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Single Droplet Digital Polymerase Chain Reaction for Comprehensive and Simultaneous Detection of Mutations in Hotspot Regions
Published on: September 25, 2018
Heteroduplex analysis by capillary array electrophoresis for rapid mutation detection in large multiexon genes
Eladio Velasco1, Mar Infante, Mercedes Durán
1Laboratorio de Genética del Cáncer, Instituto de Biología y Genética Molecular (IBGM), Universidad de Valladolid, Valladolid, Spain. evelasco@ped.uva.es
Nature Protocols
|April 3, 2007
Summary
Heteroduplex analysis by capillary array electrophoresis (HA-CAE) offers a sensitive and specific method for detecting DNA variants. This high-throughput technique efficiently scans large genes, identifying numerous mutations in a single run.
Area of Science:
- Genetics
- Molecular Biology
- Biotechnology
Background:
- Heteroduplex analysis (HA) is a reliable method for mutation detection.
- Capillary array electrophoresis (CAE) enhances throughput for DNA sequencing.
- Scanning large multiexon genes requires efficient mutation detection techniques.
Purpose of the Study:
- To develop and describe a high-throughput protocol for mutation detection using HA-CAE.
- To adapt HA-CAE for scanning large multiexon genes like BRCA1, BRCA2, MLH1, MSH2, and MSH6.
- To demonstrate the sensitivity and specificity of HA-CAE for identifying known and novel DNA variants.
Main Methods:
- Multiplex-PCR with fluorescently labeled primers.
- Heteroduplex formation.
- Electrophoresis on a multicapillary DNA sequencer (ABI3130XL).
Main Results:
- The HA-CAE protocol enables scanning of approximately 25 kb of coding and intronic sequences for genes like BRCA1 and BRCA2 in a single run.
- The technique has successfully identified 150 different mutations, including single nucleotide substitutions and small insertions/deletions.
- The protocol is efficient, with a total completion time of 7-8 hours.
Conclusions:
- HA-CAE is a robust, sensitive, and specific method for high-throughput mutation detection.
- This protocol facilitates the comprehensive scanning of large multiexon genes.
- The method is adaptable to different instruments and other large genes for genetic studies.
