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Abstract Organ morphogenesis uses mechanotransduction feedback loops to convert forces into gene expression changes that regulate cell mechanics. How these loops integrate with developmental programs to ensure robust outcomes remains unclear. We show that Yap mechanotransduction establishes a self-limiting positive feedback loop for semicircular canal formation in zebrafish. Canal development proceeds through bud initiation, extension, and fusion within the otic epithelium.
Abstract During inner ear semicircular canal morphogenesis in zebrafish, patterned canal-genesis zones express genes for extracellular matrix component synthesis. These include hyaluronan and the hyaluronan-binding chondroitin sulfate proteoglycan Versican, which are abundant in the matrices of many developing organs. Charged hyaluronate polymers play a key role in canal morphogenesis through osmotic swelling.
Alsina B. Whitfield T.T. Sculpting the labyrinth: Morphogenesis of the developing inner ear. Semin. Cell Dev. Biol. 2017; 65: 47-59 Alt S. Ganguly P. Salbreux G. Vertex models: from cell mechanics to tissue morphogenesis. Philos. Trans. R. Soc. Lond. B Biol. Sci. 2017; 372: 20150520 Barriga E.H. Franze K. Charras G. Mayor R. Tissue stiffening coordinates morphogenesis by triggering collective cell migration in vivo. Nature. 2018; 554: 523-527 Behrndt M. Salbreux G. Campinho P. Hauschild R. Oswald F. Roensch J.
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