Genetic Influence on Neurodevelopment in Nonsyndromic Craniosynostosis
Andrew T Timberlake1, Alexandra Junn1, Roberto Flores1
1From the Hansjörg Wyss Department of Plastic Surgery, New York University Langone Health; Department of Surgery, Division of Plastic Surgery, Yale School of Medicine; and Laboratory of Human Genetics and Genomics, The Rockefeller University.
Plastic and Reconstructive Surgery
|March 14, 2022
Summary
Genetic mutations significantly increase neurodevelopmental delays in children with nonsyndromic craniosynostosis. These findings highlight a genetic link impacting both brain development and skull formation.
Area of Science:
- Genetics
- Neuroscience
- Craniofacial Surgery
Background:
- Nonsyndromic craniosynostosis is a common condition requiring craniofacial surgery.
- Nearly half of affected children experience neurocognitive deficits despite surgical treatment.
- The genetic basis for neurodevelopmental issues in these patients remains largely unexplored.
Purpose of the Study:
- To investigate the role of de novo mutations in neurodevelopmental outcomes for nonsyndromic craniosynostosis.
- To identify specific genetic factors influencing cognitive deficits in affected children.
Main Methods:
- Whole-exome sequencing was performed on 404 case-parent trios with sporadic nonsyndromic craniosynostosis.
- De novo mutation burden was statistically compared between cases and healthy controls.
- Neurodevelopmental delays and intellectual disability were analyzed in relation to mutation status.
Main Results:
- A significant burden of damaging de novo mutations in mutation-intolerant genes was found in probands.
- Children with these mutations showed a two-fold higher incidence of neurodevelopmental delay and a 20-fold higher incidence of intellectual disability.
- Transmitted loss-of-function mutations in high-pLI genes also increased the risk of neurodevelopmental delay.
Conclusions:
- Genetic lesions affecting both neurodevelopment and cranial morphogenesis contribute to nonsyndromic craniosynostosis.
- These findings reveal a strong genetic influence on neurodevelopmental outcomes in affected children.
- Identifying these genetic factors may aid in personalizing surgical intervention strategies.
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