ARIX and PHOX2B polymorphisms in patients with congenital superior oblique muscle palsy

Yan Jiang, Toshihiko Matsuo, Hirotake Fujiwara, Satoshi Hasebe, Hiroshi Ohtsuki, Tatsuji Yasuda

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

To identify ARIX gene and PHOX2B gene polymorphisms in patients with congenital superior oblique muscle palsy, 3 exons of the ARIX gene and PHOX2B gene were sequenced by genomic DNA amplification with polymerase chain reaction (PCR) and direct sequencing in 31 patients with congenital superior oblique muscle palsy and in 54 normal individuals. A family with a father and one daughter each having congenital superior oblique muscle palsy was also included in this study. Eleven patients with congenital superior oblique muscle palsy had heterozygous nucleotide changes in the ARIX gene, including 4 patients reported on previously. One patient with atrophy of the superior oblique muscle had a new change of T-4G in the promoter region of the ARIX gene. The other 6 patients had a heterozygous nucleotide change of G153A in the 5′-untranslated region (UTR) of the exon 1 of the ARIX gene. These nucleotide changes of the ARIX gene, taken together, had a significant association with congenital superior oblique muscle palsy (P = 0.0022). One patient and 5 patients had heterozygous nucleotide changes of A1106 C and A1121 C in exon 3 of the PHOX2B gene, respectively, while these changes were absent in the normal individuals. Two patients had both the G153A change in the 5′-UTR of exon 1 of the ARIX gene and the A1121 C change in exon 3 of the PHOX2B gene. In conclusion, the polymorphisms of the ARIX gene and PHOX2B gene may be genetic risk factors for the development of congenital superior oblique muscle palsy. Copyright

Original languageEnglish
Pages (from-to)55-62
Number of pages8
JournalActa medica Okayama
Volume59
Issue number2
Publication statusPublished - Apr 2005

Keywords

  • ARIX
  • Congenital fibrosis of the extraocular muscles (CFEOM)
  • Congenital superior oblique muscle palsy
  • PHOX2B
  • Polymorphism

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)

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