この研究は、ヒト精子（12人の健常ボランティアから収集）の受精能力に対する無線周波数電磁界（RF-EMF：SAR2.0 W/ kg の900MHz携帯電話電磁界の1時間ばく露）の影響を、ばく露直後（T1）、2時間後（T2）、24時間後（T3）に調べた。その結果、先体反応に対するRF-EMFばく露の影響はなかった；ばく露群と対照群で、精子頭部面積（9.2 ± 0.7 μm2 vs. 18.8 ± 1.4 μm2）と頭部面積中の先体の割合（21.5 ± 4% vs. 35.5 ± 11.4%）となり、対照群に比べばく露群で減少していた；半切透明帯検査による精子と透明帯の結合能がばく露群で対照群より低下していた、などの所見を報告している。
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The objective of the study was twofold: 1) to investigate the effect of radiofrequency electromagnetic field exposure on sperm head morphometry and the acrosome response and 2) to evaluate the consequence of exposure on the spermatozoa's zona pellucida-binding capacity.
Semen samples were collected from 12 healthy donors. Spermatozoa were investigated immediately, 2 h and 24 h after exposure.
ばく露時間: continuous for 1 h
|continuous for 1 h
|exposure chamber placed vertically inside a Forma CO2 incubator
|samples placed in glass Petri dishes in the exposure chamber with the plane of the culture medium parallel to the electric field; temperature-controlled water circulated through a thin rectangular glass-fibre-moulded waterbed underneath the Petri dishes
|A sham exposure was conducted.
The irradiation did not affect the acrosome reaction. The analysis of morphometric parameters revealed a statistically significant reduction in all the morphometric parameters of exposed sperm samples compared with unexposed controls. There was a statistically significant reduction in zona pellucida binding in exposed sperms compared with that in controls.
The authors conclude that although radiofrequency electromagnetic field exposure did not adversely affect the acrosome reaction, it had a significant effect on sperm morphometry. In addition, a significant decrease in sperm binding to the hemizona was observed. These results could indicate a significant effect of radiofrequency electromagnetic field on sperm fertilization potential.