Abstract
Background - Long-QT Syndrome (LQTS) is a cardiovascular disorder characterized by prolongation of the QT interval on ECG and presence of syncope, seizures, and sudden death. Five genes have been implicated in Romano-Ward syndrome, the autosomal dominant form of LQTS: KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. Mutations in KVLQT1 and KCNE1 also cause the Jervell and Lange-Nielsen syndrome, a form of LQTS associated with deafness, a phenotypic abnormality inherited in an autosomal recessive fashion. Methods and Results - We used mutational analyses to screen a pool of 262 unrelated individuals with LQTS for mutations in the 5 defined genes. We identified 134 mutations in addition to the 43 that we previously reported. Eighty of the mutations were novel. The total number of mutations in this population is now 177 (68% of individuals). Conclusions - KVLQT1 (42%) and HERG (45%) accounted for 87% of identified mutations, and SCN5A (8%), KCNE1 (3%), and KCNE2 (2%) accounted for the other 13%. Missense mutations were most common (72%), followed by frameshift mutations (10%), in-frame deletions, and nonsense and splice-site mutations (5% to 7% each). Most mutations resided in intracellular (52%) and transmembrane (30%) domains; 12% were found in pore and 6% in extracellular segments. In most cases (78%), a mutation was found in a single family or an individual.
| Original language | English |
|---|---|
| Pages (from-to) | 1178-1185 |
| Number of pages | 8 |
| Journal | Circulation |
| Volume | 102 |
| Issue number | 10 |
| Publication status | Published - Sep 5 2000 |
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Keywords
- Arrhythmia
- Death, sudden
- Genetics
- Long-QT syndrome
- Torsade de pointes
ASJC Scopus subject areas
- Physiology
- Cardiology and Cardiovascular Medicine
Cite this
Spectrum of mutations in Long-QT Syndrome genes : KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. / Splawski, Igor; Shen, Jiaxiang; Timothy, Katherine W.; Lehmann, Michael H.; Priori, Silvia; Robinson, Jennifer L.; Moss, Arthur J.; Schwartz, Peter J.; Towbin, Jeffrey A.; Vincent, G. Michael; Keating, Mark T.
In: Circulation, Vol. 102, No. 10, 05.09.2000, p. 1178-1185.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Spectrum of mutations in Long-QT Syndrome genes
T2 - KVLQT1, HERG, SCN5A, KCNE1, and KCNE2
AU - Splawski, Igor
AU - Shen, Jiaxiang
AU - Timothy, Katherine W.
AU - Lehmann, Michael H.
AU - Priori, Silvia
AU - Robinson, Jennifer L.
AU - Moss, Arthur J.
AU - Schwartz, Peter J.
AU - Towbin, Jeffrey A.
AU - Vincent, G. Michael
AU - Keating, Mark T.
PY - 2000/9/5
Y1 - 2000/9/5
N2 - Background - Long-QT Syndrome (LQTS) is a cardiovascular disorder characterized by prolongation of the QT interval on ECG and presence of syncope, seizures, and sudden death. Five genes have been implicated in Romano-Ward syndrome, the autosomal dominant form of LQTS: KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. Mutations in KVLQT1 and KCNE1 also cause the Jervell and Lange-Nielsen syndrome, a form of LQTS associated with deafness, a phenotypic abnormality inherited in an autosomal recessive fashion. Methods and Results - We used mutational analyses to screen a pool of 262 unrelated individuals with LQTS for mutations in the 5 defined genes. We identified 134 mutations in addition to the 43 that we previously reported. Eighty of the mutations were novel. The total number of mutations in this population is now 177 (68% of individuals). Conclusions - KVLQT1 (42%) and HERG (45%) accounted for 87% of identified mutations, and SCN5A (8%), KCNE1 (3%), and KCNE2 (2%) accounted for the other 13%. Missense mutations were most common (72%), followed by frameshift mutations (10%), in-frame deletions, and nonsense and splice-site mutations (5% to 7% each). Most mutations resided in intracellular (52%) and transmembrane (30%) domains; 12% were found in pore and 6% in extracellular segments. In most cases (78%), a mutation was found in a single family or an individual.
AB - Background - Long-QT Syndrome (LQTS) is a cardiovascular disorder characterized by prolongation of the QT interval on ECG and presence of syncope, seizures, and sudden death. Five genes have been implicated in Romano-Ward syndrome, the autosomal dominant form of LQTS: KVLQT1, HERG, SCN5A, KCNE1, and KCNE2. Mutations in KVLQT1 and KCNE1 also cause the Jervell and Lange-Nielsen syndrome, a form of LQTS associated with deafness, a phenotypic abnormality inherited in an autosomal recessive fashion. Methods and Results - We used mutational analyses to screen a pool of 262 unrelated individuals with LQTS for mutations in the 5 defined genes. We identified 134 mutations in addition to the 43 that we previously reported. Eighty of the mutations were novel. The total number of mutations in this population is now 177 (68% of individuals). Conclusions - KVLQT1 (42%) and HERG (45%) accounted for 87% of identified mutations, and SCN5A (8%), KCNE1 (3%), and KCNE2 (2%) accounted for the other 13%. Missense mutations were most common (72%), followed by frameshift mutations (10%), in-frame deletions, and nonsense and splice-site mutations (5% to 7% each). Most mutations resided in intracellular (52%) and transmembrane (30%) domains; 12% were found in pore and 6% in extracellular segments. In most cases (78%), a mutation was found in a single family or an individual.
KW - Arrhythmia
KW - Death, sudden
KW - Genetics
KW - Long-QT syndrome
KW - Torsade de pointes
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UR - http://www.scopus.com/inward/citedby.url?scp=0034609531&partnerID=8YFLogxK
M3 - Article
VL - 102
SP - 1178
EP - 1185
JO - Circulation
JF - Circulation
SN - 0009-7322
IS - 10
ER -