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AR mutations in 28 patients with androgen insensitivity syndrome (Prader grade 0–3)

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Abstract

We investigated the androgen receptor (AR) gene mutation profiles of Chinese patients exhibiting severe androgen insensitivity syndrome (AIS) phenotypes. The present study enrolled 28 patients with genetically diagnosed AIS, who presented with severe phenotypes (Prader grade 0–3). Patients and some family members were screened via amplification and sequencing of their AR exons 1–8, including the corresponding intronic flanking regions. Luteinizing (LH), follicle-stimulating (FSH), and testosterone (T) hormone levels were found to be slightly, but not significantly, higher in patients with complete androgen insensitivity syndrome (CAIS) than in patients with partial androgen insensitivity syndrome (PAIS) (P>0.05). We identified 24 different AR mutations, including 12 that were novel. Ten patients (cases 2, 3, 10, 28, 11, 12, 19, 20, 24, and 25) were found to carry five recurrent mutations (p.Y572S, p.P914S, p.S176R, p.Y782N, and p.R841H); of these, p.Y572S, p.S176R, and p.Y782N were novel. Among the mutations identified in patients with CAIS, six (66.7%) were characterized as single-nucleotide missense mutations, and six (66.7%) were found to be located in the AR ligand-binding domain (LBD). Among the mutations identified in patients with PAIS, 15 (93.8%) were found to be missense, and 11 (68.8%) were found to be located in the LBD. Patients 10 and 28 were determined to harbor the same missense mutation (p.P914S), but were diagnosed with CAIS and PAIS, respectively. Sex hormone levels were slightly, but not significantly, elevated in patients with CAIS compared to those with PAIS. Missense mutations spanning AR exons 1–8 were the predominant form of identified mutations, and these were mostly located in the AR LBD. Approximately 50% of the identified mutations were novel, and have enriched the AR gene-mutation database. Patients harboring identical mutations were in some instances found to exhibit divergent phenotypes.

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Acknowledgements

The authors thank the patients and families who gave their consent for, and collaborated in this study. This work was supported by the Public Health Project for Residents in Beijing (Z151100003915103), and the National Key Research and Development Program of China (2016YFC0901505).

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  1. Beijing Key Laboratory for Genetics of Birth Defects, Center of Endocrinology, Genetics and Metabolism, Beijing Children’s Hospital, The Capital Medical University, National center for children’s health, Beijing, 100045, China

    Yi Wang, Chunxiu Gong, Xiou Wang & Miao Qin

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  1. Yi Wang
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  2. Chunxiu Gong
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  3. Xiou Wang
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  4. Miao Qin
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Correspondence to Chunxiu Gong.

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Wang, Y., Gong, C., Wang, X. et al. AR mutations in 28 patients with androgen insensitivity syndrome (Prader grade 0–3). Sci. China Life Sci. 60, 700–706 (2017). https://doi.org/10.1007/s11427-017-9084-9

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