Genetic background of catecholaminergic polymorphic ventricular tachycardia in Japan.
Circ J
; 77(7): 1705-13, 2013.
Article
en En
| MEDLINE
| ID: mdl-23595086
ABSTRACT
BACKGROUND:
The genetic background of catecholaminergic polymorphic ventricular tachycardia (CPVT) has been extensively investigated for the last decade in Western countries, but it remains unstudied in the Asian population. METHODS ANDRESULTS:
In 50 Japanese probands from unrelated families who satisfied clinical criteria for CPVT, genetic testing was conducted in all exons on 3 CPVT-related genes cardiac ryanodine receptor 2 (RYR2), calsequestrin 2 (CASQ2) and inward rectifier potassium channel 2 (KCNJ2), and the clinical features between RYR2-genotyped and -non-genotyped patient groups were compared. Genetic and clinical evaluation was also done in 46 family members. In the genetic screening, 28 (18 novel) RYR2 (56.0%), 1 compound heterozygous CASQ2 (2.0%) and 1 KCNJ2 (2.0%) mutation carriers were identified. In the RYR2 mutation-positive group, the frequency of bidirectional ventricular tachycardia and the use of ß-blockers were significantly higher than in the mutation-negative group. In contrast, there was no significant difference in supraventricular arrhythmias between the 2 groups. With regard to disease penetrance, the number of family members of RYR2-genotyped probands with a clinical diagnosis of CPVT was high.CONCLUSIONS:
Thirty gene mutation carriers were found for 3 genes in 50 probands clinically diagnosed as having CPVT. The penetrance of CPVT phenotype was significantly higher in RYR2 mutation carriers, thus RYR2 gene screening in CPVT patients would be indispensable to prevent unexpected cardiac sudden death of young family members.
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Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Calsecuestrina
/
Exones
/
Taquicardia Ventricular
/
Canal Liberador de Calcio Receptor de Rianodina
/
Canales de Potasio de Rectificación Interna
/
Mutación
Tipo de estudio:
Prognostic_studies
Límite:
Adolescent
/
Child
/
Child, preschool
/
Female
/
Humans
/
Male
País/Región como asunto:
Asia
Idioma:
En
Revista:
Circ J
Asunto de la revista:
ANGIOLOGIA
/
CARDIOLOGIA
Año:
2013
Tipo del documento:
Article
País de afiliación:
Japón