Homozygosity for the mutation Cys282Tyr in the HFE gene has recently been identified as a cause of hereditary hemochromatosis, a disorder resulting in the inappropriate absorption of iron.
Approximately 10% of Caucasians are heterozygous for this mutation ; however, the gene frequency in African Americans is unknown.
A study of a control population of African Americans was performed to determine the frequency of the Cys282Tyr and His63Asp alleles in this ethnic group.
The carrier frequency for each mutant allele in our African American population was 3.0%. DNA studies of four African-American hemochromatosis patients did not identify any individuals with the Cys282Tyr allele.
These findings suggest that if the Cys282Tyr mutation confers susceptibility to hemochromatosis in Caucasians (as suggested by recent studies) there is an alternative mechanism for hemochromatosis in the American black population.
Mots-clés Pascal : Hémochromatose, Héréditaire, Mutation, Gène, Asymptomatique, Prévalence, Epidémiologie, Noir américain, Négroïde, Race, Etats Unis, Amérique du Nord, Amérique, Homme, Fer, Métabolisme pathologie, Enzymopathie, Maladie héréditaire
Mots-clés Pascal anglais : Hemochromatosis, Hereditary, Mutation, Gene, Asymptomatic, Prevalence, Epidemiology, Black American, Negroid, Race, United States, North America, America, Human, Iron, Metabolic diseases, Enzymopathy, Genetic disease
Notice produite par :
Inist-CNRS - Institut de l'Information Scientifique et Technique
Cote : 98-0316008
Code Inist : 002B22D05. Création : 27/11/1998.