Induction of neuritogenesis in PC12 cells by a pulsed electromagnetic field via MEK-ERK1/2 signaling

Tada Aki Kudo, Hiroyasu Kanetaka, Yoshinaka Shimizu, Toshihiko Abe, Hitoshi Mori, Kazumi Mori, Eizaburo Suzuki, Toshiyuki Takagi, Shin ichi Izumi

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

We examined the regulation of neuritogenesis by a pulsed electromagnetic field (PEMF) in rat PC12 pheochromocytoma cells, which can be induced to differentiate into neuron-like cells with elongated neurites by inducers such as nerve growth factor (NGF). Plated PC12 cells were exposed to a single PEMF (central magnetic flux density, 700 mT; frequency, 0.172 Hz) for up to 12 h per day and were then evaluated for extent of neuritogenesis or acetylcholine esterase (AChE) activity. To analyze the mechanism underlying the effect of the PEMF on the cells, its effects on intracellular signaling were examined using the ERK kinase (MEK) inhibitors PD098059 and U0126 (U0124 was used as a negative control for U0126). The number of neurite bearing PC12 cells and AChE activity increased after PEMF exposure without the addition of other inducers of neuritogenesis. Additionally, PEMF exposure induced sustained activation of ERK1/2 in PC12 cells, but not in NR8383 rat alveolar macrophages. Furthermore, U0126 strongly inhibited PEMF-dependent ERK1/2 activation and neuritogenesis. The PEMF-dependent neuritogenesis was also suppressed by PD098059, but not U0124. These results suggest that PEMF stimulation independently induced neuritogenesis and that activation of MEK-ERK1/2 signaling was induced by a cell-type-dependent mechanism required for PEMF-dependent neuritogenesis in PC12 cells.

Original languageEnglish
Pages (from-to)15-20
Number of pages6
JournalCell structure and function
Volume38
Issue number1
DOIs
Publication statusPublished - 2013

Keywords

  • ERK1/2
  • Electromagnetic field
  • Neuritogenesis
  • PC12 cells
  • PEMF

ASJC Scopus subject areas

  • Physiology
  • Molecular Biology
  • Cell Biology

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