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Flow cytometric sorting of non-human primate sperm nuclei
Justine K O'Brien1, Tomas Stojanov, Scott J Heffernan
1Faculty of Veterinary Science, Centre for Advanced Technologies in Animal Genetics and Reproduction, University of Sydney, NSW 2006, Australia. justineo@vetsci.usyd.edu.au
Theriogenology
|December 14, 2004
Summary
This study successfully adapted flow cytometry to sort X- and Y-chromosome-bearing sperm in non-human primates. This technology enables sex pre-determination for wildlife conservation and assisted reproductive technologies.
Area of Science:
- Reproductive Biology
- Genetics
- Wildlife Conservation
Background:
- Controlling offspring sex is crucial for managing captive wildlife, especially species with single-sex social structures.
- Assisted reproductive technologies (ART) can benefit from sperm sorting to pre-determine offspring sex.
Purpose of the Study:
- To adapt flow cytometry for sorting X- and Y-chromosome-bearing spermatozoa in non-human primates.
- To determine DNA content differences between X- and Y-sperm.
- To assess the accuracy of sperm sorting for ART applications.
Main Methods:
- Collected spermatozoa from common marmosets, hamadryas baboons, common chimpanzees, and humans (control).
- Stained sperm nuclei with Hoechst 33342 and analyzed using high-speed flow cytometry.
- Evaluated sorting accuracy using flow cytometric reanalysis and fluorescence in situ hybridization (FISH).
Main Results:
- Identified distinct DNA content differences between X- and Y-sperm populations across species.
- Achieved high purity levels for X- and Y-enriched sperm samples (ranging from 91% to 97%).
- Demonstrated consistency between flow cytometric reanalysis and FISH for accuracy assessment.
Conclusions:
- Flow cytometry is a viable technology for high-purity sorting of non-human primate spermatozoa.
- This technique holds significant potential for applications in wildlife management and conservation programs.
- Successful sperm sorting facilitates the use of ART for sex pre-determination in endangered species.