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Research ArticleExperimental Studies

Effects of Subchronic Exposure to a 1439 MHz Electromagnetic Field on the Microcirculatory Parameters in Rat Brain

HIROSHI MASUDA, AKIRA USHIYAMA, SHOGO HIROTA, KANAKO WAKE, SOICHI WATANABE, YUKIO YAMANAKA, MASAO TAKI and CHIYOJI OHKUBO
In Vivo July 2007, 21 (4) 563-570;
HIROSHI MASUDA
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  • For correspondence: msd@niph.go.jp
AKIRA USHIYAMA
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SHOGO HIROTA
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KANAKO WAKE
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SOICHI WATANABE
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YUKIO YAMANAKA
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MASAO TAKI
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CHIYOJI OHKUBO
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Abstract

The aim of this study was to investigate whether repeated exposure to radio frequency electromagnetic field (RF-EMF) of 1439 MHz affects the cerebral microcirculation, including blood-brain barrier function, in a rat brain. Materials and Methods: The head of the rat was exposed for four weeks (60 min/day, 5 days/week) to RF-EMF at 2.4 W/kg of brain averaged specific absorption rate (BASAR). Three microcirculatory parameters: blood-brain barrier permeability, leukocyte behavior and plasma velocity were measured before and after RF-EMF exposure using a closed cranial window method. Results: No extravasation of intravenously injected dyes from pial venules was found at any BASAR level. No significant changes in the number of endothelial-adhering leukocytes after exposure were found. The plasma velocity remained constant within the physiological range through each exposure. Conclusion: These findings suggest that there were no effects on the cerebral microcirculation under the given RF-EMF exposure conditions.

  • Closed cranial window
  • radio-frequency
  • electromagnetic field
  • blood-brain barrier
  • leukocyte behavior
  • cerebral microcirculation
  • subchronic exposure

Footnotes

    • Received January 10, 2007.
    • Revision received March 20, 2007.
    • Accepted March 28, 2007.
    • Copyright © 2007 International Institute of Anticancer Research (Dr. John G. Delinassios), All rights reserved
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    In Vivo: 21 (4)
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    July-August 2007
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    Effects of Subchronic Exposure to a 1439 MHz Electromagnetic Field on the Microcirculatory Parameters in Rat Brain
    HIROSHI MASUDA, AKIRA USHIYAMA, SHOGO HIROTA, KANAKO WAKE, SOICHI WATANABE, YUKIO YAMANAKA, MASAO TAKI, CHIYOJI OHKUBO
    In Vivo Jul 2007, 21 (4) 563-570;

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    Effects of Subchronic Exposure to a 1439 MHz Electromagnetic Field on the Microcirculatory Parameters in Rat Brain
    HIROSHI MASUDA, AKIRA USHIYAMA, SHOGO HIROTA, KANAKO WAKE, SOICHI WATANABE, YUKIO YAMANAKA, MASAO TAKI, CHIYOJI OHKUBO
    In Vivo Jul 2007, 21 (4) 563-570;
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