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Influence of alternating low frequency magnetic fields on reactivity of central dopamine receptors in neonatal 6‐hydroxydopamine treated rats
Author(s) -
Sieroń Aleksander,
Brus Ryszard,
Szkilnik Ryszard,
Plech Andrzej,
Kubański Norbert,
Cieślar Grzegorz
Publication year - 2001
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.76
Subject(s) - dopamine , catalepsy , endocrinology , medicine , dopaminergic , dopamine receptor , agonist , quinpirole , chemistry , dopamine agonist , receptor , haloperidol
The aim of this study was to evaluate the influence of extremely low frequency magnetic field (ELF MF) on the reactivity of the central dopamine D 1 receptor in rats with dopamine neurons chemically damaged by 6‐hydroxydopamine (6‐OHDA), an animal model of human's Parkinson's disease. The experiment was carried out on male Wistar rats. On day 3 of postnatal life, a lasting and selective chemical damage of the central dopamine system was induced in the rats by infusion of 6‐OHDA HBr (133.4 μg intracerebroventricular, base form) given bilaterally into lateral ventricles of the brain. Control animals received similar treatments injecting only vehicle. At 2 months of age, both 6‐OHDA treated and control rats were randomly divided into two groups. Rats from the first group were exposed to 10 Hz sinusoidal, 1.8–3.8 mT magnetic field one hour daily for 14 days. Rats of the second group were sham exposed, with the applicator solenoid turned off. On the day after the final exposure the evaluations were made of the rat's spontaneous irritability, oral activity, and catalepsy. The MF exposed rat with chemically induced dopamine neurons damage exhibited a reduction of irritability and oral activity when stimulated with SKF 38393 (the agonist of central dopamine D 1 receptor) and some increase of catalepsy after administration of SCH 23390(the antagonist of central dopamine D 1 receptor). These results indicate that ELF MF reduce the reactivity of central dopamine D 1 receptors in rats. Bioelectromagnetics 22:479–486, 2001. © 2001 Wiley‐Liss, Inc.