ZFIN ID: ZDB-PUB-170408-3
Evolution of the hypoxia-sensitive cells involved in amniote respiratory reflexes
Hockman, D., Burns, A., Schlosser, G., Gates, K.P., Jevans, B., Mongera, A., Fisher, S., Unlu, G., Knapik, E.W., Kaufman, C.K., Mosimann, C., Zon, L.I., Lancman, J.J., Dong, P.D., Lickert, H., Tucker, A.S., Baker, C.V.
Date: 2017
Source: eLIFE 6: (Journal)
Registered Authors: Dong, P. Duc, Fisher, Shannon, Gates, Keith, Knapik, Ela W., Lancman, Joseph, Mosimann, Christian, Unlu, Gokhan, Zon, Leonard I.
Keywords: chicken, developmental biology, mouse, stem cells, xenopus, zebrafish
MeSH Terms: none
PubMed: 28387645 Full text @ Elife
FIGURES   (current status)
ABSTRACT
The evolutionary origins of the hypoxia-sensitive cells that trigger amniote respiratory reflexes - carotid body glomus cells, and 'pulmonary neuroendocrine cells' (PNECs) - are obscure. Homology has been proposed between glomus cells, which are neural crest-derived, and the hypoxia-sensitive 'neuroepithelial cells' (NECs) of fish gills, whose embryonic origin is unknown. NECs have also been likened to PNECs, which differentiate in situ within lung airway epithelia. Using genetic lineage-tracing and neural crest-deficient mutants in zebrafish, and physical fate-mapping in frog and lamprey, we find that NECs are not neural crest-derived, but endoderm-derived, like PNECs, whose endodermal origin we confirm. We discover neural crest-derived catecholaminergic cells associated with zebrafish pharyngeal arch blood vessels, and propose a new model for amniote hypoxia-sensitive cell evolution: endoderm-derived NECs were retained as PNECs, while the carotid body evolved via the aggregation of neural crest-derived catecholaminergic (chromaffin) cells already associated with blood vessels in anamniote pharyngeal arches.
ADDITIONAL INFORMATION