Murakami T, Fukai K, Oiso N, Hosomi N, Kato A, Garganta C, Barnicoat A, Poppelaars F, Aquaron R, Paller AS, Ishii M. New KIT mutations in patients with piebaldism.
J Dermatol Sci 2004;
35:29-33. [PMID:
15194144 DOI:
10.1016/j.jdermsci.2004.03.003]
[Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2003] [Revised: 02/27/2004] [Accepted: 03/05/2004] [Indexed: 02/07/2023]
Abstract
BACKGROUND
Piebaldism is an autosomal dominantly inherited disorder characterized by congenital leukoderma, typically on the forehead, abdomen, and knees. The leukoderma is usually stable throughout life. KIT mutations have been demonstrated in about 75% of patients with piebaldism.
OBJECTIVES
To identify KIT mutations of the family with piebaldism and examine genotype-phenotype correlations in this disorder.
METHODS
PCR-direct-sequencing technique using genomic DNA from peripheral leukocytes.
RESULTS
We have studied 10 individuals within six piebaldism families and able to identify six novel mutations in the KIT gene in patients with piebaldism. These include four frameshift mutations: 142delG, 1768-1769delAG, 2139delC, 2246-2249delAAAG, and two missense mutations: M541L, Y870C.
CONCLUSIONS
These six new mutations are associated with phenotypes that are well in accordance with our knowledge of genotype-phenotype correlations in KIT.
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