Brain phenotypes in two FGFR2 mouse models for Apert syndrome.

Area of Science:

• Developmental biology
• Genetics
• Medical research

Background:

• Apert syndrome (AS) is a craniosynostosis syndrome linked to specific Fibroblast Growth Factor Receptor (FGFR) mutations.
• Nearly all AS cases involve one of two adjacent mutations in the Fgfr2 gene.
• The cranial phenotype includes coronal suture synostosis, but brain abnormalities in AS remain poorly understood.

Purpose of the Study:

• To investigate the primary effects of Apert syndrome-associated Fgfr2 mutations on brain development.
• To challenge the traditional view that brain dysmorphology in AS is secondary to cranial alterations.

Main Methods:

• Utilized novel three-dimensional data.
• Examined inbred mice models at postnatal day 0.
• Focused on mice carrying one of the two common Fgfr2 mutations associated with Apert syndrome.

Main Results:

• The study's data indicate that the brain is primarily affected in Apert syndrome.
• Findings suggest brain dysmorphology is not merely a secondary response to skull malformations.
• The two specific Fgfr2 mutations linked to AS were analyzed for their impact on brain development.

Conclusions:

• The brain, alongside the skull, is likely a primary target in Apert syndrome.
• Shared phenogenetic developmental processes may influence both brain and skull in AS-related craniosynostosis.
• This research reframes the understanding of Apert syndrome's etiology, emphasizing primary brain involvement.