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Fructose and proteins in human semen
P Van Dreden1, P Richard, J Gonzales
1Laboratoire de Biologie de la Reproduction et Cytogénétique, Hôpital de la Pitié, Paris, France.
Andrologia
|November 1, 1989
Summary
Human seminal fructose levels increase after deproteinization, suggesting fructose binds to high molecular weight proteins. This binding may explain stable fructose concentrations in semen for several hours post-collection.
Area of Science:
- Biochemistry
- Reproductive Biology
Background:
- Seminal fructose is a key energy source for sperm motility.
- Accurate measurement of seminal fructose is important for male fertility assessment.
- Seminal protein content can interfere with fructose determination methods.
Purpose of the Study:
- To correlate human seminal fructose levels measured by enzymatic UV method with protein content.
- To investigate the impact of deproteinization on fructose level determination.
- To assess changes in protein and fructose levels over time post-collection.
Main Methods:
- Enzymatic UV method for fructose determination.
- Biuret, Lowry, and Meulemans methods for protein quantification.
- Analysis of seminal samples at different time points after collection at 20°C.
Main Results:
- Deproteinization significantly increased measured fructose levels (14.1 ± 3.7 mMol/l vs. 4.2 ± 1.7 mMol/l).
- No significant changes in protein or fructose levels were observed within the first four hours post-collection at 20°C.
- Data suggest fructose is primarily associated with higher molecular weight seminal proteins.
Conclusions:
- Fructose's association with high molecular weight proteins influences its measurement.
- The stability of seminal fructose in the initial hours post-collection is likely due to this protein binding.
- Further research may refine diagnostic accuracy for male fertility by considering protein interactions.