Biol Reprod 2009 SSR Annual Meeting Abstracts
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Biology of Reproduction, Vol 43, 55-64, Copyright © 1990 by Society for the Study of Reproduction

ARTICLES

Analysis of sperm cell viability, acrosomal integrity, and mitochondrial function using flow cytometry

JK Graham, E Kunze and RH Hammerstedt
Biochemistry Program, Pennsylvania State University, University Park 16802.

A triple staining procedure was developed to evaluate bull spermatozoa using flow cytometry. Flow cytometric estimates of cell viability, measured by propidium iodide (PI) exclusion, and acrosomal integrity, measured by Pisum sativum agglutinin (PSA) binding acrosomal contents, were equivalent to estimates made by using standard laboratory assays. Mitochondrial function, measured by rhodamine 123 (R123) fluorescence, was depressed by the mitochondrial inhibitors rotenone (64%) or monensin (52%), establishing that mitochondrial damage can be detected. Dilauroylphosphatidylcholine (PC12) or lysophosphatidylcholine (LPC) was used to destabilize sperm membranes. When challenged with 15-30 microM PC12, selective exposure of PSA binding sites occurred without induction of PI uptake or loss of R123 staining. However, PC12 concentrations greater than 60 microM resulted in a loss of R123 fluorescence intensity. In contrast, greater than 1200 microM LPC was required to expose PSA binding sites, which also resulted in PI uptake. By using flow cytometry, these three stains in combination can be used to correlate three different features simultaneously on individual spermatozoa and assay thousands of cells per sample without extensive preparation.


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