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Thyroid hormone influence upon lung surfactant metabolism
Science (New York, N.Y.)
|March 3, 1972
Summary
Thyroid hormones significantly alter lung surfactant production in rats. L-thyroxine appears to be a key regulator of this process, impacting type II pneumonocytes and surfactant phospholipids.
Area of Science:
- Pulmonary physiology
- Endocrinology
- Cell biology
Background:
- Thyroid hormones influence various physiological processes.
- Lung surfactant is crucial for respiratory function.
- Type II pneumonocytes are responsible for surfactant production.
Purpose of the Study:
- To investigate the impact of thyroid administration and thyroidectomy on lung surfactant.
- To correlate ultrastructural changes in type II pneumonocytes with surfactant quantity.
- To determine the role of L-thyroxine in lung surfactant metabolism.
Main Methods:
- Thyroid hormone manipulation (administration andectomy) in rats.
- Morphological analysis of type II pneumonocytes.
- Quantitative assessment of lung surfactant from alveolar washings.
Main Results:
- Thyroid manipulation profoundly affected type II pneumonocyte morphology.
- Significant alterations in the quantitative harvest of lung surfactant were observed.
- Ultrastructural changes correlated with quantitative surfactant changes.
Conclusions:
- Lamellar bodies in type II pneumonocytes are the source of lung surfactant phospholipids.
- L-thyroxine is suggested to be a potent regulator of lung surfactant metabolism in rats.