研究のタイプ: 医学/生物学の研究 (experimental study)

[ラットの行動に対する携帯電話領域の電磁放射の影響] med./bio.

The effect of electromagnetic radiation in the mobile phone range on the behaviour of the rat.

掲載誌: Metab Brain Dis 2009; 24 (4): 629-641

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研究目的(著者による)

The authors hypothesize that exposure to electromagnetic fields early in life of rat pups will lead to abnormal brain development impacting negatively on their behaviour during adulthood. They subsequently performed behavioural, histological and biochemical tests on exposed and unexposed rats to determine the effects of electromagnetic fields on learning and memory, emotional states and corticosterone levels.

詳細情報

Rat pups and their dams were exposed to electromagnetic fields for 3 h per day from postnatal day 2 to postnatal day 14. On postnatal day 22 rat pups were divided into six males und six females per group. Behavioural assessments started on postnatal day 58. On postnatal day 62 the rats were sacrificed for the collection of plasma and brain tissue.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 840 MHz
ばく露時間: continuous for 3 hr/day from day 2 to day 14 after birth

ばく露1

主たる特性
周波数 840 MHz
タイプ
  • electromagnetic field
特性
  • far field
ばく露時間 continuous for 3 hr/day from day 2 to day 14 after birth
ばく露装置
ばく露の発生源/構造
  • signal generator + antenna
ばく露装置の詳細 antenna placed 0.9 m from the cage in a height of 2.5 m above ground; antenna directed to the side of the cage; cage equipped with plastic covering lid for exposure
Sham exposure A sham exposure was conducted.
パラメータ
測定量 種別 Method Mass 備考
電力 0.38 mW - - - transmitted power
電力 0.01 µW - 測定値および計算値 - received power
電力密度 60 µW/m² - 測定値および計算値 - at 0.93 m from the antenna
電界強度 8.95 mV/m - 測定値および計算値 - 79.04 dBµV/m

ばく露を受けた生物:

方法 影響評価項目/測定パラメータ/方法

研究対象とした生物試料:
研究対象とした臓器系:
調査の時期:
  • ばく露後

研究の主なアウトカム(著者による)

Morphological analysis of the hippocampal granular and pyramidal cells and of the cortical region revealed that the cells were intact and that there were no significant differences in neuron structure between control and exposed brains.
Although there were no significant differences in corticosterone levels between the groups, a trend was noted for exposed female rats to higher corticosterone levels compared to unexposed female controls.
The data showed that electromagnetic field exposure may cause behavioural changes as evidenced by a decrease in locomotor activity, increased grooming and freezing behaviour in exposed male rats. These a!terations in behaviour have been associated with animal models of stress-related disorders and therefore suggest that electromagnetic field exposure may be an environmental risk factor in the development of behavioural abnormalities. The authors recognise that the obtained evidence is limited, and that further investigations are required.

研究の種別:

研究助成

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