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Androgen receptor genotyping in a large Australasian cohort with androgen insensitivity syndrome; identification of four novel mutations

By Y. W. A. Jeske, I. N. McGown, D. M. Cowley, C. Oley, M. J. Thomsett, C. S. Y. Choong and A. M. Cotterill


We genotyped the androgen receptor (AR) gene in 31 Australasian patients with androgen insensitivity syndrome (AIS). The entire coding region of AR was examined including analysis of polymorphic CAG and GGN repeats in all patients. AR defects were found in 66.7% (6/9) of patients with complete AIS (CAIS) and 13.6% (3/22) of patients with partial AIS (PAIS). A novel deletion (N858delG) leading to a premature stop codon was found in CAIS patient P1. CAIS patient P2 has a novel deletion (N2676delGAGT) resulting in a stop at codon 787. These mutations would result in inactivation of AR protein. A novel insertion of a cysteine residue in the first zinc finger of the AR DNA-binding domain (N2045_2047dupCTG) was found in CAIS patient P3. PAIS patient P4 has a novel amino acid substitution (Arg760Ser) in the AR ligand binding domain, which may impair ligand binding. Five patients were found to have previously reported AR mutations and no mutations were identified in the remaining patients

Topics: androgen insensitivity syndrome (AIS), androgen receptor (AR), mutation, human, paediatric, Ligand-Binding Domain, Prostate-Cancer Risk, Complete Testicular Feminization, Cag Repeat Length, Male-Infertility, Trinucleotide Repeat, Gene-Mutations, Polyglutamine Tracts, Molecular Markers, Glycine Repeats
Year: 2007
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