Related Experiment Video
Updated: Jun 12, 2026
05:53
Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
A new approach to long QT syndrome mutation detection by Sequenom MassARRAY system
Catarina Allegue1, Rocio Gil, Paula Sanchez-Diz
1Genomics Medicine Group, Galician Foundation of Genomic Medicine and University of Santiago de Compostela, CIBERER Santiago de Compostela, Spain.
Electrophoresis
|May 21, 2010
Summary
This study presents a rapid genetic testing method for congenital long QT syndrome and Brugada syndrome, analyzing 433 mutations across three key genes. The Sequenom MassARRAY system offers a reliable and cost-efficient diagnostic approach for these inherited cardiac conditions.
Area of Science:
- Cardiology
- Genetics
- Molecular Diagnostics
Background:
- Congenital long QT syndrome (LQTS) is an inherited cardiac disorder.
- LQTS is characterized by a prolonged QT interval and polymorphic ventricular arrhythmias.
- Mutations in KCNQ1, KCNH2, and SCN5A genes are most common in LQTS.
Purpose of the Study:
- To develop a diagnostic approach for LQTS and Brugada syndrome.
- To utilize the Sequenom MassARRAY system for mutation detection.
- To analyze 433 mutations in the three most prevalent LQTS genes.
Main Methods:
- Developed three diagnostic tests targeting KCNQ1, KCNH2, and SCN5A genes.
- Utilized Sequenom MassARRAY system for multiplex mutation analysis.
- Validated tests on 502 samples from individuals with diverse clinical histories.
Main Results:
- Analyzed 433 mutations in 38 multiplex reactions, with detection in approximately 48 hours.
- Achieved average call rates of 93% for KCNQ1, 83% for KCNH2, and 73% for SCN5A.
- Demonstrated high reliability, flexibility, and cost-efficiency of the Sequenom MassARRAY system.
Conclusions:
- The developed diagnostic approach is reliable for genetic testing in LQTS and Brugada syndrome.
- Sequenom MassARRAY offers a cost-efficient alternative to conventional genetic testing methods.
- The system allows for flexible upgrades to include new mutations.
