Abstract |
To date the molecular basis and hormonal criteria for inherited mild late-onset 3 beta-hydroxysteroid dehydrogenase (3 beta-HSD) deficiency congenital adrenal hyperplasia (CAH) have not been defined. We have thus investigated the presence or absence of mutation in the type II 3 beta-HSD gene encoding adrenal/gonadal 3 beta-HSD in each of five premature pubarche children and hirsute female patients manifesting moderately decreased adrenal 3 beta-HSD activity. ACTH-stimulated hormonal levels in all patients compared with mean levels in pubertal stage-matched normal subjects were between 2.5 and 6.5 SD for 17-hydroxypregnenolone levels, and between 2.5 and 7 SD for dehydroepiandrosterone levels in all except one patient. 17-Hydroxypregnenolone to cortisol ratios were between 2.5 and 4.3 SD, and dehydroepiandrosterone to androstenedione ratios were between 3 and 8.6 SD. The type II 3 beta-HSD gene regions of a putative promoter, exons I, II, III, and IV, and exon-intron boundaries in all subjects were amplified by polymerase chain reaction and then sequenced. All patients had normal sequences of the type II 3 beta-HSD gene in both alleles. Three female patients heterozygotic for severe 3 beta-HSD deficiency CAH with one allele mutation of the gene demonstrated normal ACTH-stimulated hormone profiles. These data indicate that moderately decreased adrenal 3 beta-HSD activity resulting in modestly increased delta 5 precursor steroid levels and delta 5 to delta 4 steroid ratios in premature pubarche and hirsute patients is not caused by a mutation in the type II 3 beta-HSD gene.(ABSTRACT TRUNCATED AT 250 WORDS)
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Authors | Y T Chang, L Zhang, H S Alkaddour, J I Mason, K Lin, X Yang, L R Garibaldi, C J Bourdony, L M Dolan, D L Donaldson |
Journal | Pediatric research
(Pediatr Res)
Vol. 37
Issue 6
Pg. 820-4
(Jun 1995)
ISSN: 0031-3998 [Print] United States |
PMID | 7651769
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Research Support, U.S. Gov't, P.H.S.)
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Chemical References |
- Adrenocorticotropic Hormone
- 3-Hydroxysteroid Dehydrogenases
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Topics |
- 3-Hydroxysteroid Dehydrogenases
(deficiency, genetics)
- Adolescent
- Adrenocorticotropic Hormone
- Adult
- Base Sequence
- Child
- Child, Preschool
- Exons
- Female
- Genetic Code
- Hirsutism
(genetics)
- Humans
- Introns
- Point Mutation
- Puberty, Precocious
(genetics)
- Stimulation, Chemical
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