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Related Experiment Video

Updated: Apr 15, 2026

Determining Ciliary Function and Membrane Impermeability of the Pseudostratified Lung Airway Epithelium
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Ultrastructure of Developing Feline Nonciliated Bronchiolar Epithelial Cells.

Mohammed S Al-Tikriti1, R W Henry

  • 1Department of Anatomy, College of Osteopathic Medicine of the Pacific, Western University of Health Sciences , Pomona, CA , USA and.

Ultrastructural Pathology
|April 14, 2015
PubMed
Summary

This study details the development of nonciliated bronchiolar cells (NBCs) in kittens. NBCs mature by three weeks, showing ultrastructural changes in glycogen and secretion modes.

Keywords:
Bronchiolarclara cellsepithelial cellsnonciliated

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Area of Science:

  • Pulmonary Biology
  • Cellular Ultrastructure
  • Developmental Biology

Background:

  • Bronchiolar epithelium plays a crucial role in lung function.
  • Understanding the development of nonciliated bronchiolar cells (NBCs) is key to respiratory health.

Purpose of the Study:

  • To investigate the ultrastructural development of NBCs in kittens.
  • To characterize the cellular changes from prenatal to adult stages.

Main Methods:

  • Examined lung tissue from six age groups (prenatal to adult) using scanning and transmission electron microscopy.
  • Utilized intratracheal fixation for tissue preservation.

Main Results:

  • Identified NBCs by their indented nucleus and apical microvilli (absent prenatally).
  • Observed abundant mitochondria and glycogen in adult NBCs; prenatal cells showed abundant alpha and beta glycogen, decreasing postnatally.
  • Noted cytoplasmic islands in adult bronchiolar lumens, suggesting apocrine secretion.

Conclusions:

  • NBCs achieve maturity by three weeks of age.
  • Development involves significant changes in glycogen content and distribution.
  • Evidence suggests an apocrine secretion mechanism in mature NBCs.