A novel R275X mutation of the SLC25A15 gene in a Japanese patient with the HHH syndrome

Hiroyuki Torisu, Ryutaro Kira, Naomi Kanazawa, Megumi Takemoto, Masafumi Sanefuji, Yasunari Sakai, Seiichi Tsujino, Toshiro Hara

Research output: Contribution to journalArticle

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Abstract

The hyperornithinemia-hyperammonemia-homocitrullinuria (HHH) syndrome (MIM 238970) is an autosomal recessive metabolic disorder caused by a deficiency of the mitochondrial ornithine transporter, one of the urea cycle components. Mutations in the SLC25A15 gene have been coupled to the HHH syndrome. We describe a Japanese female patient with the HHH syndrome due to a novel homozygous R275X SLC25A15 mutation and male sibling who presumably carried the same mutation. He exhibited slowly progressive deterioration with seizures, a gait disturbance due to polyneuropathy, episodic confusion, and died of acute encephalopathy at 34 years of age while the proband exhibited moderate mental retardation, seizures, mild spastic paraplegia, and deafness without neurological deterioration for more than 20 years. The clinical features of previously documented patients with the homozygous SLC25A15 mutation demonstrated that genotype did not simply correlate with clinical severity. The phenotypic variability might depend on other factors, such as dietary and other genetic ones.

Original languageEnglish
Pages (from-to)332-335
Number of pages4
JournalBrain and Development
Volume28
Issue number5
DOIs
Publication statusPublished - Jun 1 2006

Fingerprint

Mutation
Genes
Seizures
Confusion
Polyneuropathies
Paraplegia
Brain Diseases
Deafness
Gait
Intellectual Disability
Urea
Siblings
Genotype
HHH syndrome
ornithine transporter

All Science Journal Classification (ASJC) codes

  • Pediatrics, Perinatology, and Child Health
  • Developmental Neuroscience
  • Clinical Neurology

Cite this

A novel R275X mutation of the SLC25A15 gene in a Japanese patient with the HHH syndrome. / Torisu, Hiroyuki; Kira, Ryutaro; Kanazawa, Naomi; Takemoto, Megumi; Sanefuji, Masafumi; Sakai, Yasunari; Tsujino, Seiichi; Hara, Toshiro.

In: Brain and Development, Vol. 28, No. 5, 01.06.2006, p. 332-335.

Research output: Contribution to journalArticle

Torisu, H, Kira, R, Kanazawa, N, Takemoto, M, Sanefuji, M, Sakai, Y, Tsujino, S & Hara, T 2006, 'A novel R275X mutation of the SLC25A15 gene in a Japanese patient with the HHH syndrome', Brain and Development, vol. 28, no. 5, pp. 332-335. https://doi.org/10.1016/j.braindev.2005.10.002
Torisu, Hiroyuki ; Kira, Ryutaro ; Kanazawa, Naomi ; Takemoto, Megumi ; Sanefuji, Masafumi ; Sakai, Yasunari ; Tsujino, Seiichi ; Hara, Toshiro. / A novel R275X mutation of the SLC25A15 gene in a Japanese patient with the HHH syndrome. In: Brain and Development. 2006 ; Vol. 28, No. 5. pp. 332-335.
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