Mice bearing deletions of retinoic acid receptors demonstrate reduced lung elastin and alveolar numbers.

Abstract excerpt

In mammals, including rats and mice, the development of pulmonary alveolar septa is primarily limited to late gestation and the early periods of postnatal life. Before this time, the rat lung contains a relatively large supply of endogenous retinyl ester that, together with its metabolite retinoic acid, has been shown to increase elastin gene expression and the number of alveoli. We have hypothesized that mice...

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