Exposure to extremely low frequency magnetic fields enhances locomotor activity via activation of dopamine D1-like receptors in mice

Eun Joo Shin, Hoon Jeong Ji, Ji Kim Hyun, Choon Gon Jang, Kiyofumi Yamada, Toshitaka Nabeshima, Hyoung Chun Kim

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We demonstrated that exposure to extremely low frequency magnetic fields (ELF-MF) enhanced dopamine levels in the rat striatum. To extend our understanding, we examined the role of dopaminergic receptors in ELF-MF-induced behavioral changes. Exposure to ELF-MF (2.4 mT, 1 h/day, for one or seven days) enhanced locomotor activity in a time-dependent manner. This hyperlocomotor activity paralleled an increase in c-Fos-like immunoreactivity (c-Fos-IR). Pretreatment with SCH23390, a dopaminergic D1-like receptor antagonist, but not with sulpiride, a dopaminergic D2-like receptor antagonist, inhibited ELF-MF-induced increased locomotor activity and c-Fos-IR. Thus, our results suggest that ELF-MF-induced behavioral responses are, at least in part, mediated by activation of dopamine D1-like receptors.

Original languageEnglish
Pages (from-to)367-371
Number of pages5
JournalJournal of Pharmacological Sciences
Issue number4
Publication statusPublished - 01-12-2007
Externally publishedYes


All Science Journal Classification (ASJC) codes

  • Molecular Medicine
  • Pharmacology

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