Cranial neural crest (NCC)-derived chondrocyte precursors undergo a dynamic differentiation and maturation process to establish a scaffold for subsequent bone formation, alterations in which contribute to congenital birth defects. Here, we demonstrate that transcription factor and histone methyltransferase proteins Prdm3 and Prdm16 control the differentiation switch of cranial NCCs to craniofacial cartilage. Loss of either paralog results in hypoplastic and unorganized chondrocytes due to impaired cellular orientation and polarity. We show that PRDMs regulate cartilage differentiation by controlling the timing of Wnt/β-catenin activity in strikingly different ways: Prdm3 represses while Prdm16 activates global gene expression, though both by regulating Wnt enhanceosome activity and chromatin accessibility. Finally, we show that manipulating Wnt/β-catenin signaling pharmacologically or generating prdm3-/-;prdm16-/- double mutants rescues craniofacial cartilage defects. Our findings reveal upstream regulatory roles for Prdm3 and Prdm16 in cranial NCCs to control Wnt/β-catenin transcriptional activity during chondrocyte differentiation to ensure proper development of the craniofacial skeleton.
PRDM paralogs antagonistically balance Wnt/β-catenin activity during craniofacial chondrocyte differentiation
Present address: Department of Immunotherapy and Precision Immuno-Oncology, Cleveland Clinic
Present address: Department of Biology, University of Oklahoma School of Medicine
- Award Group:
- Funder(s): National Institute of Dental and Craniofacial Research
- Award Id(s): R01 DE024034
- Funder(s):
- Award Group:
- Funder(s): National Institute of Neurological Disorders and Stroke
- Award Id(s): P30 NS048154
- Funder(s):
- Award Group:
- Funder(s): National Cancer Institute
- Award Id(s): P30 CA046934
- Funder(s):
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Lomeli C. Shull, Ezra S. Lencer, Hyun Min Kim, Susumu Goyama, Mineo Kurokawa, James C. Costello, Kenneth Jones, Kristin B. Artinger; PRDM paralogs antagonistically balance Wnt/β-catenin activity during craniofacial chondrocyte differentiation. Development 2022; dev.200082. doi: https://doi.org/10.1242/dev.200082
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