Abstract
Recently it has been shown that the nucleus of the human spermatozoon appears to possess a specific architecture. The current prevailing view is that spatial organization of the male genome contains information critical for the spermatozoon’s function as well as for early embryonic development. The purpose of this study was to determine whether there are alterations in intranuclear localization of centromeres in spermatozoa of chromosomes associated with particular reciprocal chromosome translocations (RCT). We analyzed the longitudinal and spatial localization of centromeres of selected chromosomes in sperm nuclei of four control males with normal karyotypes as well as in six carriers of reciprocal chromosome translocations: t(1;7), t(7;2), t(7;13), t(7;9), t(9;14), and t(4;13). Our study revealed that chromosomes with translocations may have shifted their intranuclear localization and that these translocations may influence the localization of other chromosomes in sperm nuclei. The chromocenter in sperm nuclei of translocation carriers was widened toward the apical side in comparison with chromocenter sites visible in control males. Our study also revealed interindividual differences in the localization of the Y chromosome centromere in the chromocenter area of sperm from fertile individuals.
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Wiland, E., Żegało, M. & Kurpisz, M. Interindividual differences and alterations in the topology of chromosomes in human sperm nuclei of fertile donors and carriers of reciprocal translocations. Chromosome Res 16, 291–305 (2008). https://doi.org/10.1007/s10577-007-1194-2
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DOI: https://doi.org/10.1007/s10577-007-1194-2