Abstract:
:Genome variation provides researchers with thousands of markers with which to study human demographic history and phenotypes. Insertion-deletion (indel) polymorphism is an important and abundant form of human genome variation, and convenient methods for genotyping indels are therefore needed. Here we evaluate dynamic allele-specific hybridization (DASH) for its ability to score indels. Evaluation of six model indel DASH assays based on synthetic oligonucleotides showed that length differences of 1-5 bp were accurately scored. Only single probes were required to assay indels of 3-4 bp or less, while longer indels tended to require the use of both allele probes serially. The best results were obtained by central placing of the probe over the indel. Model study findings were confirmed by running indel DASH assays upon PCR-amplified targets representing four polymorphisms from Alzheimer's disease candidate genes APBB1 and LRP1. These indels were genotyped in a set of 121 patients and 156 controls. While no disease association was found, the data quality confirmed that DASH is a robust and useful procedure for genotyping indels of the size range typically found in the human genome.
journal_name
Biotechniquesjournal_title
BioTechniquesauthors
Sawyer SL,Howell WM,Brookes AJdoi
10.2144/03352st01subject
Has Abstractpub_date
2003-08-01 00:00:00pages
292-6, 298issue
2eissn
0736-6205issn
1940-9818journal_volume
35pub_type
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