Spectrum of ARSA mutations in Iranian patients with metachromatic leukodystrophy.

Metachromatic leukodystrophy (MLD) is an autosomal recessive disorder caused by mutations in the arylsulfatase A (ARSA) gene. Few studies have assessed the spectrum of ARSA mutations among Iranian patients. Here, we report eight Iranian patients with clinical features of MLD. Whole exome sequencing led to identification of the underlying mutation in ARSA gene in these patients. Among identified mutations was the recurrent c.938G > C (p.R313P) mutation in exon 5 of this gene, showing its relatively high frequency among Iranians. The results of this study helps in design of population-specific panels for screening purposes in order to decrease the burden of MLD.