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Immature germ cell separation using a modified discontinuous Percoll gradient technique in human semen.
L Gandini1, A Lenzi, F Lombardo
1Dept of Medical Pathophysiology, University of Rome La Sapienza, Policlinico Umberto I, Italy.
Human Reproduction (Oxford, England)
|April 30, 1999
Summary
Identifying immature germ cells in semen is challenging. This study presents a modified Percoll gradient method for effective separation of immature germ cells, aiding in diagnostics and research.
Area of Science:
- Reproductive Biology
- Andrology
- Cell Biology
Background:
- Distinguishing immature germ cells from leukocytes in semen is difficult, often leading to their misclassification as 'round cells'.
- Limited research has focused on immature germ cells in semen, hindering diagnostic and research efforts.
Purpose of the Study:
- To develop and validate a method for isolating immature germ cells from ejaculates.
- To obtain a sperm-free cellular suspension enriched in immature germ cells for further analysis.
Main Methods:
- A modified discontinuous Percoll gradient centrifugation technique was employed.
- Cellular suspensions were analyzed for immature germ cell concentration and purity.
- Leukocyte contamination was assessed using May-Grünwald-Giemsa staining, immunofluorescence, and cytofluorimetry.
Main Results:
- The Percoll gradient method effectively separated immature germ cells, yielding sperm-free fractions.
- High concentrations of immature germ cells were found in 30%-45% Percoll gradients.
- Leukocyte contamination was minimal (1.5-6%) and quantifiable.
Conclusions:
- The developed technique provides a reliable method for purifying immature germ cells from semen.
- This method facilitates the study of immature germ cells in various andrological conditions, including obstructive azoospermia, oligozoospermia, and genital tract infections.
- Purified immature germ cell suspensions are valuable for both diagnostic applications and scientific research.