Association of common and rare variants of SCN10A gene with sudden unexplained nocturnal death syndrome in Chinese Han population.
Sudden unexplained nocturnal death syndrome (SUNDS) remains an autopsy negative entity with unknown etiology to both forensic pathologists and physicians. The electrocardiogram (ECG) characteristics and clinical phenotype of SUNDS survivors strongly suggest that SUNDS shares some similarities with Brugada syndrome (BrS). Recently, the variants of sodium channel Nav1.8 coding gene SCN10A were identified to be associated with BrS. Here, we investigated the association of SCN10A gene variants with 105 sporadic SUNDS victims and 22 BrS cases in the Chinese Han population. A total of 6 rare mutations and 16 polymorphisms were detected in SUNDS victims. Of the six rare mutations, two were putative pathogenic mutations (F386C and R1263*), one was a likely pathogenic mutation (R14H), and the other three were predicted as benign (R817Q, T1181M, and P1683S). As for the 16 polymorphisms, 1 was a novel polymorphism (c.4144-84G>A) located in intron 24, and the rest were reported previously including one polymorphism (c.2884A>G [I962V]) which showed a statistically significant difference in allele frequency (p = 0.044) between SUNDS and the control group. There were also 5 rare mutations and 15 polymorphisms detected in BrS cases. This is the first report of common and rare variants of SCN10A gene in SUNDS and BrS in the Chinese Han population, which provides the genetic epidemiological evidence that SCN10A may be a novel susceptibility gene for SUNDS and account for approximately 3 % of SUNDS in China.
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China.
Liyong
L
Zhang
Detachment of Traffic Police, Public Security Bureau of Dongguan City, Dongguan, GD, 523000, China.
Feng
F
Zhou
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China.
Lei
L
Huang
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China.
Qiuping
Q
Wu
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China.
Jinxiang
J
Zheng
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China.
Yeda
Y
Wu
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China.
Kun
K
Yin
Department of Forensic Pathology, Zhongshan School of Medicine, Sun Yat-sen University, No. 74, Zhongshan 2nd Road, Guangzhou, Guangdong, 510080, China. chengjd@mail.sysu.edu.cn.
Jianding
J
Cheng
D000293:Adolescent; D000328:Adult; D053840:Brugada Syndrome / Q000235:genetics; D002681:China; D018389:Codon, Nonsense; D003645:Death, Sudden / Q000209:etiology*; D005006:Ethnicity / Q000235:genetics; D005787:Gene Frequency; D020022:Genetic Predisposition to Disease; D005838:Genotype; D006801:Humans; D008875:Middle Aged; D020125:Mutation, Missense; D062559:NAV1.8 Voltage-Gated Sodium Channel / Q000235:genetics*; D016133:Polymerase Chain Reaction; D020641:Polymorphism, Single Nucleotide; D055815:Young Adult
D018389:Codon, Nonsense; D062559:NAV1.8 Voltage-Gated Sodium Channel; C568317:SCN10A protein, human
Brugada syndrome; SCN10A gene; Sudden unexplained nocturnal death syndrome (SUNDS)