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- W2056511691 abstract "A micronucleus test method to assess radiation-induced chromosomal damage in human spermatozoa is described, and its efficiency examined by comparison with that of sperm chromosome analysis. Human spermatozoa were exposed in vitro to 1.11 and 2.13 Gy of 137 Cs γ-rays at a dose rate of 1.36 Gy/min. After interspecific in vitro fertilization of irradiated spermatozoa with zona-free hamster oocytes, a total of 193 monospermic eggs were examined with the micronucleus test at the 2-cell stage, and a total of 304 male pronuclear chromosome plates were analyzed according to our established method. The incidence of 2-cell embryos with micronuclei coincided well with the incidence of spermatozoa with chromosomal breaks and fragments (51.6% vs. 50.3% in the 1.11-Gy group and 82.7% vs. 79.3% in the 2.13-Gy group). A similar correlation was also found between the number of micronuclei per embryo and the number of breaks and fragments per spermatozoon (0.85 vs. 0.88 and 1.50 vs. 1.45 in the 2 dose groups, respectively). These results indicate that our micronucleus test is useful as a simple and rapid method for assessing the clastogenic effects of various environmental mutagens on human sperm chromosomes." @default.
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- W2056511691 date "1991-06-01" @default.
- W2056511691 modified "2023-10-01" @default.
- W2056511691 title "Micronucleus test in 2-cell embryos as a simple assay system for human sperm chromosome aberrations" @default.
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- W2056511691 doi "https://doi.org/10.1016/0165-1161(91)90009-w" @default.
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