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Related Experiment Videos

Enzyme histochemical patterns in the normal human amnion: amniotic histochemical patterns.

R A Jones, S M Pollard

    European Journal of Obstetrics, Gynecology, and Reproductive Biology
    |January 1, 1977
    PubMed
    Summary
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    This study maps enzyme activity in the human amnion at term. Specific enzymes like alkaline phosphatase identify distinct cell types in the amnion.

    Area of Science:

    • Histochemistry
    • Human Embryology
    • Cell Biology

    Background:

    • The human amnion plays a crucial role in fetal development and protection.
    • Understanding the biochemical properties of amniotic cells is essential for developmental biology.

    Purpose of the Study:

    • To describe the histochemical distribution of 14 enzymes in the human amnion at term.
    • To identify distinct cell subpopulations within the amnion based on enzyme activity.

    Main Methods:

    • Histochemical analysis of human amnion tissue obtained at term.
    • Assay of 14 different enzymes, including adenosine triphosphatase, 5'-nucleotidase, acid phosphatase, nonspecific esterase, and alkaline phosphatase.

    Main Results:

    • Continuous gradations of enzyme activity were observed for adenosine triphosphatase, 5'-nucleotidase, acid phosphatase, and nonspecific esterase.

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  • Cells with intense acid phosphatase and nonspecific esterase activity were prominent.
  • A distinct subpopulation of amniotic cells was identified by their alkaline phosphatase activity.

    • Conclusions:

    • The study successfully mapped the histochemical distribution of key enzymes in the term human amnion.
    • Alkaline phosphatase activity serves as a marker for a specific subpopulation of amniotic cells.
    • The findings provide a basis for correlating enzyme distribution with amniotic cell morphology and function.