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Three novel PAX6 mutations in patients with aniridia
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  1. W Zumkeller1,
  2. U Orth2,
  3. A Gal2
  1. 1Department of Paediatrics, Martin-Luther-University, University Hospital, Ernst-Grube-Str. 40, 06097 Halle/Saale, Germany
  2. 2Department of Human Genetics, University Hospital Eppendorf, Martinstr. 52, 20246 Hamburg, Germany
  1. Correspondence to:
 Dr W Zumkeller, Martin-Luther-University Halle-Wittenberg, University Hospital, Department of Paediatrics, Ernst-Grube-Str. 40, 06097 Halle/Saale, Germany;
 walter.zumkeller{at}medizin.uni-halle.de

Abstract

Aims: To describe mutations in the PAX6 gene in five patients with aniridia from three unrelated families.

Methods: The PAX6 gene was analysed using single stranded conformational polymorphism analysis and direct sequencing.

Results: In one family, three individuals from two generations had aniridia, whereas in each of the other families only one member was affected. The first patient had the heterozygous Q221X (1023C → T) nonsense mutation in exon 8. The same mutation was found in his mother and sister. Another patient had a heterozygous Q297X (1252C → T) mutation in exon 10. The third patient carried a heterozygous IVS5+2T → C mutation leading to aberrant splicing of mRNA.

Conclusions: These findings provide further examples of haploinsufficiency of PAX6 in aniridia.

  • aniridia
  • PAX6 mutations
  • eye malformations
  • PCR, polymerase chain reaction
  • SSCP, single stranded conformational polymorphism
  • WAGR, Wilms’s tumour, aniridia, genitourinary abnormalities, and mental retardation
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