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Type: Journal article
Title: Microglial activation as a measure of stress in mouse brains exposed acutely (60 minutes) and long-term (2 years) to mobile telephone radiofrequency fields
Author: Finnie, J.
Cai, Z.
Manavis, J.
Helps, S.
Blumbergs, P.
Citation: Pathology, 2010; 42(2):151-154
Publisher: Taylor & Francis
Issue Date: 2010
ISSN: 0031-3025
Statement of
John W. Finnie‌, Zhao Cai‌, Jim Manavis‌, Stephen Helps‌, Peter C. Blumbergs‌
Abstract: Aim: To determine whether acute or long-term exposure of the brain to mobile telephone radiofrequency (RF) fields produces activation of microglia, which normally respond rapidly to any change in their microenvironment. Methods: Using a purpose designed exposure system at 900 MHz, mice were given a single, far-field whole body exposure at a specific absorption rate (SAR) of 4 W/kg for 60min (acute) or on five successive days per week for 104 weeks (long-term). Control mice were sham-exposed or freely mobile in a cage to control for any stress caused by immobilisation in the exposure module. Positive control brains subjected to a stab wound were also included to confirm the ability of microglia to react to any neural stress. Brains were perfusion-fixed with 4% paraformaldehyde and representative regions of the cerebral cortex and hippocampus immunostained for ionised calcium binding adaptor molecule (Iba1), a specific microglial marker. Results: There was no increase in microglial Iba1 expression in brains short or long-term exposed to mobile telephony microwaves compared to control (sham-exposed or freely moving caged mice) brains, while substantial microglial activation occurred in damaged positive control neural tissue. Conclusion: Acute (60minutes) or longer duration (2 years) exposure of murine brains to mobile telephone RF fields did not produce any microglial activation detectable by Iba1 immunostaining.
Keywords: Mobile telephony; brain; microglial activation
Rights: © 2010 Royal College of Pathologists of Australasia
RMID: 0020100193
DOI: 10.3109/00313020903494086
Appears in Collections:Pathology publications

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