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Journal of Histochemistry and Cytochemistry, Vol. 46, 955-962, August 1998, Copyright © 1998, The Histochemical Society, Inc.

ARTICLE

Temporal–Spatial Distribution of Hepatocyte Nuclear Factor-3ß in Developing Human Lung and Other Foregut Derivatives

Mildred T. Stahlmana, Mary E. Grayb, and Jeffrey A. Whitsettc
a Division of Neonatology, Departments of Pediatrics, Children's Hospital Medical Center, Cincinnati, Ohio
b Pathology, Children's Hospital Medical Center, Cincinnati, Ohio
c Vanderbilt University School of Medicine, Nashville, Tennessee, and Division of Neonatology and Pulmonary Biology, Children's Hospital Medical Center, Cincinnati, Ohio

Correspondence to: Mildred T. Stahlman, Vanderbilt U. Medical Center, Dept. of Pediatrics/Div. of Neonatology, A-0109 Medical Center North, Nashville, TN 37232-2370.

We assessed the temporal–spatial distribution of hepatocyte nuclear factor-3ß (HNF-3ß) in developing human lung and other foregut derivatives. Tissue from 31 fetuses (10–40 weeks) and 24 infants with hyaline membrane disease (HMD) or bronchopulmonary dysplasia (BPD) (2 days to 7 months) was studied. HNF-3ß was detected in nuclei of epithelial cells of trachea and of conducting and terminal airways at 10 weeks. Thereafter, epithelial nuclei were immunolabeled more widely in peripheral than proximal airways. HNF-3ß was confined to bronchiolo–alveolar portals and Type II cells in nonfetal lung. In infants with BPD, HNF-3ß was expressed abundantly in regenerating epithelial cells at the periphery of lung lobules. HNF-3ß was also detected in fetal esophagus, pancreas, duodenum, stomach, and gallbladder, suggesting that it is a marker for progenitor cells in foregut derivatives. The pattern of expression of HNF-3ß in the lung was similar to that of thyroid transcription factor-1 (TTF-1) at all ages. The temporal–spatial patterns of HNF-3ß and TTF-1 in the developing and regenerating lung are consistent with their proposed role in epithelial cell differentiation, regeneration, and surfactant protein gene expression. (J Histochem Cytochem 46:955–962, 1998)

Key Words: TTF-1, surfactant-associated proteins, CCSP, regenerating lung


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