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Updated: Oct 1, 2026
Fluorimetric Techniques for the Assessment of Sperm Membranes
Published on: November 28, 2018
Effect of carboplatin on the functional integrity of the human sperm membrane in vitro
Werner J Reiter1, Sandra Tomek, Christoph C Zielinski
1Department of Urology, University of Vienna, Austria. werner.reiter@smz.magwien.gv.at
Abstract:
Although it is well known that carboplatin is a drug that binds directly to DNA, causing DNA-DNA and DNA-protein cross-links, which is the presumptive method for killing cells, the whole mechanism of action of carboplatin on spermatozoa is unclear. There are no published data in peer-reviewed journals focused on the interaction between carboplatin and cell membranes. Therefore, the purpose of this study was to investigate the minimal concentration of carboplatin that would affect the functional integrity of the human sperm membrane in an in vitro model. Human-ejaculated spermatozoa were obtained from 20 healthy normozoospermic donors. Solutions (SOL) of 0.5 mL of the semen samples and 0.5 mL NaCl (0.9%) containing increasing concentrations (7.5, 15, 30, and 60 ng) of carboplatin per 1 mL of SOL were prepared. Then, the hypoosmotic-swelling (HOS) test and the eosin test were performed on these samples and compared with the control (no carboplatin) group. Significant damage to the plasma membrane in the head region (eosin test positive) and in the tail region of spermatozoa, as assessed by the HOS test, was observed in concentrations of 30 and 60 ng carboplatin per 1 mL of SOL in comparison to the values evaluated in the control group. The results demonstrate that a minimal carboplatin concentration of 30 ng/mL causes significant damage to membrane integrity of spermatozoa in healthy volunteers.
Insights
Carboplatin damages human sperm membrane integrity at concentrations of 30 ng/mL and higher. This study investigated carboplatin
Area of Science:
- Reproductive Biology
- Toxicology
- Oncology
Background:
- Carboplatin is a chemotherapy drug known to bind DNA, but its effects on sperm cell membranes are not well understood.
- Existing research primarily focuses on carboplatin's DNA-damaging properties, leaving a gap in knowledge regarding its impact on sperm membrane integrity.
Purpose of the Study:
- To determine the minimum concentration of carboplatin that negatively affects the functional integrity of human sperm membranes in an in vitro setting.
- To investigate the interaction between carboplatin and sperm cell membranes.
Main Methods:
- Human spermatozoa from healthy donors were exposed to varying concentrations of carboplatin (7.5, 15, 30, 60 ng/mL) in an in vitro model.
- The hypoosmotic-swelling (HOS) test and eosin staining were used to assess sperm membrane integrity and functionality.
- Results were compared against a control group that did not receive carboplatin treatment.
Main Results:
- Significant damage to the sperm plasma membrane, particularly in the head and tail regions, was observed at carboplatin concentrations of 30 ng/mL and 60 ng/mL.
- The eosin test indicated compromised membrane integrity in the head region, while the HOS test revealed damage in the tail region at these concentrations.
- These effects were statistically significant when compared to the control group.
Conclusions:
- A minimal carboplatin concentration of 30 ng/mL is sufficient to cause significant damage to the membrane integrity of human spermatozoa.
- These findings highlight a potential risk of carboplatin exposure to sperm health and reproductive function.
- Further research is warranted to fully elucidate the mechanisms of carboplatin's action on sperm cells.
