Abstract:
BACKGROUND:Werner's syndrome, a rare autosomal recessive disorder, is characterized by features of premature aging. Seventy-five percent of the alleles of Japanese patients with Werner's syndrome have one of three major mutations. OBJECTIVE:To determine the genotype of a patient with Werner's syndrome. METHODS:We diagnosed Werner's syndrome in a 47-year-old Japanese man who had juvenile cataracts, skin sclerosis and hyperpigmentation of the feet, a high-pitched voice, characteristic bird-like appearance of the face with a beak-shaped nose, thinning of the skin over the whole body and hyperkeratoses on the soles of the feet, hyperlipidemia, and diabetes mellitus. None of his immediate family had entered into a consanguineous marriage. He had undergone surgery to treat duodenal perforation. We screened his family for three major mutations (mutations 1, 4, 6) in the WRN gene by polymerase chain reaction-restriction fragment length polymorphism. Automated DNA sequencing fluorescence-labeled dideoxy terminators proceeded for abnormally migrating bands. RESULTS:The patient and his mother had mutation 1 (nonsense mutation) in one chromosome. Although mutations 4 and 6 were undetectable, screening for mutation 4 revealed an abnormally migrating band. Consequently, we discovered a novel 4-bp deletion in exon 25 only in the patient. This mutation was not detected in any other family member. CONCLUSION:This is the first description of a patient with Werner's syndrome who has a compound heterozygote of mutation 1 and a novel deletion mutation.
journal_name
Gerontologyjournal_title
Gerontologyauthors
Nakayama T,Ochiai T,Takahashi Y,Ohkubo K,Hironaga T,Kokubun Sdoi
10.1159/000058353keywords:
subject
Has Abstractpub_date
2002-07-01 00:00:00pages
215-9issue
4eissn
0304-324Xissn
1423-0003pii
58353journal_volume
48pub_type
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