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Updated: Jan 11, 2026
09:16
Analyzing Craniofacial Morphogenesis in Zebrafish Using 4D Confocal Microscopy
Published on: January 30, 2014
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Neanderthal-derived variants increase SOX9 enhancer activity in craniofacial progenitors that shape jaw development
Kirsty Uttley1, Hannah J Jüllig1, Carlo De Angelis1
1MRC Human Genetics Unit, Institute of Genetics and Cancer, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XU, UK.
Development (Cambridge, England)
|November 10, 2025
Summary
Neanderthal variants in a facial development gene enhancer (EC1.45) increased its activity. This suggests Neanderthal genetic contributions may have influenced subtle human craniofacial morphology and evolution.
Area of Science:
- Evolutionary biology
- Genetics
- Developmental biology
Background:
- Human facial appearance is highly variable due to genetic factors.
- Deletions near the SOX9 gene enhancer (EC1.45) cause Pierre Robin sequence, affecting jaw and palate development.
Purpose of the Study:
- Investigate if single nucleotide variants within EC1.45 influence subtle facial form alterations.
- Examine the functional impact of three Neanderthal-derived variants on EC1.45 activity.
Main Methods:
- Utilized zebrafish dual enhancer-reporter assays to assess EC1.45 activity.
- Analyzed Neanderthal-derived variants' effects on enhancer function in neural crest progenitor cells.
- Overexpressed SOX9 in EC1.45-active cells to observe effects on craniofacial precursors.
Main Results:
- Observed higher activity of Neanderthal EC1.45 in neural crest progenitor cells during a key developmental window.
- Identified EC1.45-active cells are transcriptionally related to craniofacial skeletal precursors.
- SOX9 overexpression led to expanded cartilaginous precursor volume.
Conclusions:
- Neanderthal-derived variants can increase regulatory activity of a disease-associated enhancer (EC1.45).
- This regulatory change has potential implications for craniofacial morphology across human evolution.
- Suggests a role for Neanderthal genetic contributions in shaping human facial development.
Keywords:
Cranial neural crest cellsCraniofacial developmentGene regulationMorphological divergenceNeanderthal variantsTranscriptional enhancerMore Related Videos
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