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Proteins in human uterine fluid

G P Roberts, J M Parker, S R Henderson

Journal of Reproduction and Fertility

|September 1, 1976

Summary

Researchers analyzed uterine proteins during the menstrual cycle. Uterine washings contained serum proteins and some uterine-specific proteins, with elevated glycosidase enzyme activities compared to serum.

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Area of Science:

Gynecological research
Protein biochemistry
Enzymology

Background:

The uterine environment undergoes significant physiological changes throughout the menstrual cycle.
Understanding the protein composition of uterine secretions is crucial for reproductive health research.

Purpose of the Study:

To characterize the protein profile of uterine washings across different menstrual cycle stages.
To identify uterine-specific proteins and analyze glycosidase enzyme activities in these washings.

Main Methods:

Proteins from uterine washings were analyzed using polyacrylamide gel electrophoresis (PAGE) at pH 4-5 and 8-9.
Isoelectric focusing in polyacrylamide and immunoelectrophoresis were employed for protein separation and identification.
Glycosidase enzyme activities (alpha-L-fucosidase, beta-N-acetylgalactosaminidase, beta-N-acetylglucosaminidase) were measured.

Main Results:

The primary protein components detected in uterine washings were identified as serum proteins.
Small quantities of proteins unique to the uterus were also identified.
Elevated levels of specific glycosidase enzymes, including alpha-L-fucosidase, beta-N-acetylgalactosaminidase, and beta-N-acetylglucosaminidase, were observed in uterine washings compared to serum.

Conclusions:

Uterine washings contain a mixture of serum and uterine-specific proteins.
Certain glycosidase enzyme activities are significantly higher in the uterine environment than in serum.
These findings contribute to the understanding of the biochemical composition of the human uterus during the menstrual cycle.

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