General Physiology and Biophysics Vol.28, No.4, p.420

General Physiology and Biophysics Vol.28, No.4, p.420–424, 2009

Founded: 1982
ISSN 1338-4325 (online)
ISSN 0231-5882 (print)
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General Physiology and Biophysics Vol.28, No.4, p.420–424, 2009
Title: Extremely low frequency magnetic field exposure affects DnaK and GroEL expression in E. coli cells with impaired heat shock response
Author: Brunella Del Re, Pamela Marcantonio, Ferdinando Bersani, and Gianfranco Giorgi

Abstract: In our earlier experiments, we found that extremely low frequency magnetic fields (ELF-MF) affect heat shock protein (HSP) expression in wild type Escherichia coli cells. In the present work we investigate the ability of ELF-MF exposure to trigger an increase of DnaK and GroEL protein levels also in E. coli cells not exhibiting the classic heat shock response (HSR) when subjected to a 42°C heat stress. We find that these cells, although lacking a HSR to heat shock treatment, show an enhancement of DnaK and GroEL protein levels after 30 or 90 min sinusoidal ELF-MF exposure (50 Hz, 1 mT). This result suggests that the HSP induction pathway triggered by ELF-MF exposure could be different from that elicited by heat shock treatment.

Keywords: Escherichia coli — Heat shock protein — Transposition — Extremely low frequency magnetic field — Sinusoidal magnetic field

Year: 2009, Volume: 28, Issue: 4	Page From: 420, Page To: 424
doi:10.4149/gpb_2009_04_420
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