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Clinical and molecular analysis of isovaleric acidemia patients in the United Arab Emirates reveals remarkable phenotypes and four novel mutations in the IVD gene.

Abstract：

:Isovaleric acidemia (IVA) is an autosomal recessive inborn error of leucine metabolism caused by deficiency of mitochondrial isovaleryl-CoA dehydrogenase (IVD). Accumulation of isovaleryl-CoA derivatives to toxic levels results in clinical symptoms of the disease. Here, we investigate the clinical and molecular features of Arab patients with IVA. Patients from five unrelated families were evaluated clinically and for defects in the IVD gene. Four novel mutations (p.F382fs, p.R392H, p.R395Q and p.E408K) have been identified with p.R395Q occurring in two families. In addition, molecular modeling of the identified missense mutations predicted their damaging effects on the protein and computational analysis of the p.F382fs mutation predicted the disruption of a 3' splicing site resulting in inactive or unstable gene product. Furthermore, we found an unusual case of a 17 years old female homozygous for the p.R392H mutation with no clinical symptoms. Our results illustrate a heterogeneous mutation spectrum and clinical presentation in the relatively small UAE population.

journal_name

Eur J Med Genet

journal_title

European journal of medical genetics

authors

Hertecant JL,Ben-Rebeh I,Marah MA,Abbas T,Ayadi L,Ben Salem S,Al-Jasmi FA,Al-Gazali L,Al-Yahyaee SA,Ali BR

doi

10.1016/j.ejmg.2012.08.001

subject

Has Abstract

pub_date

2012-12-01 00:00:00

pages

671-6

issue

12

eissn

1769-7212

issn

1878-0849

pii

S1769-7212(12)00240-6

journal_volume

55

pub_type

杂志文章

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