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

[携帯電話使用者の精液の品質] med./bio.

The semen quality of the mobile phone users.

掲載誌: J Endocrinol Invest 2013; 36 (11): 970-974

この研究は、携帯電話の使用時間に応じて被験者を4 群に分け、採集した精液の品質(濃度、総数、形態、前進運動性アポトーシスミトコンドリア膜電位クロマチン凝縮、DNA断片化)を調べた。A群:不使用(n=10)、B群:<2時間/日(n=16)、C群:2-4時間/日(n=17)D群:>2時間/日(n=20)とし、D群はさらにスボンでの携帯者(n=12)とシャツでの携帯者(n=8)に分けた。その結果、調べた精液パラメータに有意な変化はなかった;ただし、D群およびスボンでの携帯者では、他の群に比べ、DNA断片化の割合がやや高かった、と報告している。

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研究目的(著者による)

The effects of mobile phone usage of men on semen quality, dimensions of semen-producing organs and the levels of some sex hormones in the blood should be investigated.

詳細情報

63 healthy and fertile men were divided into 4 groups, according to their daily usage time of the mobile phone (via questionnaire): 1) no mobile phone use (n=10), 2) <2 h/day (n=16), 3) 2-4 h/day (n=17) 4) >4 h/day (n=20). Group 4) was further subdivided into 4a) "trousers users" (n=12) and 4b) "shirt users" (n=8). Trousers users were considered the men who usually carry the phone in the pocket of the pants. Shirt users were considered the men who usually carry the phone in the pocket of the shirt.
Two semen samples from each subject were examined in the tests on semen quality.

影響評価項目

ばく露

ばく露 パラメータ
ばく露1: 850–2,100 MHz
ばく露時間: <2 hours/day mobile phone usage
group 2
-
ばく露2: 850–2,100 MHz
ばく露時間: 2-4 hours/day mobile phone usage
group 3
-
ばく露3: 850–2,100 MHz
ばく露時間: >4 hours/day mobile phone usage
groups 4a and 4b
-

General information

all the examined subjects had used the same mobile phone device [UMTS/HSDPA/HSUPA (850, 900, 1900, 2100 MHz)] during the year before the study and reported that the device had been turned on 24 h of the day (data obtained by questionnaire)

ばく露1

主たる特性
周波数 850–2,100 MHz
タイプ
  • electromagnetic field
ばく露時間 <2 hours/day mobile phone usage
Additional information group 2
ばく露装置
ばく露の発生源/構造
  • セルラ-電話
パラメータ

No parameters are specified for this exposure.

ばく露2

主たる特性
周波数 850–2,100 MHz
タイプ
  • electromagnetic field
ばく露時間 2-4 hours/day mobile phone usage
Additional information group 3
ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
パラメータ

No parameters are specified for this exposure.

ばく露3

主たる特性
周波数 850–2,100 MHz
タイプ
  • electromagnetic field
ばく露時間 >4 hours/day mobile phone usage
Additional information groups 4a and 4b
ばく露装置
ばく露の発生源/構造
  • E1と同じ装置
パラメータ

No parameters are specified for this exposure.

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)

None of the examined parameters showed significant differences between the groups except for DNA fragmentation in sperms. This was significantly increased in group 4 (>4 h mobile phone usage/day) compared to the other groups. Moreover, it was significantly increased in the sub-group 4a) "trousers users" compared to the sub-group 4b) "shirt users" within group 4.
The authors conclude that mobile phone use of more than 4 h/day, in particular if the device is carried in the pocket of the trousers, might result in DNA damage in sperms.

研究の種別:

研究助成

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