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

[電磁界にばく露した後のラットの生殖器官に対する生物学的および形態学的影響] med./bio.

Biological and morphological effects on the reproductive organ of rats after exposure to electromagnetic field.

掲載誌: Saudi Med J 2005; 26 (3): 405-410

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研究目的(著者による)

To study the biological and morphological effects of 900 MHz radiofrequency electromagnetic fields on rat testis.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 900 MHz
Modulation type: CW
ばく露時間: repeated daily exposure, 30 min/day, 5 days/week for 4 weeks

ばく露1

主たる特性
周波数 900 MHz
タイプ
  • electromagnetic field
特性
  • near field
ばく露時間 repeated daily exposure, 30 min/day, 5 days/week for 4 weeks
Modulation
Modulation type CW
ばく露装置
ばく露の発生源/構造
チャンバの詳細 The exposure system consisted of a ventilated plastic tube cage (12 cm long, 5.5 cm in diameter) and a dipole antenna.
ばく露装置の詳細 The whole body of the rat was positioned in close contact above the dipole antenna.
Additional information Controls rats were fed under the same environmental conditions as the exposure group.
パラメータ
測定量 種別 Method Mass 備考
電力 2 W peak - - -
電力密度 1 mW/cm² mean 測定値 - ? 0.4 mW/cm?

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)

The weight of testis, testicular biopsy score count (Johnson score) and the percentage of interstitial tissue to the entire testicular tissue were not significantly different in the exposed group compared to the control group. However, the diameter of the seminiferous tubules and the mean height of the germinal epithelium were significantly decreased in exposed animals. There was a significant decrease in serum total testosterone level in exposed rats, but there was an insignificant decrease in plasma luteinizing hormone and follicle stimulating hormone levels in the exposed group compared to the control group.
The authors concluded that the biological and morphological effects resulting from 900 MHz radiofrequency electromagnetic field exposure lends no support to suggestions of adverse effect on spermatogenesis and on germinal epithelium. Testicular morphologic alterations may possibly be due to hormonal alterations.

研究の種別:

研究助成

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