Document Detail

Molecular genetic analysis of patients carrying steroid 21-hydroxylase deficiency in the Mexican population: identification of possible new mutations and high prevalence of apparent germ-line mutations.
MedLine Citation:
PMID:  9580109     Owner:  NLM     Status:  MEDLINE    
Steroid 21-hydroxylase deficiency is the underlying cause in over 90% of patients with congenital adrenal hyperplasia, an inherited metabolic disorder of adrenal steroidogenesis. We have characterized 94 mutant alleles from 47 unrelated Mexican patients and the corresponding mutant alleles in their parents by amplification of the functional CYP21 gene by PCR, followed by direct sequence analysis. The study included patients diagnosed with the three clinical forms of the disease. Our results revealed: (1) the presence of relatively few mutations or combinations of mutations associated with particular phenotypes; (2) the presence of putative new mutations; (3) the finding of identical genotypes in patients displaying discordant phenotypes; (4) the identification of patients lacking all previous reported mutations; and (5) an apparent high frequency of germ-line mutations. The absence of previously reported mutations in about 22% of the disease alleles, the finding of putative new mutations in some of the patients lacking previously known mutations, and the apparent high prevalence of germ-line mutations make evident the differences in the genetic background leading to this disorder between the Caucasian and the Mexican populations.
M L Ordoñez-Sánchez; S Ramírez-Jiménez; A U López-Gutierrez; L Riba; S Gamboa-Cardiel; M Cerrillo-Hinojosa; N Altamirano-Bustamante; R Calzada-León; C Robles-Valdés; F Mendoza-Morfin; M T Tusié-Luna
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Human genetics     Volume:  102     ISSN:  0340-6717     ISO Abbreviation:  Hum. Genet.     Publication Date:  1998 Feb 
Date Detail:
Created Date:  1998-04-03     Completed Date:  1998-04-03     Revised Date:  2009-11-19    
Medline Journal Info:
Nlm Unique ID:  7613873     Medline TA:  Hum Genet     Country:  GERMANY    
Other Details:
Languages:  eng     Pagination:  170-7     Citation Subset:  IM    
Unidad de Genética de la Nutrición del Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City.
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MeSH Terms
Adrenal Hyperplasia, Congenital* / enzymology,  epidemiology,  genetics*
DNA Mutational Analysis
Genetic Testing
Germ-Line Mutation*
Mexico / epidemiology
Point Mutation*
Polymerase Chain Reaction
Sequence Analysis, DNA
Steroid 21-Hydroxylase / genetics*
Reg. No./Substance:
EC 21-Hydroxylase

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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