Altered CYP21 genes in HLA-haplotypes associated with congenital adrenal hyperplasia (CAH): a family study

Burkhard J. Manfras, Michael Swinyard, William A. Rudert, Edward J. Ball, Peter Lee, Peter Kühnl, Massimo Trucco, Bernhard O. Böhm

Research output: Contribution to journalArticle

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Abstract

Disorders of the CYP21 gene, which is located within the major histocompatibility complex on the short arm of chromosome 6, are the leading causes of congenital adrenal hyperplasia (CAH). The coding gene and a highly homologous pseudogene are tandemly arranged with the two genes for the fourth component of complement (C4A and C4B). To analyse the prevalence rates of mutations of the CYP21 genes and the segregation of the CYP21 genes with their corresponding human leucocyte antigen (HLA)-haplotypes, 21 families with one or two children with the severe form of 21-hydroxylase deficiency were studied. Mutations of the CYP21 gene on their corresponding HLA-haplotype were detected by hybridisation of polymerase chain reaction (PCR)-amplified genomic DNA with sequence-specific oligonucleotides and solid phase direct sequencing. Our study has shown the following. (1) A single basepair mutation (A→G or C→G) within the second intron is the most frequent mutation leading to impaired 21-hydroxylase activity. This mutation is only detected in HLA-haplotypes associated with the salt-wasting form of CAH. (2) A large deletion of part or all of the CYP21 gene is associated with the HLA-haplotype A3, BW47, C6, DR7, DR53, DQ2 but is also observed in other HLA-haplotypes and can be detected by a simple rapid PCR restriction fragment length polymorphism method. (3) Two alleles of the coding CYP21 gene differing in a leucine codon within the first exon, (formerly described as a mutation associated with 21-hydroxylase deficiency) have been found with an equal distribution in patients with 21-hydroxylase deficiency, non-disease HLA-haplotypes and the local healthy controls.

Original languageEnglish (US)
Pages (from-to)33-39
Number of pages7
JournalHuman Genetics
Volume92
Issue number1
DOIs
StatePublished - Aug 1 1993

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Congenital Adrenal Hyperplasia
HLA Antigens
Haplotypes
Genes
Mutation
Gene Components
Deficiency Diseases
Steroid 21-Hydroxylase
Polymerase Chain Reaction
Pseudogenes
Chromosomes, Human, Pair 6
Mutation Rate
Major Histocompatibility Complex
Codon
Leucine
Oligonucleotides
Restriction Fragment Length Polymorphisms
Introns
Exons
Salts

All Science Journal Classification (ASJC) codes

  • Genetics
  • Genetics(clinical)

