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Related Experiment Videos

Cytochrome c oxidase during human fetal development.

M Moggio1, N Bresolin, E Scarpini

  • 1Istituto di Clinica Neurologica, Università degli Studi di Milano, Italy.

International Journal of Developmental Neuroscience : the Official Journal of the International Society for Developmental Neuroscience
|January 1, 1989
PubMed
Summary

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Cytochrome c oxidase (COX) activity in human fetal tissues develops gradually. Skeletal muscle shows delayed COX enzyme activity compared to the heart and kidney during development.

Area of Science:

  • Biochemistry
  • Developmental Biology
  • Histology

Background:

  • Cytochrome c oxidase (COX) is crucial for cellular respiration.
  • Understanding COX development is key to fetal health.
  • Limited data exists on COX enzyme maturation in human fetal tissues.

Purpose of the Study:

  • To analyze the developmental timeline of COX activity in human fetal skeletal muscle, heart, and kidney.
  • To correlate COX activity with enzyme synthesis during human fetal development.

Main Methods:

  • Histochemical staining for COX activity.
  • Biochemical assays to quantify COX enzyme levels.
  • Immunocytochemical analysis and ELISA for enzyme synthesis confirmation.

Main Results:

Related Experiment Videos

  • COX activity was sparse in skeletal muscle fibers between 11-20 weeks gestation.
  • Intrafusal muscle fibers, heart, and kidney exhibited strong COX activity early in development (11-20 weeks).
  • By 28 weeks gestation, approximately 90% of muscle fibers displayed COX activity, consistent with enzyme synthesis.

Conclusions:

  • COX activity development is tissue-specific during human fetal growth.
  • Enzyme synthesis, confirmed by biochemical and immunologic methods, directly correlates with observed COX activity.
  • This study provides a detailed map of COX maturation in key human fetal organs.