Relatively common mutations of the Bloom syndrome gene in the Japanese population
Copyright policy )Relatively common mutations of the Bloom syndrome gene in the Japanese population
Bloom syndrome (BS) is a rare autosomal recessive genetic disorder characterized by lupus-like erythematous facial telangiectasia, sun sensitivity, infertility, stunted growth and a high predisposition to various types of cancer. Chromosomal abnormalities are hallmarks of this disorder, and high frequencies of sister chromatid exchanges and quadriradial configurations in lymphocytes and fibroblasts are diagnostic features. BLM is the causative gene for BS. We investigated the mutation in the BLM gene in 4 Japanese BS kindreds. Taken together with previously documented mutations, 2 kindreds were homozygous for 631delCAA and 2 were compound heterozygous for 631delCAA. The silent mutation of A1055C (Thr to Thr) was detected in control Japanese individuals. The 6-bp deletion/7-bp insertion at position 2,281, which most Askenazi Jewish BS patients carry, was not detected in 200 Japanese alleles. These results suggest that 631delCAA is a relatively common mutation among the Japanese BS patients.
Adenosine Triphosphatases, Adult, Male, Heterozygote, Adolescent, DNA Mutational Analysis, Homozygote, DNA Helicases, Genes, Recessive, Cell Transformation, Viral, Cell Line, Genetics, Population, Japan, Mutation, Humans, Female, Gene Silencing, Bloom Syndrome, Gene Deletion, Cell Line, Transformed
Adenosine Triphosphatases, Adult, Male, Heterozygote, Adolescent, DNA Mutational Analysis, Homozygote, DNA Helicases, Genes, Recessive, Cell Transformation, Viral, Cell Line, Genetics, Population, Japan, Mutation, Humans, Female, Gene Silencing, Bloom Syndrome, Gene Deletion, Cell Line, Transformed
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