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, 6 (2), 193-6

Loss of Heterozygosity on Chromosome 16p13.3 in Hamartomas From Tuberous Sclerosis Patients

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Loss of Heterozygosity on Chromosome 16p13.3 in Hamartomas From Tuberous Sclerosis Patients

A J Green et al. Nat Genet.

Abstract

Tuberous sclerosis (TSC) is an autosomal dominant condition with characteristic skin lesions, mental handicap, seizures and the development of hamartomas in the brain, heart, kidneys and other organs. Linkage studies have shown locus heterogeneity with a TSC gene mapped to chromosome 9q34 and a second, recently identified on 16p13.3. We have analysed DNA markers in eight hamartomas and one tumour from TSC patients and found allele loss on 16p13.3 in three angiomyolipomas, one cardiac rhabdomyoma, one cortical tuber and one giant cell astrocytoma. We suggest that the TSC gene on 16p13.3 functions like a tumour suppressor gene, in accordance with Knudsen's hypothesis.

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