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Percoll density gradient centrifugation and consecutive flow cytometry do not identify leukocytes and leukocyte
T Diemer1, W Weidner, H W Michelmann
1Department of Urology, Georgia-Augusta University, Göttingen, Germany.
Andrologia
|March 1, 1994
Summary
This study explored a combined method for analyzing leukocytes in human ejaculate using Percoll density gradient centrifugation and flow cytometry. The technique proved unsuitable for clinical use due to issues with spermatozoal cross-reactions.
Area of Science:
- Reproductive Biology
- Immunology
- Analytical Chemistry
Background:
- Leukocyte analysis in human ejaculate is crucial for diagnosing reproductive health issues.
- Existing methods for leukocyte isolation and quantification can be challenging.
Purpose of the Study:
- To develop and evaluate a novel combined method for leukocyte analysis in human ejaculate.
- To assess the efficacy of Percoll density gradient centrifugation coupled with flow cytometry for this purpose.
Main Methods:
- Human ejaculate samples were processed using Percoll density gradient centrifugation.
- Leukocyte-rich fractions were isolated at specific Percoll interfaces (40%/60% and 60%/80%).
- Isolated cells were stained with monoclonal antibodies and analyzed via flow cytometry.
Main Results:
- Percoll density gradient centrifugation successfully enriched leukocytes, particularly granulocytes.
- Flow cytometric analysis failed to identify distinct leukocyte populations.
- Questionable cross-reactivity between antibodies and spermatozoal elements was observed.
Conclusions:
- The combined method of Percoll density gradient centrifugation and flow cytometry is not suitable for clinical leukocyte determination in human ejaculate.
- Spermatozoal cross-reactivity poses a significant limitation to this analytical approach.