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Platelet-activating factor acetylhydrolase in human seminal plasma
E D Letendre1, P Miron, K D Roberts
1University of Montreal, Maisonneuve-Rosemont Hospital Research Center, Quebec, Canada.
Fertility and Sterility
|January 1, 1992
Summary
Human seminal plasma contains significant platelet-activating factor (PAF) acetylhydrolase activity. This enzyme, found in high-density lipoproteins, may regulate PAF levels and activity in reproductive health.
Area of Science:
- Reproductive Biology
- Enzymology
Background:
- Platelet-activating factor (PAF) is a potent lipid mediator involved in various physiological and pathological processes.
- Understanding the enzymatic regulation of PAF in human reproductive fluids is crucial.
Purpose of the Study:
- To investigate the presence and characteristics of PAF acetylhydrolase activity in human seminal plasma.
Main Methods:
- Experimental study conducted in a university-affiliated hospital research center.
- Human male volunteers with apparent normal health were recruited.
- PAF acetylhydrolase activity was measured in seminal plasma.
Main Results:
- Significant levels of PAF acetylhydrolase activity were detected in human seminal plasma.
- The enzyme exhibited typical hydrolysis kinetics and was calcium-independent.
- PAF acetylhydrolase activity was associated with the very high-density lipoprotein fraction and was independent of sperm parameters.
Conclusions:
- Human seminal plasma possesses substantial PAF acetylhydrolase activity.
- This enzyme likely plays a key role in modulating PAF concentration and biological effects within the seminal environment.