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Lung tissue samples from 35 human fetuses (8 to 25 weeks gestation) and 18 newborn infants (25 to 41 weeks gestation who survived less than 28 days) were examined by light and transmission electron microscopy for the presence of Kulchitsky-like cells and for the peptide hormones IR bombesin and IR calcitonin. K-like cells were found in developing intrapulmonary conducting airways from bronchi through alveolar ducts, appearing both as single cells and in large clusters. IR bombesin was rarely found in bronchioles of fetuses in the first trimester, but by the second trimester K-like cells were readily identified in bronchioles, and a few were seen in alveolar ducts and bronchi. They were especially numerous in infants dying with post-respirator lung disease. IR calcitonin was not found until 20 weeks' gestation, and was also most common in post-respirator lung disease. The role of these hormones in the fetal and neonatal lung is at present unknown.
M Stahlman, and
M E Grey, and
A G Kasselberg
May 1986,
Archives of pathology & laboratory medicine,
M Stahlman, and
M E Grey, and
A G Kasselberg
January 1985,
Pediatric pulmonology,
M Stahlman, and
M E Grey, and
A G Kasselberg
January 1986,
Cell and tissue research,
M Stahlman, and
M E Grey, and
A G Kasselberg
July 1981,
Experientia,
M Stahlman, and
M E Grey, and
A G Kasselberg
January 1988,
The American review of respiratory disease,
M Stahlman, and
M E Grey, and
A G Kasselberg
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Thorax,
M Stahlman, and
M E Grey, and
A G Kasselberg
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Pediatric research,
M Stahlman, and
M E Grey, and
A G Kasselberg
September 1975,
Hormone and metabolic research = Hormon- und Stoffwechselforschung = Hormones et metabolisme,
M Stahlman, and
M E Grey, and
A G Kasselberg
September 1975,
British journal of cancer,
M Stahlman, and
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A G Kasselberg
August 2001,
Pediatric research,
