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Coupling of HLA-A3,Cw6,Bw47,DR7 and a normal CA21HB steroid 21-hydroxylase gene in the Old Order Amish. J Clin Endocrinol Metab 1987 Nov;65(5):980-6

Date

11/01/1987

Pubmed ID

2822757

DOI

10.1210/jcem-65-5-980

Scopus ID

2-s2.0-0023638609   7 Citations

Abstract

HLA-Bw47, a rare human histocompatibility antigen, occurs in strong linkage disequilibrium with HLA-A3,Cw6,DR7 and salt-losing congenital adrenal hyperplasia (CAH) due to 21-hydroxylase deficiency and is associated with a contiguous deletion of the active CA21HB gene and the C4B complement gene. We studied the HLA-A3,Cw6,Bw47,DR7 haplotype in 10 subjects of the Old Order Amish of Lancaster County in Pennsylvania and found that this haplotype, which occurs with a similar frequency in this group as in the general caucasoid population, has C4B and Ca21HB genes. These C4B and CA21HB genes are expressed as assessed by C4 typing and iv ACTH testing, respectively. Serological studies indicate that the HLA-D loci of this Amish haplotype are the same as those in patients with HLA-Bw47 and CAH, but different from HLA-D loci coupled to HLA-B13, which some workers have proposed is the progenitor genotype for HLA-Bw47. Our studies demonstrate that 1) HLA-Bw47 is not an invariant marker for salt-losing CAH due to 21-hydroxylase deficiency, and 2) the HLA-Bw47 phenotype coupled to CAH is not derived from the HLA-B13 genotype by a single mutation.

Author List

Donohoue PA, Van Dop C, Migeon CJ, McLean RH, Bias WB

Author

Patricia A. Donohoue MD Chief, Professor in the Pediatrics department at Medical College of Wisconsin




MESH terms used to index this publication - Major topics in bold

Adrenal Hyperplasia, Congenital
Chromosome Mapping
DNA Restriction Enzymes
Ethnic Groups
Genes
HLA Antigens
HLA-C Antigens
HLA-DR Antigens
HLA-DR7 Antigen
Haplotypes
Humans
Hybridization, Genetic
Pedigree
Pennsylvania
Religion
Steroid 21-Hydroxylase
Steroid Hydroxylases