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SCN5ASodium Channel, Voltage-Gated, Type V, Alpha Subunit
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SCN5A mutations and the role of genetic background in the pathophysiology of Brugada syndrome.
Although a recent case of lignocaine-induced Brugada ECG has been reported in a patient with a novel double mutation of the SCN5A gene (36), it is generally believed that lignocaine is safe if combined with adrenaline and used in low dose (11).
For example, the S1102Y variant of the SCN5A gene predisposes individuals to arrhythmias in presence of QT prolonging drugs and hypokalemia (13).
A variation in the SCN5A Y1103 allele appears to put African American infants at risk for SIDS, reported Leigh D.
BRS is a familial disease that displays an autosomal dominant mode of transmission and has been linked to mutations in SCN5A, a gene located on chromosome 3 encoding the [alpha]-subunit of the sodium channel that leads to sodium channelopathy and causes a reduction in the density of the fast sodium current.
This gene, called SCN5A, encodes a sodium ion channel, another regulatory protein on the surface of heart cells.
The FAMILION Postmortem Channelopathies Test includes targeted sequencing of 6 genes (KCNQ1, KCNH2, SCN5A, KCNE1, KCNE2, RYR2) and is performed in a CLIA-certified commercial laboratory that meets all applicable state and federal guidelines.
Did the authors exclude mutations in nDNA-located genes which have been shown to cause dCMP, such as MYH7 , MYBPC3 , LMNA , TNNI3 , TNNT2 , ACTC1 , TPM1 , SCN5A , MYL2 , MYH6 , MYL3 , PLEKHM2 , HAND1 , RBM20 , FBXO32 , DES , YBPC3 , MYPN , and PRKAG2 ?
current in isolated myocytes partially through the downregulation of SCN5A transcription [35].
Six exons had low coverage in all samples examined by all methods [APOB (apolipoprotein B) exon 1, KCNH2 exon 13, KCNQ1 (potassium voltage-gated channel, KQT-like subfamily, member 1) exon 1, RYR1 (ryanodine receptor 1 [skeletal]) exon 90, SCN5A (sodium channel, voltage-gated, type V, [alpha] subunit) exon 1, TGFBR1 (transforming growth factor, [beta] receptor 1) exon 1].
Over 160 mutations in the SCN5A gene have been discovered to date, each having varying mechanisms and effects on function, thereby explaining the varying degrees of penetration and expression of this disorder.
Genetic testing subsequently revealed a LQT3 genotype with a mutation in the SCN5A gene.