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. 1995 Jan;56(1):58–66.

Novel Mutations and Deletions of the KIT (Steel Factor Receptor) Gene in Human Piebaldism

Kazuhiko Ezoe, Stuart A Holmes, Lingling Ho, Christopher P Bennett, Jean L Bolognia, Louise Brueton, John Burn, Rafael Falabella, Emilia M Gatto, Norihisa Ishii, Celia Moss, Mark R Pittelkow, Elizabeth Thompson, K Anne Ward, Richard A Spritz
PMCID: PMC1801299  PMID: 7529964

Abstract

Piebaldism is an autosomal dominant genetic disorder of pigmentation characterized by white patches of skin and hair. Melanocytes are lacking in these hypopigmented regions, the result of mutations of the KIT gene, which encodes the cell surface receptor for steel factor (SLF). We describe the analysis of 26 unrelated patients with piebaldism-like hypopigmentation—17 typical patients, 5 with atypical clinical features or family histories, and 4 with other disorders that involve white spotting. We identified novel pathologic mutations or deletions of the KIT gene in 10 (59%) of the typical patients, and in 2 (40%) of the atypical patients. Overall, we have identified pathologic KIT gene mutations in 21 (75%) of 28 unrelated patients with typical piebaldism we have studied. Of the patients without apparent KIT mutations, none have apparent abnormalities of the gene encoding SLF itself (MGF), and genetic linkage analyses in two of these families are suggestive of linkage of the piebald phenotype to KIT. Thus, most patients with typical piebaldism appear to have abnormalities of the KIT gene.

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Selected References

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