Related Experiment Videos
Phosphoenolpyruvate carboxykinase activity in human amniotic fluid
American Journal of Obstetrics and Gynecology
|April 15, 1981
Summary
Phosphoenolpyruvate carboxykinase (PEPCK) activity in amniotic fluid is highest in midtrimester pregnancies. This enzyme activity in amniotic fluid cells and supernatant shows distinct levels and stability throughout gestation.
Area of Science:
- Biochemistry
- Obstetrics
- Perinatal Medicine
Background:
- Amniotic fluid contains cells and biochemical components crucial for fetal development.
- Phosphoenolpyruvate carboxykinase (PEPCK) is a key enzyme in gluconeogenesis.
Purpose of the Study:
- To quantify phosphoenolpyruvate carboxykinase (PEPCK) activity in amniotic fluid during normal pregnancy.
- To compare PEPCK activity in amniotic fluid cells versus supernatant.
- To assess changes in PEPCK activity throughout gestation.
Main Methods:
- Amniotic fluid samples were collected from normal pregnancies.
- Quantification of phosphoenolpyruvate carboxykinase (PEPCK) activity in both amniotic fluid cells and supernatant.
Main Results:
- PEPCK activity was significantly higher in amniotic fluid cells during the midtrimester compared to near term.
- Amniotic fluid supernatant exhibited PEPCK activity ranging from 25% to 50% of that found in the cells.
- PEPCK activity in the amniotic fluid supernatant remained relatively stable throughout gestation.
Conclusions:
- Amniotic fluid PEPCK activity levels vary between cellular and supernatant fractions.
- The midtrimester appears to be a peak period for PEPCK activity in amniotic fluid cells.
- Enzyme activity in the amniotic fluid supernatant is consistent during pregnancy, suggesting a stable role.