In 96 patients with congenital adrenal hyperplasia (CAH) and 50 healthy donors from northwestern Russia the distribution of the HLA-DQA1 alleles and the mutation spectrum and frequency at the CYP21B gene were examined. In the patients with nonclassical (NC) CAH, the distribution of the HLA-DQA1 polymorphic alleles was similar to that in the population sample. In the patients with the salt-wasting form of the disease a statistically significant decrease of the *0401 or *0501major allele frequency was observed. The prevalence of certain HLA-DQA1 genotypes, namely, HLA5, HLA3, and HLA4, was observed in the patients with the NC, salt-wasting (SW), and simple virilizing CAH, respectively. Each clinical group was characterized by a specific spectrum of clinically valuable mutations. An association between theCYP21B mutations most frequently found in case of SW and SV CAH (delB, I2splice, and I172N) and certain HLA-DQA1alleles was demonstrated. The necessity of more precise clinical diagnostics of the NC CAH cases along with detailed examination of this group for determination of the major mutations typical of the NC CAH cases from northwestern Russia is discussed.
Russian Journal of Genetics – Springer Journals
Published: Oct 18, 2004
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