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Effects of 60 Hz 14 µT magnetic field on the apoptosis of testicular germ cell in mice
Author(s) -
Kim YoonWon,
Kim HeeSung,
Lee JinSang,
Kim YoungJin,
Lee SangKon,
Seo JaeNam,
Jung KyeongCheon,
Kim Nam,
Gimm YounMyoung
Publication year - 2009
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/bem.20448
Subject(s) - tunel assay , apoptosis , germ cell , andrology , biology , terminal deoxynucleotidyl transferase , germ , endocrinology , medicine , microbiology and biotechnology , biochemistry , gene
We recently reported that continuous exposure, for 8 weeks, of extremely low frequency (ELF) magnetic field (MF) of 0.1 or 0.5 mT might induce testicular germ cell apoptosis in BALB/c mice. In that report, the ELF MF exposure did not significantly affect the body weight or testicular weight, but significantly increased the incidence of testicular germ cell death. In the present study, we aimed to further characterize the effect of a 16‐week continuous exposure to ELF MF of 14 or 200 µT on testicular germ cell apoptosis in mice. There were no significant effects of MF on body weight and testosterone levels in mice. In TUNEL staining (In situ terminal deoxynucleotidyl transferase‐mediated deoxy‐UTP nick end labeling), germ cells showed a significantly higher apoptotic rate in exposed mice than in sham controls ( P  < 0.001). TUNEL‐positive cells were mainly spermatogonia. In an electron microscopic study, degenerating spermatogonia showed condensation of nuclear chromatin similar to apoptosis. These results indicate that apoptosis may be induced in spermatogenic cells in mice by continuous exposure to 60 Hz MF of 14 µT. Bioelectromagnetics 30:66–72, 2009. © 2008 Wiley‐Liss, Inc.

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