Alport syndrome (AS) can be caused by mutations in COL4A5, one of the six type IV collagen genes. For the purposes of confirming diagnoses, carrier screening and correlating genotype to phenotype, we have screened all 51 exons of this gene by SSCP analysis in 153 families with suspected AS. Mutation
A two-tier approach to mutation detection in the COL4A5 gene for Alport syndrome
β Scribed by Kathy King; Frances A. Flinter; Peter M. Green
- Publisher
- John Wiley and Sons
- Year
- 2006
- Tongue
- English
- Weight
- 84 KB
- Volume
- 27
- Category
- Article
- ISSN
- 1059-7794
No coin nor oath required. For personal study only.
β¦ Synopsis
About 85% of Alport syndrome is an X-linked semi-dominant condition caused by mutations in the collagen gene, COL4A5. The large size and high GC content of this gene have presented diagnostic laboratories with problems in identifying mutations with greater than about a 50% success rate since the gene was first cloned 16 years ago. An RNA based approach is adopted here for a first pass mutation scanning coupled with more traditional exon-by-exon screening to increase the rate of mutation identification. Twenty-one mutations were identified in twenty-five patients with clear Alport syndrome including four gross deletions, two deep intronic mutations, three frameshifts, three splice site mutations, eight missense mutations and one inframe deletion.
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Alport syndrome is a progressive renal disease leading to chronic renal failure, which often is accompanied by sensorineural deafness and ophthalmological signs in the form of anterior lenticonus. The X-linked form of the disease is caused by mutations in the COL4A5 gene encoding the a5-chain of typ
## Communicated by Sesgio Otrdenghi Alport's syndrome is characterized clinically by a nonimmune glomerulopathy, often accompanied by sensorineural hearing loss and lens abnormalities, frequently due to mutations in the COL4A5 gene.
## Communicated by Richard Cotton Stickler syndrome is a genetically heterogenous disorder that affects the ocular, skeletal, and auditory systems. To date three genes, COL2A1, COL11A1, and COL11A2, encoding the heterotypic type II/XI collagen fibrils present in vitreous and cartilage have been s