinal fluid. Reducing Mg2+ concentration in extracellular solution induced two distinct types of epileptiform activity: recurring seizure-like activity and continuous discharges. Application of mecamylamine significantly increased internal frequency of recurring seizurelike activity and significantly decreased inter-event intervals between continuous discharges. We also show that mecamylamine significantly decreased internal frequency of continuous epileptiform discharges. The results of our work show that mecamylamine exerts modulatory effect on the low-Mg2+ epileptiform activity induced in hippocampal acute rat brain slices. Additionally, obtained results indicate the role of nicotinic acetylcholine receptors in the modulation of hippocampal network activity, which might explain some of the therapeutic effects of mecamylamine in CNS.

Keywords: mecamylamine; rat brain slices; seizure-like activity; CA3 hippocampus


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