62 research outputs found
Cohort profile update: Africa Centre Demographic Information System (ACDIS) and population-based HIV survey
Aerodynamic and Aeroelastic Applications of a Parallel, Multigrid, Unstructured Flow Solver
A randomized trial of exercise versus control for musculoskeletal symptoms from adjuvant anastrozole (A) for postmenopausal early breast cancer (PEBC).
Increased Risk of Mortality following Antibiotic Treatment in Patients with Coronary Artery Disease?
The role of CAV3 in long QT : clinical and functional assessment of a caveolin-3/Kc11.1 compound heterozygote
CITATION: Hedley, P. L. et al. 2013. The role of CAV3 in long QT : clinical and functional assessment of a caveolin-3/Kc11.1 compound heterozygote. Circulation: Cardiovascular Genetics, 6:452-461, doi:10.1161/CIRCGENETICS.113.000137.The original publication is available at https://www.ahajournals.orgBackground—
Mutations in CAV3, coding for caveolin-3, the major constituent scaffolding protein of cardiac caveolae, have been associated with skeletal muscle disease, cardiomyopathy, and most recently long–QT syndrome (LQTS) and sudden infant death syndrome. We examined the occurrence of CAV3 mutations in a large cohort of patients with LQTS.
Methods and Results—
Probands with LQTS (n=167) were screened for mutations in CAV3 using direct DNA sequencing. A single proband (0.6%) was found to be a heterozygous carrier of a previously described missense mutation, caveolin-3:p.T78M. The proband was also a heterozygous carrier of the trafficking-deficient Kv11.1:p.I400N mutation. The caveolin-3:p.T78M mutation was found isolated in 3 family members, none of whom had a prolonged QTc interval. Coimmunoprecipitations of caveolin-3 and the voltage-gated potassium channel subunit (Kv11.1) were performed, and the electrophysiological classification of the Kv11.1 mutant was carried out by patch-clamp technique in human embryonic kidney 293 cells. Furthermore, the T-wave morphology was assessed in mutation carriers, double mutation carriers, and nonmutation carriers by applying a morphology combination score. The morphology combination score was normal for isolated caveolin-3:p.T78M carriers and of LQT2 type in double heterozygotes.
Conclusions—
Mutations in CAV3 are rare in LQTS. Furthermore, caveolin-3:p.T78M did not exhibit a LQTS phenotype. Because no association has ever been found between LQTS and isolated CAV3 mutations, we suggest that LQTS9 is considered a provisional entity.https://www.ahajournals.org/doi/10.1161/CIRCGENETICS.113.000137Publisher's versio
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