title: Single nucleotide polymorphism analysis by allele-specific primer extension with real-time bioluminescence detection in a microfluidic device.
abstract: A microfluidic approach for rapid bioluminescent real-time detection of single nucleotide polymorphism (SNP) is presented. The method is based on single-step primer extension using pyrosequencing chemistry to monitor nucleotide incorporations in real-time. The method takes advantage of the fact that the reaction kinetics differ between matched and mismatched primer-template configurations. We show here that monitoring the initial reaction in real time accurately scores SNPs by comparing the initial reaction kinetics between matched and mismatched configurations. Thus, no additional treatment is required to improve the sequence specificity of the extension, which has been the case for many allele-specific extension assays. The microfluidic approach was evaluated using four SNPs. Three of the SNPs included primer-template configurations that have been previously reported to be difficult to resolve by allele-specific primer extension. All SNPs investigated were successfully scored. Using the microfluidic device, the volume for the bioluminescent assay was reduced dramatically, thus offering a cost-effective and fast SNP analysis method.
authors.affiliation: Department of Signals, Sensors and Systems, Microsystem Technology, Royal Institute of Technology, SE-100 44 Stockholm, Sweden. aman.russom@s3.kth.se
authors.forename: Aman
authors.initials: A
authors.lastname: Russom
authors.forename: Nigel
authors.initials: N
authors.lastname: Tooke
authors.forename: Helene
authors.initials: H
authors.lastname: Andersson
authors.forename: Göran
authors.initials: G
authors.lastname: Stemme
mesh_terms: D000483:Alleles; D020137:Base Pair Mismatch; D017931:DNA Primers; D008163:Luminescent Measurements; D044085:Microfluidics / Q000295:instrumentation*; D020641:Polymorphism, Single Nucleotide
chemical_list: D017931:DNA Primers