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High progesterone concentrations induce acrosome reaction with a low cytotoxic effect
J Parinaud1, B Labal, G Vieitez
1Institut National de la Santé et de la Recherche Médicale, (INSERM CJF 89-08), Toulouse, France.
Fertility and Sterility
|September 1, 1992
Summary
Progesterone effectively induces sperm acrosome reaction for micromanipulation. This method yields live, reacted sperm with high motility and viability, crucial for assisted reproductive technologies.
Area of Science:
- Reproductive Biology
- Sperm Physiology
- Assisted Reproductive Technology
Background:
- The acrosome reaction is essential for fertilization.
- Obtaining live, acrosome-reacted spermatozoa is critical for micromanipulation techniques in assisted reproduction.
Purpose of the Study:
- To identify optimal conditions for inducing the sperm acrosome reaction.
- To evaluate methods for preparing live, acrosome-reacted spermatozoa for micromanipulation.
Main Methods:
- Sperm were incubated with progesterone (P) or calcium ionophore A23187.
- Time and dose-dependent effects were assessed.
- Peanut agglutinin lectin assay was used to determine acrosome reaction status, motility, and viability.
Main Results:
- 1 mmol/L progesterone (P) induced a 48% acrosome reaction after 6 hours, maintaining high motility (49%) and viability (70%).
- This resulted in 27% live, acrosome-reacted spermatozoa.
- Calcium ionophore A23187 yielded similar live reacted sperm percentages (26%) but significantly reduced motility and viability.
Conclusions:
- High concentrations of progesterone are effective for inducing sperm acrosome reactions.
- Progesterone treatment is a suitable method for preparing live, acrosome-reacted spermatozoa for micromanipulation procedures.