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Loss of heterozygosity on chromosome 16p 13.3 in hamartomas from tuberous sclerosis patients

  • Author(s): Green, AJ
  • Smith, M
  • Yates, JRW
  • et al.
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 DMA 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. © 1994 Nature Publishing Group.

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