Identification of a novel mutation in the ALDOB gene in hereditary fructose intolerance

Abstract

Objectives: Hereditary fructose intolerance (HFI) is caused by aldolase B enzyme deficiency. There has been no report about HFI from Iran and the type of mutations has not been reported in the Iranian population so far.

Case presentation: Herein we report a 2 year old girl presented with failure to thrive, hepatomegaly, and liver dysfunction. The primary impression has been hepatic glycogen storage disease type 1 or 6. This diagnosis was not confirmed by laboratory data and liver biopsy. Therefore, targeted-gene sequencing (TGS) covering 450 genes involved in inborn errors in metabolic diseases was performed. The results of TGS showed a rare novel homozygous pathogenic variant c.944del (p.Gly315ValfsTer15) in the ALDOB gene.

Conclusions: This report introduces a novel variant that expands the mutational spectrum of the ALDOB gene in patients with HFI.

Keywords: hereditary fructose intolerance; targeted gene sequencing; variant ALDOB.