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

Interferon-gamma regulation of Clara cell gene expression: in vivo and in vitro.

This report demonstrates that Clara cell 10-kDa protein (CC10) mRNA levels are regulated by interferon-gamma (IFN-gamma). An analysis of total lung RNA from mice given IFN-gamma intratracheally showed increased levels of CC10 mRNA compared to control animals but no significant increases in surfactant proteins B and C. These results were confirmed in a Clara cell line, mtCC1-2, generated from the lungs of a transgenic mouse expressing the SV40 large T antigen under the control of a Clara cell-specific promoter. Significant increases in mtCC1-2 CC10 mRNA levels were observed in a time- and a dose-dependent manner. The expression of transacting factors hepatocyte nuclear factors 3 alpha and 3 beta (HNF-3 alpha and HNF-3 beta) were also analyzed, and a transient increase in the expression of HNF-3 beta but not HNF-3 alpha was detected. Deoxyribonuclease I footprint analysis identified a signal transducer and activator of transcription (STAT) binding site (at nucleotides -293 to -284 of CC10) adjacent to two thyroid transcription factor-1 ( TTF-1) binding sites, suggesting a potential interaction between STAT1 and TTF-1. This report reinforces the hypothesis that CC10 functions as an anti-inflammatory protein and that increases in CC10 protein may provide additional protection from inflammation and disease in the lung.[1]


  1. Interferon-gamma regulation of Clara cell gene expression: in vivo and in vitro. Magdaleno, S.M., Wang, G., Jackson, K.J., Ray, M.K., Welty, S., Costa, R.H., DeMayo, F.J. Am. J. Physiol. (1997) [Pubmed]
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