Cite this

Manfras, B. J., Swinyard, M., Rudert, W. A., Ball, E. J., Lee, P., Kühnl, P., ... Böhm, B. O. (1993). Altered CYP21 genes in HLA-haplotypes associated with congenital adrenal hyperplasia (CAH): a family study. Human Genetics, 92(1), 33-39. https://doi.org/10.1007/BF00216142
Manfras, Burkhard J. ; Swinyard, Michael ; Rudert, William A. ; Ball, Edward J. ; Lee, Peter ; Kühnl, Peter ; Trucco, Massimo ; Böhm, Bernhard O. / Altered CYP21 genes in HLA-haplotypes associated with congenital adrenal hyperplasia (CAH) : a family study. In: Human Genetics. 1993 ; Vol. 92, No. 1. pp. 33-39.
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abstract = "Disorders of the CYP21 gene, which is located within the major histocompatibility complex on the short arm of chromosome 6, are the leading causes of congenital adrenal hyperplasia (CAH). The coding gene and a highly homologous pseudogene are tandemly arranged with the two genes for the fourth component of complement (C4A and C4B). To analyse the prevalence rates of mutations of the CYP21 genes and the segregation of the CYP21 genes with their corresponding human leucocyte antigen (HLA)-haplotypes, 21 families with one or two children with the severe form of 21-hydroxylase deficiency were studied. Mutations of the CYP21 gene on their corresponding HLA-haplotype were detected by hybridisation of polymerase chain reaction (PCR)-amplified genomic DNA with sequence-specific oligonucleotides and solid phase direct sequencing. Our study has shown the following. (1) A single basepair mutation (A→G or C→G) within the second intron is the most frequent mutation leading to impaired 21-hydroxylase activity. This mutation is only detected in HLA-haplotypes associated with the salt-wasting form of CAH. (2) A large deletion of part or all of the CYP21 gene is associated with the HLA-haplotype A3, BW47, C6, DR7, DR53, DQ2 but is also observed in other HLA-haplotypes and can be detected by a simple rapid PCR restriction fragment length polymorphism method. (3) Two alleles of the coding CYP21 gene differing in a leucine codon within the first exon, (formerly described as a mutation associated with 21-hydroxylase deficiency) have been found with an equal distribution in patients with 21-hydroxylase deficiency, non-disease HLA-haplotypes and the local healthy controls.",
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Manfras, BJ, Swinyard, M, Rudert, WA, Ball, EJ, Lee, P, Kühnl, P, Trucco, M & Böhm, BO 1993, 'Altered CYP21 genes in HLA-haplotypes associated with congenital adrenal hyperplasia (CAH): a family study', Human Genetics, vol. 92, no. 1, pp. 33-39. https://doi.org/10.1007/BF00216142

Altered CYP21 genes in HLA-haplotypes associated with congenital adrenal hyperplasia (CAH) : a family study. / Manfras, Burkhard J.; Swinyard, Michael; Rudert, William A.; Ball, Edward J.; Lee, Peter; Kühnl, Peter; Trucco, Massimo; Böhm, Bernhard O.

In: Human Genetics, Vol. 92, No. 1, 01.08.1993, p. 33-39.

Research output: Contribution to journalArticle

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T1 - Altered CYP21 genes in HLA-haplotypes associated with congenital adrenal hyperplasia (CAH)

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AU - Manfras, Burkhard J.

AU - Swinyard, Michael

AU - Rudert, William A.

AU - Ball, Edward J.

AU - Lee, Peter

AU - Kühnl, Peter

AU - Trucco, Massimo

AU - Böhm, Bernhard O.

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N2 - Disorders of the CYP21 gene, which is located within the major histocompatibility complex on the short arm of chromosome 6, are the leading causes of congenital adrenal hyperplasia (CAH). The coding gene and a highly homologous pseudogene are tandemly arranged with the two genes for the fourth component of complement (C4A and C4B). To analyse the prevalence rates of mutations of the CYP21 genes and the segregation of the CYP21 genes with their corresponding human leucocyte antigen (HLA)-haplotypes, 21 families with one or two children with the severe form of 21-hydroxylase deficiency were studied. Mutations of the CYP21 gene on their corresponding HLA-haplotype were detected by hybridisation of polymerase chain reaction (PCR)-amplified genomic DNA with sequence-specific oligonucleotides and solid phase direct sequencing. Our study has shown the following. (1) A single basepair mutation (A→G or C→G) within the second intron is the most frequent mutation leading to impaired 21-hydroxylase activity. This mutation is only detected in HLA-haplotypes associated with the salt-wasting form of CAH. (2) A large deletion of part or all of the CYP21 gene is associated with the HLA-haplotype A3, BW47, C6, DR7, DR53, DQ2 but is also observed in other HLA-haplotypes and can be detected by a simple rapid PCR restriction fragment length polymorphism method. (3) Two alleles of the coding CYP21 gene differing in a leucine codon within the first exon, (formerly described as a mutation associated with 21-hydroxylase deficiency) have been found with an equal distribution in patients with 21-hydroxylase deficiency, non-disease HLA-haplotypes and the local healthy controls.

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