Cited by 43Sexual Differentiation and DisordersAdrenal Hormones and DisordersGenetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities

The degree of external genitalia virilization in girls with 21-hydroxylase deficiency appears to be influenced by the CAG repeats in the androgen receptor gene

Rocha, Rosana O., Billerbeck, Ana Elisa C., Pinto, Emília M., Melo, Karla F. S., Lin, Chin J., Longui, Carlos A., Mendonca, Berenice B., Bachega, Tânia A. S. S.·2008·Clinical Endocrinology

Abstract

Summary: Background Women with 21‐hydroxylase deficiency present much variability in external genitalia virilization, even among those with similar impairments of 21‐hydroxylase (21OH) activity. Objective To evaluate if the number of CAG (nCAG) repeats of the androgen receptor gene influences the degree of external genitalia virilization in women with CYP21A2 mutations, grouped according to impairment of 21OH activity. Patients The nCAG was determined in 106 congenital adrenal hyperplasia (CAH) patients and in 302 controls. The patients were divided, according to their CYP21A2 genotypes, into Groups A and B, which confer total and severe impairment of 21OH activity, respectively. Methods The inactivation pattern of the X‐chromosome was studied through genomic DNA digestion with Hpa II . The CAG repeat region was amplified by polymerase chain reaction (PCR) and analysed by GeneScan. Results The nCAG and the frequency of severe skewed X‐inactivation did not differ between normal women and patients. The nCAG median in genotype A was 20·7 (IQR 2·3) for Prader I + II, 22·5 (3·6) for Prader III and 21 (2·9) for Prader IV + V ( P < 0·05 for Prader III and Prader IV + V). The nCAG median in genotype B was 21·3 (1·1) for Prader I + II, 20·5 (2·9) for Prader III and 22 (2·8) for Prader IV + V ( P > 0·05). A significant difference was found regarding the nCAG median in patients presenting Prader III from genotypes A and B. Conclusions We observed great variability in the degree of external genitalia virilization in both CYP21A2 genotypes, and we showed that the CAG repeats of the androgen receptor gene influences this phenotypic variability.

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Crossref · 10.1111/j.1365-2265.2007.03023.x

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  • Apart from CAH genes, other genes may modify steroid action, salt balance or androgen sensitivity and affect phenotype.

    “Apart from CAH genes, other genes may modify steroid action, salt balance or androgen sensitivity and affect phenotype.136,137,138”

    From Congenital adrenal hyperplasia (2017) · cites this paper as [138]

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Authors
Rocha, R. O., Billerbeck, A. E. C., Pinto, E. M., Melo, K. F. S., Lin, C. J., Longui, C. A., Mendonca, B. B., & Bachega, T. A. S. S.
Affiliations
Universidade de São Paulo (BR)
Corresponding author
Bachega, Tânia A. S. S.
Venue
Clinical Endocrinology
Publisher
Wiley
Published
2007-07-30
Volume
68
Issue
2
Pages
226-232
ISSN
  • 0300-0664 (ISSN-L)
  • 1365-2265
OpenAlex
W2168058673
Cited by
43
References
46
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2021: 2 · 2020: 1 · 2018: 3 · 2017: 2 · 2016: 3 · 2015: 2 · 2014: 6 · 2013: 2 · 2012: 2
FWCI
1.72
Type
journal article
Language
en
Open access
closed
Locations
  • Clinical Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • Scientific Electronic Library Online (São Paulo Research Foundation, Latin American and Caribbean Center on Health Sciences Information, Conselho Nacional de Desenvolvimento Científico e Tecnológico) (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Sexual Differentiation and Disorders
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Adrenal Hormones and Disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and Clinical Aspects of Sex Determination and Chromosomal Abnormalities
Keywords
21-hydroxylase deficiency, congenital adrenal hyperplasia, androgen receptor gene, CAG repeat, phenotypic variability, X chromosome inactivation
MeSH terms
Adrenal Hyperplasia, Congenital, Female, Genotype, Humans, Male, Receptors, Androgen, Steroid 21-Hydroxylase, Virilism, Trinucleotide Repeats

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