The effect of platelet activating factor on different phases of murine in vitro fertilization
1Department of Obstetrics and Gynecology, Ohio State University Hospitals, Columbus 43210.
Purpose:
Our purpose was to examine the effect of platelet activating factor (PAF) in different phases of mouse in vitro fertilization and optimal parameters that would enhance the fertilization rate.
Design And Settings:
Various PAF concentrations (10(-7) to 10(-5) M) were selected to investigate its effect on three phases of mouse in vitro fertilization (i.e., sperm capacitation, sperm/oocyte coincubation, and preimplantation embryo growth) in three experimental groups: (I) with PAF treatment in the first phase, (II) with PAF treatment adopted in the first and second phases, and (III) with PAF treatment implemented in all three phases.
Results:
The improvement of the fertilization rate in PAF treatment groups over the control group ranges from 6.5 to 19.0% (P < 0.05-P < 0.001). The highest enhancement of fertilization rate was achieved under the condition of PAF treatment (10(-6) M) through sperm capacitation and sperm/oocyte coincubation phases.
Conclusion:
The PAF concentration of 10(-6) M in sperm capacitation and sperm/oocyte coincubation yielded the greatest improvement in fertilization. However, continuing PAF treatment after sperm/oocyte coincubation had no beneficial effect on fertilization and preimplantation development.
Insights
Platelet activating factor (PAF) at 10(-6) M significantly enhances mouse in vitro fertilization rates when applied during sperm capacitation and oocyte coincubation. Further PAF treatment offers no additional benefit to fertilization or embryo development.
Area of Science:
- Reproductive Biology
- Cell Signaling
Background:
- Platelet activating factor (PAF) is a bioactive lipid mediator.
- Understanding PAF's role in fertilization is crucial for improving in vitro fertilization (IVF) success rates.
Purpose of the Study:
- To investigate the impact of PAF on different stages of mouse in vitro fertilization.
- To determine optimal PAF parameters for enhancing fertilization rates.
Main Methods:
- Mouse in vitro fertilization was performed with varying PAF concentrations (10(-7) to 10(-5) M).
- PAF was applied during sperm capacitation, sperm/oocyte coincubation, and preimplantation embryo growth phases.
- Three experimental groups received PAF treatment in one, two, or all three phases.
Main Results:
- PAF treatment increased fertilization rates by 6.5% to 19.0% compared to controls (P < 0.05-P < 0.001).
- Optimal enhancement was observed with 10(-6) M PAF during sperm capacitation and sperm/oocyte coincubation.
- No additional benefit was seen when PAF treatment extended beyond the coincubation phase.
Conclusions:
- A PAF concentration of 10(-6) M during sperm capacitation and coincubation maximizes fertilization improvement in mice.
- Sustained PAF treatment post-coincubation does not enhance fertilization or subsequent embryo development.
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