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Theriogenology. 2011 Jan 15;75(2):197-205. doi: 10.1016/j.theriogenology.2010.08.006. Epub 2010 Oct 6.

Sex-sorted bovine spermatozoa and DNA damage: I. Static features.

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  • 1Departamento de Biología, Unidad de Genética, Universidad Autónoma de Madrid, 20849-Madrid, Spain.


This study examined the static response of Spermatozoa DNA Fragmentation (SDF) after sex selection in bulls using a MoFlo(®) SX (Beckman Coulter, Miami FL) spermatozoa sorter to produce three different subpopulations: 1) Spermatozoa bearing X- chromosomes with a purity of 95%, 2) Spermatozoa bearing Y-chromosomes with a purity of 95%, and 3) non-viable spermatozoa. The static response of SDF refers to the baseline values observed for DNA damage when analyzed pre- and post sex-sorting. Results showed that while the baseline level SDF in pre-sorted bull spermatozoa samples ranged from 5.3% to 11% with an average of 7.9% ± 2.1%, the level of SDF obtained in X- and Y-chromosome sorted samples was much lower (3.1% ± 1.9%) and statistical differences were obtained after comparing both groups (P < 0.01). Spermatozoa containing a fragmented DNA molecule tend to be accumulated in the non-viable subpopulation. The baseline SDF level in X- and Y-chromosome sorted subpopulations is reduced, by 63% on average when compared to the values obtained in the neat semen sample. Different bulls exhibit unique SDF reduction efficiencies via the X- and Y-chromosome sex selection process.

Copyright © 2011 Elsevier Inc. All rights reserved.

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