RB1 gene mutations in retinoblastoma
β Scribed by Dietmar R. Lohmann
- Publisher
- John Wiley and Sons
- Year
- 1999
- Tongue
- English
- Weight
- 237 KB
- Volume
- 14
- Category
- Article
- ISSN
- 1059-7794
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β¦ Synopsis
Mutations in both alleles of the RB1 gene are causal for the development of retinoblastoma, a childhood tumor of the eye. The spectrum of somatic and germline mutations in this gene is dominated by small mutations. Data on small mutations are listed in a locus specific database available at http://www.d-lohmann.de/Rb/mutations.html. Analysis of 368 reported small mutations reveals considerable heterogeneity. A notable recurrence of transitions is observed at 13 CpG-dinucleotides that are part of CGA codons or splice donor sites. Most mutations create a premature termination codon. With few exceptions, patients heterozygous for mutations of this kind develop bilateral retinoblastoma. Missense mutations and inframe deletions are rare. Some of these mutations are associated with a distinct phenotype marked by incomplete penetrance and reduced expressivity.
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