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Am J Physiol Lung Cell Mol Physiol 282: L75-L82, 2002;
1040-0605/02 $5.00
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Vol. 282, Issue 1, L75-L82, January 2002

DANCE in developing and injured lung

Jyh-Chang Jean*, Ifeanyi Eruchalu*, Yu Xia Cao, and Martin Joyce-Brady

The Pulmonary Center, Boston University School of Medicine, Boston, Massachusetts 02118

We identified rat developing arteries and neural crest derivatives with multiple epidermal growth factor-like domains (DANCE) as a developmentally regulated gene using suppression-subtractive hybridization. Northern analysis confirmed a fivefold induction of this mRNA transcript between fetal day 18 and 20 that persisted through postnatal day 17. The level was declining at postnatal day 21 and was similar in adult lung to that at fetal day 18. In adults DANCE mRNA abundance was highest in lung, kidney, and spleen, lower in heart, skeletal muscle, and brain, but absent from liver and thymus. It was abundant in pulmonary artery endothelium and a lung epithelial type 2 cell line, barely detectable in vascular smooth muscle, and absent in fibroblasts. In situ hybridization revealed a regulated pattern of expression in endothelial cells of fetal, postnatal, and adult lung. Because DANCE mRNA was inducible in systemic arteries during recovery from injury, we searched for induction in lung injured by hyperoxia. Mouse DANCE mRNA abundance was unchanged during an acute 3-day exposure period, induced threefold 5 days into the recovery phase, and returned to baseline at days 8, 11, and 14. In situ hybridization at day 5 suggested a diffuse pattern of induction. DANCE may play a role in lung endothelial cell biology during development repair after injury.

developing arteries and neural crest derivatives with multiple epidermal growth-like factor domains; development; endothelium

* J.-C. Jean and I. Eruchalu contributed equally to this work.




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