Precise alternating cellular pattern in the inner ear by coordinated hopping intercalations and delaminations

Roie Cohen, Shahar Taiber, Olga Loza, Shahar Kasirer, Shiran Woland, David Sprinzak

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

The mammalian hearing organ, the organ of Corti, is one of the most organized tissues in mammals. It contains a precisely positioned array of alternating sensory hair cells (HCs) and nonsensory supporting cells. How such precise alternating patterns emerge during embryonic development is not well understood. Here, we combine live imaging of mouse inner ear explants with hybrid mechano-regulatory models to identify the processes that underlie the formation of a single row of inner hair cells (IHCs). First, we identify a previously unobserved morphological transition, termed "hopping intercalation,"that allows cells differentiating toward IHC fate to "hop"under the apical plane into their final position. Second, we show that out-of-row cells with low levels of the HC marker Atoh1 delaminate. Last, we show that differential adhesion between cell types contributes to straightening of the IHC row. Our results support a mechanism for precise patterning based on coordination between signaling and mechanical forces that is likely relevant for many developmental processes.

Original languageEnglish
Article numbereadd2157
JournalScience advances
Volume9
Issue number8
DOIs
StatePublished - Feb 2023

Funding

FundersFunder number
Horizon 2020 Framework Programme
European Research Council
Israel Science Foundation1343/22
Horizon 2020682161

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