【目的】携帯電話会話モード中のRF電磁波(RF-EMW)が射精させた未処理精液に与える影響を調べること。【方法】健常ドナー(n=23)および不妊患者(n=9)の精液標本は液化後、二つの部分標本に分けられた。一方はばく露用とし、他方は対照として一定の条件で保存された。ばく露は携帯電話の会話モードで1時間行われた。主な評価項目は、精子パラメタ(運動率、生存率)、活性酸素種(ROS)、全抗酸化力(TAC)、ROS-TACスコア、精子DNA損傷とした。【結果】RF-EMFばく露群は、精子の運動率および生存率の著しい低下、ROSレベルの上昇、ROS-TACスコアの低下を示した。TACレベルおよびDNA損傷には、対照群との大きな違いは見られなかった。【結論】携帯電話が放射する無線周波電磁波はヒト精液に酸化ストレスを生じる可能性がある。
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To study the effects of mobile phone radiofrequency electromagnetic fields during talk mode on unprocessed (neat) ejaculated human semen.
Semen samples from normal healthy donors (n=23) and infertile patients (n=9) were used. Semen samples were divided into two aliquots (for exposure and sham exposure). Analysis were performed between overall exposed and unexposed samples as well as separately in patient and donor samples.
周波数 | 850 MHz |
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タイプ |
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ばく露時間 | continuous for 60 min |
Modulation type | pulsed |
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Additional information |
GSM in talk mode |
ばく露の発生源/構造 |
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Distance between exposed object and exposure source | 2.5 cm |
チャンバの詳細 | Both samples (aliquots) were kept at room temperature. |
ばく露装置の詳細 | The mobile phone had a loop-shaped, omni-directional antenna on the top of its back that was kept at 2.5 cm from each sample. |
Sham exposure | A sham exposure was conducted. |
Additional information | Unexposed (control) aliquots were kept under identical conditions but without RF exposure [Oktem et al., 2005]. |
Exposed samples showed a significant decrease in sperm motility and viability, an increase in reactive oxygen species level (in all groups: overall, normal donors, patients), and decrease in "reactive oxygen species - total antioxidant capacity" score (however, the score was not significant when comparing exposed and unexposed samples from donors and patients). Levels of total antioxidant capacity and DNA damage showed no significant differences from the unexposed group.
In conclusion, radiofrequency electromagnetic fields emitted from mobile phones may lead to oxidative stress in human semen. The authors speculate that keeping the cell phone in a trouser pocket in talk mode (e.g. while using Bluetooth) may negatively affect spermatozoa and impair male fertility. However, the cell phone and the male reproductive organs are separated by multiple tissue layers, so to extrapolate the effects seen under in vitro conditions to real-life conditions requires further studies.
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