Abstract：
:Sudden unexplained nocturnal death syndrome (SUNDS) is a conundrum to both forensic pathologists and physicians, more than 80% of which the molecular pathogenesis remains unclear. Reported studies on both clinical and genetic phenotypes suggest SUNDS is related to congenital and acquired arrhythmias. Recent researches have linked the mutations of gene gap junction alpha 1 (GJA1) with arrhythmogenic cardiac disorders. In the present study, we investigate the potential correlation between GJA1 gene variations and the occurrence of SUNDS. Genomic DNA was extracted from the blood samples of both 124 sporadic SUNDS patients and 125 healthy controls to screen GJA1 gene for candidate variants using polymerase chain reaction (PCR) and direct DNA sequencing. One novel homozygous variant c.169C>T and one heterozygous SNP c.624C>T (rs530633057) were determined in 124 SUNDS cases (one case for each detected variant) and none of the 125 healthy controls. Base C>T transition at nucleotide position 169 led to termination of protein production after glutamine (Q) at codon 57 which is very likely to result in decreased expression of Cx43 gap junction channels and cause arrhythmic sudden death. This is the first report of GJA1 gene variations in SUNDS in the Chinese Han population, which suggests a novel susceptibility gene for Chinese SUNDS.
journal_name
Forensic Sci Intjournal_title
Forensic science internationalauthors
Wu Q,Wu Y,Zhang L,Zheng J,Tang S,Cheng Jdoi
10.1016/j.forsciint.2016.12.006subject
Has Abstractpub_date
2017-01-01 00:00:00pages
178-182eissn
0379-0738issn
1872-6283pii
S0379-0738(16)30536-9journal_volume
270pub_type
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