Abstract
The ligand Netrin-1 and its receptors DCC and UNC5H2 are critical for the regulation of neuronal migration in nervous system development. Here we demonstrate expression of these molecules in lung development. The mRNA expression profiles of Netrin-1, DCC and UNC5H2 are developmentally regulated during embryonic mouse lung formation. Netrin-1 shows a bimodal expression pattern with elevated mRNA levels early followed by a second peak in late gestation. Peak expression of DCC occurs early in development whereas expression of UNC5H2 peaks late in development. We also demonstrate localization of Netrin-1, DCC and UNC5H2 during the stages of lung development. We present evidence that these proteins are modulated spatially in the mesenchyme and epithelium during lung organogenesis.
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