Dysregulation of locus coeruleus development in congenital central hypoventilation syndrome

Nobuta, H.; Cilio, M. R.; Danhaive, O.; Tsai, H. H.; Tupal, S.; Chang, S. M.; Murnen, A.; Kreitzer, F.; Bravo, V.; Czeisler, C.; Gokozan, H. N.; Gygli, P.; Bush, S.; Weese-Mayer, D. E.; Conklin, B.; Yee, S. P.; Huang, E. J.; Gray, P. A.; Rowitch, D.; Otero, J. J.

Acta Neuropathol. 2015 May 16; 130(2):171-83

Abstract

Human congenital central hypoventilation syndrome (CCHS), resulting from mutations in transcription factor PHOX2B, manifests with impaired responses to hypoxemia and hypercapnia especially during sleep. To identify brainstem structures developmentally affected in CCHS, we analyzed two postmortem neonatal-lethal cases with confirmed polyalanine repeat expansion (PARM) or Non-PARM (PHOX2B8) mutation of PHOX2B. Both human cases showed neuronal losses within the locus coeruleus (LC), which is important for central noradrenergic signaling. Using a conditionally active transgenic mouse model of the PHOX2B8 mutation, we found that early embryonic expression (

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