Truncating mutation in NFIA causes brain malformation and urinary tract defects

Area of Science:

• Genetics
• Developmental Biology
• Medical Genetics

Background:

• Chromosome 1p32-p31 deletion syndrome is associated with corpus callosum anomalies and urinary tract defects.
• The Nuclear factor I/A (NFIA) gene is located in the critical region and is implicated in this syndrome.

Purpose of the Study:

• To investigate the genetic basis of a patient presenting with features consistent with 1p32-p31 deletion syndrome.
• To confirm the role of the NFIA gene in the pathogenesis of this syndrome.

Main Methods:

• Case report of a patient with 1p32-p31 deletion syndrome-like features.
• Genetic analysis to identify mutations in the NFIA gene.

Main Results:

• A de novo truncating mutation (c.1094delC; p.Pro365Hisfs*32) was identified in the NFIA gene.
• This mutation leads to haploinsufficiency of the NFIA gene.

Conclusions:

• Haploinsufficiency of the NFIA gene is a primary cause of 1p32-p31 deletion syndrome.
• This finding expands the understanding of NFIA gene function in development and disease.