Depolarization induces calcium-dependent BMP4 release from mouse embryonic palate mesenchymal cells

Mikaela L. Follmer, Trevor J. Isner, Yunus H. Ozekin, Claire H. Levitt, Carolyn L. Burek, Richard K. P. Benninger and Emily Anne Bates ()
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Mikaela L. Follmer: University of Colorado Anschutz Medical Campus
Trevor J. Isner: University of Colorado Anschutz Medical Campus
Yunus H. Ozekin: University of Colorado Anschutz Medical Campus
Claire H. Levitt: University of Colorado Denver Anschutz Medical Campus
Carolyn L. Burek: University of Colorado Anschutz Medical Campus
Richard K. P. Benninger: University of Colorado Denver Anschutz Medical Campus
Emily Anne Bates: University of Colorado Anschutz Medical Campus

Nature Communications, 2024, vol. 15, issue 1, 1-19

Abstract: Abstract Bone Morphogenetic Protein (BMP) signaling is essential for craniofacial development, though little is known about the mechanisms that govern BMP secretion. We show that depolarization induces calcium-dependent BMP4 release from mouse embryonic palate mesenchyme. We show endogenous transient changes in intracellular calcium occur in cranial neural crest cells, the cells from which embryonic palate mesenchyme derives. Waves of transient changes in intracellular calcium suggest that these cells are electrically coupled and may temporally coordinate BMP release. These transient changes in intracellular calcium persist in palate mesenchyme cells from embryonic day 9.5 to 13.5 mice. Disruption of a potassium channel called Kcnj2 significantly decreases the amplitude of calcium transients and the ability of cells to secrete BMP. Kcnj2 knockout mice have cleft palate and reduced BMP signaling. Our data suggest that temporal control of developmental cues is regulated by ion channels, depolarization, and intracellular calcium for mammalian craniofacial morphogenesis.

Date: 2024
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DOI: 10.1038/s41467-024-53642-2

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