A new heterozygous G duplicate in exon1 (c.100dupG) of gelsolin gene causes Finnish gelsolin amyloidosis in a Chinese family.

OBJECTIVES: In this study, we report a case of Finnish gelsolin amyloidosis (FGA) in a Chinese family.

METHODS: The proband presented with a range of clinical symptoms that included epileptic seizures and multiple lesions in the brain. Whole exome sequencing of the Gelsolin (GSN) gene was performed, and the GSN mutation was identified through comparison with the known human genome sequences using Genetic Testing Intelligent Execution System.

RESULTS: The GSN gene sequencing revealed that a heterozygous G duplicate in exon1 (c.100dupG) of the GSN gene, which caused a frameshift in GSN transcript translation in the proband, his mother and daughter, but his brother did not have it.

CONCLUSION: We presented a new autosomal dominant heterozygous G duplicate mutation in exon1 of GSN gene, leading to FGA in a Chinese family.