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

[成獣ウサギの睾丸の機能および構造に対する携帯電話へのばく露の影響（論文取り下げ）] retracted

Effects of exposure to a mobile phone on testicular function and structure in adult rabbit. (RETRACTED)

著者: Salama N, Kishimoto T, Kanayama HO
掲載誌: Int J Androl 2010; 33 (1): 88-94
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研究目的（著者による）

To study the accumulating effects of exposure to mobile phone emission (12 weeks, 8 h daily, standby position) on testicular function and structure of rabbits. (The study was retracted by publisher (Rajpert-De Meyts 2012).)

詳細情報

24 adult male rabbits were randomly and equally divided into three groups: 1) mobile phone exposure, 2) sham exposure group, and 3) cage control group. Semen analysis and sperm function tests were conducted weekly.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 800 MHz
Modulation type: pulsed
ばく露時間: repeated daily exposure, 8 h/day, for 12 weeks
  • 電界強度: 2.92 V/m mean (at 0.5 cm)
  • 電界強度: 0.487 V/m mean (at the most distant region inside the cage)
  • SAR: 0.43 W/kg average over mass (whole body) (FDTD)

ばく露1

主たる特性
周波数 800 MHz
タイプ
  • electromagnetic field
特性
  • near field
ばく露時間 repeated daily exposure, 8 h/day, for 12 weeks
Modulation
Modulation type pulsed
Additional information

GSM
ばく露装置
ばく露の発生源／構造
  • セルラ－電話
  • in standby
チャンバの詳細 Rabbits were individually placed in cages of 50 x 25 x 35 cm without bedding material and were restricted in their movements by plastic partitions according to their sizes averaging 30 x 16 x 18 cm.
ばく露装置の詳細 Rabbits were exposed sitting down with their testes opposite to the antenna of the mobile phone fixed at the cage bottom.
Sham exposure A sham exposure was conducted.
パラメータ
測定量 値 種別 Method Mass 備考
電界強度 2.92 V/m mean 推定値 - at 0.5 cm
電界強度 0.487 V/m mean 推定値 - at the most distant region inside the cage
SAR 0.43 W/kg average over mass 推定値 whole body FDTD
Additional parameter details

For both control groups, the cages were positioned 7 m away and the average field strength was equivalent to background radiation (0.18 V/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:
  • ばく露前
  • ばく露中
  • ばく露後

研究の主なアウトカム（著者による）

Compared to the control groups (groups 2 and 3) a decrease in the sperm concentration appeared in the exposure group at week 6. This became statistically significant at week 8. There was no difference in motile sperm population amongst the three groups until week 10 when it declined significantly in the exposure and sham exposure groups (with more significant decline in the mobile phone exposed animals). Histological examination showed also a significant decrease in the diameter of seminiferous tubules in the mobile phone exposure group versus the two control groups. The other study parameters did not show any difference.
In conclusion, low intensity pulsed radiofrequency emitted by a conventional mobile phone kept in the standby position could affect the testicular function and structure in adult rabbits.

研究の種別:

研究助成

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