Related Experiment Video
Updated: Mar 10, 2026
13:06
Pyrosequencing: A Simple Method for Accurate Genotyping
Published on: January 8, 2008
28.2K
Quantitative analysis of single-nucleotide polymorphisms by pyrosequencing with di-base addition
Dan Pu1,2, Rongfang Pan1, Wenbin Liu1
1State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing, P. R. China.
Electrophoresis
|December 14, 2016
Summary
A novel pyrosequencing with di-base addition (PDBA) method accurately quantifies single nucleotide polymorphisms (SNPs). This highly sensitive approach detects low-frequency alleles, offering a cost-effective tool for clinical genetic analysis.
Area of Science:
- Molecular Biology
- Genetics
- Biotechnology
Background:
- Quantitative detection of single nucleotide polymorphisms (SNPs) is crucial for genetic research and clinical diagnostics.
- Conventional methods for SNP genotyping may lack the sensitivity required for detecting low-frequency alleles.
Purpose of the Study:
- To develop and validate a novel quantitative method for SNP detection using pyrosequencing with di-base addition (PDBA).
- To assess the sensitivity, reproducibility, and cost-effectiveness of the PDBA method compared to conventional pyrosequencing.
Main Methods:
- Development of PDBA assays for quantitative detection of specific SNPs (rs6717546 and rs4148324).
- Establishment of linear formulas (Y = AX + B) based on signal intensity and template concentration for genotype quantification.
- Validation using a panel of defined mixtures and template fragments.
Main Results:
- The PDBA method accurately quantified allele frequencies for tested genotypes, showing 100% concordance with defined mixtures.
- The method demonstrated high sensitivity, detecting alleles at frequencies as low as 3%, surpassing conventional pyrosequencing (∼5-7%).
- Results were comparable to conventional pyrosequencing, indicating high accuracy and reproducibility.
Conclusions:
- PDBA offers a highly sensitive, reproducible, and cost-effective method for quantitative SNP analysis.
- This approach provides a valuable tool for analyzing SNPs in clinical samples, particularly for detecting low-frequency variants.
- The PDBA method enhances the capabilities of genetic analysis in research and diagnostics.
Related Concept Videos
01:57Sanger Sequencing
777.0K
DNA sequencing is a fundamental technique that is routinely used in the biological sciences. This method can be applied to a range of questions at different scales - from the sequencing of a cloned DNA fragment or the study of a mutation in a gene up to whole-genome sequencing. However, despite the widespread use of sequencing today, it was not until 1977 that Fredrick Sanger and his collaborators developed the chain-termination method to decode DNA sequences. It relies on the separation of a...
777.0K
03:00Next-generation Sequencing
100.1K
The first human genome sequencing project cost $2.7 billion and was declared complete in 2003, after 15 years of international cooperation and collaboration between several research teams and funding agencies. Today, with the advent of next-generation sequencing technologies, the cost and time of sequencing a human genome have dropped over 100 fold.
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
Next-Generation Sequencing Methods
Although all next-generation methods use different technologies, they all share a set of standard features....
100.1K
03:21RNA-seq
12.3K
RNA sequencing, or RNA-Seq, is a high-throughput sequencing technology used to study the transcriptome of a cell. Transcriptomics helps to interpret the functional elements of a genome and identify the molecular constituents of an organism. Additionally, it also helps in understanding the development of an organism and the occurrence of diseases.
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
Before the discovery of RNA-seq, microarray-based methods and Sanger sequencing were used for transcriptome analysis. However, while...
12.3K