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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|