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Dev Cell. 2015 Aug 10;34(3):267-82. doi: 10.1016/j.devcel.2015.05.025. Epub 2015 Jul 16.

Regeneration of Sensory Hair Cells Requires Localized Interactions between the Notch and Wnt Pathways.

Author information

1
Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, UT 84132, USA.
2
Stowers Institute for Medical Research, Kansas City, MO 64110, USA.
3
Stowers Institute for Medical Research, Kansas City, MO 64110, USA; Department of Neurobiology and Anatomy, University of Utah, Salt Lake City, UT 84132, USA. Electronic address: pio@stowers.org.

Abstract

In vertebrates, mechano-electrical transduction of sound is accomplished by sensory hair cells. Whereas mammalian hair cells are not replaced when lost, in fish they constantly renew and regenerate after injury. In vivo tracking and cell fate analyses of all dividing cells during lateral line hair cell regeneration revealed that support and hair cell progenitors localize to distinct tissue compartments. Importantly, we find that the balance between self-renewal and differentiation in these compartments is controlled by spatially restricted Notch signaling and its inhibition of Wnt-induced proliferation. The ability to simultaneously study and manipulate individual cell behaviors and multiple pathways in vivo transforms the lateral line into a powerful paradigm to mechanistically dissect sensory organ regeneration. The striking similarities to other vertebrate stem cell compartments uniquely place zebrafish to help elucidate why mammals possess such low capacity to regenerate hair cells.

PMID:
26190147
PMCID:
PMC4557215
DOI:
10.1016/j.devcel.2015.05.025
[Indexed for MEDLINE]
Free PMC Article

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