Noncardiac genetic predisposition in sudden infant death syndrome

Genetics in Medicine : Official Journal of the American College of Medical Genetics
Belinda GrayElijah R Behr

Abstract

Sudden infant death syndrome (SIDS) is the commonest cause of sudden death of an infant; however, the genetic basis remains poorly understood. We aimed to identify noncardiac genes underpinning SIDS and determine their prevalence compared with ethnically matched controls. Using exome sequencing we assessed the yield of ultrarare nonsynonymous variants (minor allele frequency [MAF] ≤0.00005, dominant model; MAF ≤0.01, recessive model) in 278 European SIDS cases (62% male; average age =2.7 ± 2 months) versus 973 European controls across 61 noncardiac SIDS-susceptibility genes. The variants were classified according to American College of Medical Genetics and Genomics criteria. Case-control, gene-collapsing analysis was performed in eight candidate biological pathways previously implicated in SIDS pathogenesis. Overall 43/278 SIDS cases harbored an ultrarare single-nucleotide variant compared with 114/973 controls (15.5 vs. 11.7%, p=0.10). Only 2/61 noncardiac genes were significantly overrepresented in cases compared with controls (ECE1, 3/278 [1%] vs. 1/973 [0.1%] p=0.036; SLC6A4, 2/278 [0.7%] vs. 1/973 [0.1%] p=0.049). There was no difference in yield of pathogenic or likely pathogenic variants between cases and controls (1/278...Continue Reading

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Citations

Jan 14, 2021·Archives of Disease in Childhood. Education and Practice Edition·Lisa Jennifer Bryson, Shelagh Joss
Mar 4, 2021·Life·Serafina PerroneSusanna Esposito

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Methods Mentioned

BETA
exome sequencing
PCA

Software Mentioned

SPSS
InterVar
Ingenuity Variant Software

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