triple-stain flow cytometric method to assess plasma- and acrosome-membrane integrity of cryopreserved bovine sperm immediately after thawing in presence of egg-yolk particles
Simultaneously evaluating postthaw viability and acrosome integrity of spermatozoa by flow cytometry would provide a valuable testing tool in both research and routine work. In the present study, a new triple-stain combination was developed for the simultaneous evaluation of viability and acrosome i...
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Published in | Biology of reproduction Vol. 68; no. 5; pp. 1828 - 1835 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Madison, WI
Society for the Study of Reproduction
01.05.2003
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Subjects | |
Online Access | Get full text |
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Summary: | Simultaneously evaluating postthaw viability and acrosome integrity of spermatozoa by flow cytometry would provide a valuable
testing tool in both research and routine work. In the present study, a new triple-stain combination was developed for the
simultaneous evaluation of viability and acrosome integrity of bovine sperm processed in egg yolk-based extender by flow cytometer.
SYBR-14 and propidium iodide (PI) enabled the discrimination of sperm cells from egg yolk and debris particles, which was
instrumental for the flow cytometric analyses of frozen-thawed bovine sperm, because it implied that washing steps to remove
egg yolk were no longer required. In addition, phycoerythrin-conjugated peanut agglutinin (PE-PNA) was used to discriminate
acrosome-damaged/reacted sperm cells from acrosome-intact cells. Repeatability was calculated using two processed ejaculates
of 10 bulls. Three straws per batch were analyzed in duplicate measurements. Method-agreement analysis between the SYBR-14/PE-PNA/PI
and fluorescein isothiocyanate (FITC)-conjugated PNA was performed, with FITC-PNA/PI staining being carried out on 14 frozen-thawed
semen samples immediately after thawing and after a 3-h incubation at 37°C. The British Standards Institution repeatability
index of the SYBR-14/PE-PNA/PI combination was 2.6%. On average, the FITC-PNA/PI method showed a 6.3% overestimation of the
live and acrosome-intact sperm cell subpopulation. In conclusion, the new triple-stain combination is highly repeatable and
easy to use in routine application, and it provides a more precise estimate for the rate of sperm cells with intact head membrane
and acrosome compared to the generally used and validated FITC-PNA/PI staining. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 0006-3363 1529-7268 |
DOI: | 10.1095/biolreprod.102.011445 |