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Related Experiment Videos

Glycogen metabolism during human liver development.

B G Devi1, C M Habeebullah, P D Gupta

  • 1Department of Gastroenterology, Osmania General Hospital, Hyderabad, India.

Biochemistry International
|October 1, 1992
PubMed
Summary

Human fetal liver glycogen accumulation is regulated by glycogen synthetase a and phosphorylase a enzymes. This study charts their development, crucial for newborn nutritional independence.

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Area of Science:

  • Biochemistry
  • Developmental Biology
  • Hepatology

Background:

  • Glycogen metabolism is vital for energy storage and release in the liver.
  • Understanding fetal and neonatal liver development is key to infant health.
  • Enzymatic regulation of glycogen stores prepares newborns for extrauterine life.

Purpose of the Study:

  • To investigate the developmental profile of glycogen metabolism enzymes in the human fetal and neonatal liver.
  • To correlate glycogen storage with the activity of key metabolic enzymes.
  • To establish a comprehensive understanding of hepatic glycogen regulation during the perinatal transition.

Main Methods:

  • Analysis of glycogen content in human fetal and neonatal liver samples.
  • Assay of glycogen synthetase a and glycogen phosphorylase a enzyme activities.
  • Ultrastructural examination of liver tissue for glycogen detection.

Main Results:

  • Quantifiable glycogen was detected from early gestation, with ultrastructural evidence appearing after 20 weeks.
  • Increased glycogen synthetase a activity correlated with glycogen accumulation between 21-36 weeks of gestation.
  • A surge in glycogen phosphorylase a activity at birth facilitated rapid glycogen degradation.

Conclusions:

  • This study provides the first complete profile of glycogen storage and enzyme differentiation in the developing human liver.
  • Enzyme activity changes are critical for managing hepatic glycogen stores during the transition to independent nutrition after birth.
  • The findings highlight the intricate enzymatic mechanisms supporting fetal development and neonatal adaptation.

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