Glutaric aciduria type 1 in Korea: report of two novel mutations
Authors
June Dong Park ; ByungChan Lim ; Ki Joong Kim ; Yong Seung Hwang ; Seung Ki Kim ; Seong-Ho Kang ; Sung Im Cho ; Sung Sup Park ; Joon Soo Lee ; Jong Hee Chae
Citation
JOURNAL OF KOREAN MEDICAL SCIENCE, Vol.25(6) : 957-960, 2010
Alleles ; Amino Acid Metabolism, Inborn Errors/genetics* ; Amino Acid Substitution ; Child, Preschool ; Female ; Glutaryl-CoA Dehydrogenase/deficiency* ; Glutaryl-CoA Dehydrogenase/genetics* ; Heterozygote ; Humans ; Infant ; Magnetic Resonance Imaging ; Male ; Mutation ; Republic of Korea ; Sequence Analysis, DNA
Keywords
Glutaric Aciduria Type I ; Glutaryl-CoA Dehydrogenase ; Korea ; Mutation
Abstract
Glutaric aciduria type I (GA I) is an autosomal recessive disorder caused by a deficiency of glutaryl-CoA dehydrogenase. Although over 400 patients confirmed as GA I have been reported, reports from the Asian population had contributed to the minor proportion. We recently diagnosed two cases of GA I confirmed with mutational analysis. Here, we present their rather atypical clinical presentations with genetic characteristics for the first time in Korea. Profound developmental delay from birth, association of hearing loss, and neurological improvement after surgical intervention, were considered to be different clinical features from most reported cases. One patient was a compound heterozygote for p.Ser139Leu and p.Asp220Tyr, and the other for p.Ser139Leu and Glu160X. The mutations of the two alleles (p.Asp220Tyr and p.Glu160X) were novel and reports of p.Ser139Leu were rare both in Western and other Asian populations. These might suggest different genetic spectrum of Korean GA I patients.