[Electric activity of the brain at early and late clinical stages of experimental modeling of Parkinson's disease, an impact of hemantane].

Abstract

Abstract: S.

Objective: To study an influence of the adamantane derivative hemantane on the electrical activity of the brain structures of mice at the early and late (severe) stages of experimental modeling of Parkinson's disease (PD).

Material and methods: For experimental modeling of PD in C57BL/6J mice, 30 male C57BL/6J mice weighing 25-32 g were systemically (intraperitoneally) administered proneurotoxin MPTP in two modes corresponding to different clinical stages of the disease: 1-methyl-4-phenyl-1.2.3.6-tetrahydropyridine (MPTP) at a dose of 12 mg/kg, 4 times and 20 mg/kg, 4 times with an interval of 2 hours, respectively.

Results: At the early and late clinical stages of experimental modeling of PD in the brain structures of mice (sensorimotor cortex, substantia nigra, caudate nucleus), EEG desynchronization, an increase in wave amplitude, and an increase in the power spectrum in the range of delta frequencies and beta frequencies are observed at the late symptomatic stage experimental model of PD along with a decrease in electrical activity in the range of 4-12 Hz. Preliminary application of the adamantane derivative hemantane at a dose of 20 mg/kg, both in the early and late clinical stages of PD, prevented an excessive increase in the amplitudes of all groups of waves, normalized theta activity in the range of 4-12 Hz, reduced pathological slowing and dysregulation activity in the ranges delta and beta waves, with the prevalence of these effects in the substantia nigra of the brain of animals.

Conclusion: The effect of hemantane is more pronounced at the early clinical stage of experimental modeling of PD than at the later (full-scale) stage.