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- Title
Mutation analysis in Bardet-Biedl syndrome by DNA pooling and massively parallel resequencing in 105 individuals.
- Authors
Janssen, Sabine; Ramaswami, Gokul; Davis, Erica E.; Hurd, Toby; Airik, Rannar; Kasanuki, Jennifer M.; Van Der Kraak, Lauren; Allen, Susan J.; Beales, Philip L.; Katsanis, Nicholas; Otto, Edgar A.; Hildebrandt, Friedhelm
- Abstract
Bardet-Biedl syndrome (BBS) is a rare, primarily autosomal-recessive ciliopathy. The phenotype of this pleiotropic disease includes retinitis pigmentosa, postaxial polydactyly, truncal obesity, learning disabilities, hypogonadism and renal anomalies, among others. To date, mutations in 15 genes ( BBS1- BBS14, SDCCAG8) have been described to cause BBS. The broad genetic locus heterogeneity renders mutation screening time-consuming and expensive. We applied a strategy of DNA pooling and subsequent massively parallel resequencing (MPR) to screen individuals affected with BBS from 105 families for mutations in 12 known BBS genes. DNA was pooled in 5 pools of 21 individuals each. All 132 coding exons of BBS1- BBS12 were amplified by conventional PCR. Subsequent MPR was performed on an Illumina Genome Analyzer II™ platform. Following mutation identification, the mutation carrier was assigned by CEL I endonuclease heteroduplex screening and confirmed by Sanger sequencing. In 29 out of 105 individuals (28%), both mutated alleles were identified in 10 different BBS genes. A total of 35 different disease-causing mutations were confirmed, of which 18 mutations were novel. In 12 additional families, a total of 12 different single heterozygous changes of uncertain pathogenicity were found. Thus, DNA pooling combined with MPR offers a valuable strategy for mutation analysis of large patient cohorts, especially in genetically heterogeneous diseases such as BBS.
- Subjects
LAURENCE-Moon-Biedl syndrome; GENITAL abnormalities; GENETIC disorders; RETINITIS pigmentosa; OBESITY; LEARNING disabilities; HUMAN genome
- Publication
Human Genetics, 2011, Vol 129, Issue 1, p79
- ISSN
0340-6717
- Publication type
Article
- DOI
10.1007/s00439-010-0902-8