We have studied the non-thermal effects of radiofrequency (RF) electromagnetic fields (EMFs) on Ba2+ currents (IBa2+) through voltage-gated calcium channels (VGCC), recorded in primary cultures of rat cortical neurons using the patch-clamp technique. To assess whether lowlevel acute RF field exposure could modify the amplitude and/or the voltage-dependence of IBa2+, Petri dishes containing cultured neurons were exposed for 1-3 periods of 90 s to 900 MHz RFEMF continuous wave (CW) or amplitude-modulated according to global system mobile communication standard (GSM) during whole-cell recording. The specific absorption rates (SARs) were 2 W/kg for CW, and 2 W/kg (time average value) for GSM-modulated signals, respectively. The results obtained indicate that single or multiple acute exposures to either CW or GSM-modulated 900 MHz RF-EMFs do not significantly alter the current amplitude or the current-voltage relationship of IBa2+, through VGCC.

Acute exposure to low-level CW and GSM-modulated 900 MHz radiofrequency does not affect Ba(2+) currents through voltage-gated calcium channels in rat cortical neurons.

PLATANO, DANIELA;MESIRCA, PIETRO;BERSANI, FERDINANDO;AICARDI, GIORGIO
2007

Abstract

We have studied the non-thermal effects of radiofrequency (RF) electromagnetic fields (EMFs) on Ba2+ currents (IBa2+) through voltage-gated calcium channels (VGCC), recorded in primary cultures of rat cortical neurons using the patch-clamp technique. To assess whether lowlevel acute RF field exposure could modify the amplitude and/or the voltage-dependence of IBa2+, Petri dishes containing cultured neurons were exposed for 1-3 periods of 90 s to 900 MHz RFEMF continuous wave (CW) or amplitude-modulated according to global system mobile communication standard (GSM) during whole-cell recording. The specific absorption rates (SARs) were 2 W/kg for CW, and 2 W/kg (time average value) for GSM-modulated signals, respectively. The results obtained indicate that single or multiple acute exposures to either CW or GSM-modulated 900 MHz RF-EMFs do not significantly alter the current amplitude or the current-voltage relationship of IBa2+, through VGCC.
BIOELECTROMAGNETICS
D. Platano; P. Mesirca; A. Paffi; M. Pellegrino; M. Liberti; F. Apollonio; F. Bersani; G. Aicardi.
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11585/49759
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