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American Journal of Pathology, Vol 137, 149-153, Copyright © 1990 by American Society for Investigative Pathology

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Neonatal hemochromatosis. Genetic analysis of transferrin-receptor, H- apoferritin, and L-apoferritin loci and of the human leukocyte antigen class I region

L Hardy, JL Hansen, JP Kushner and AS Knisely
Department of Pathology, University of Utah School of Medicine, Salt Lake City 84132.

Neonatal hemochromatosis (NH), a generally fatal disorder of infancy, is characterized by severe hepatic insufficiency of intrauterine onset and by marked organ iron loading. Its cause is unknown. It has been suggested that NH may represent an unusual manifestation of hereditary hemochromatosis (HH), which is human leukocyte antigen (HLA) linked. Evidence for major rearrangements or deletions at the HLA class I region and at three loci directly involved in iron metabolism (H- and L- apoferritin and the transferrin receptor [TfR]) was sought. The population studied included five probands with NH and 14 first-degree family members in a total of six kindreds. Also sought were HLA associations with NH by collating the results of HLA serotyping in these 19 persons and in 17 members of 7 additional kindreds in which NH has occurred, including 5 probands with NH and 12 first-degree family members. We found no evidence for major rearrangements or deletions in H- or L-apoferritin genes, in TfR genes, or within the HLA locus. We found no evidence for linkage of NH to HLA serotypes. We conclude that while NH and HH are similar in their patterns of iron loading, they are not genetically related.

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