Abstract
Introduction: The gene Wilms' tumor 1 (WT1) encodes a unique transcription factor. Its defects are known to cause a wide range of complex genitourinary malformations and may contribute to non-syndromic forms of hypospadias. Materials and Methods: We performed WT1 mutation analysis and copy number analysis of WT1-interacting protein in 13 Hungarian patients diagnosed with isolated hypospadias. Results: Sequencing of WT1 revealed a high frequency of heterozygosity for transition 390C-T (5 heterozygotes out of 13 patients, including 2 brothers). WT1-interacting protein had a normal copy number in all patients. Conclusion: Nucleotide substitution 390C-T may play a role in the pathogenesis of non-syndromic hypospadias. The genotype-phenotype correlation should be confirmed by a larger-scale analysis.
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