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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

HNF-3/forkhead homologue-4 (HFH-4) is expressed in ciliated epithelial cells in the developing mouse lung.

HNF-3/forkhead homologue-4 (HFH-4), a transcription factor of the winged-helix/forkhead family, was detected by immunohistochemistry in tissue of the developing mouse. HFH-4 protein was present in epithelial cells of the lung, trachea, oviduct, and embryonic esophagus, and in ependymal cells lining the spinal column and ventricles of the brain. In lung, trachea, and nose, HFH-4 was expressed in a distinct subset of epithelial cells that also expressed beta-tubulin IV, a ciliated cell marker. Cellular sites of HFH-4 and beta-tubulin IV expression were distinct from that of Clara cell secretory protein (CCSP), which was detected in nonciliated epithelial cells in the conducting airway of the lung. HFH-4 and beta-tubulin IV, but not CCSP, were detected in the respiratory epithelium of thyroid transcription factor-1 (TTF-1) gene-targeted mice. The presence of HFH-4 and beta-tubulin IV in TTF-1 gene-targeted mice demonstrates that differentiation of ciliated epithelium does not require TTF-1. Co-localization of HFH-4 and beta-tubulin IV staining in various tissues during mouse development supports a role for HFH-4 in the differentiation of ciliated cell lineages.[1]


  1. HNF-3/forkhead homologue-4 (HFH-4) is expressed in ciliated epithelial cells in the developing mouse lung. Tichelaar, J.W., Wert, S.E., Costa, R.H., Kimura, S., Whitsett, J.A. J. Histochem. Cytochem. (1999) [Pubmed]
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