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Polymorphisms in the myeloid differentiation primary response 88 pathway do not explain low expression levels in sudden infant death syndrome
Author(s) -
Bjørnvall Christina Dybdrodt,
Opdal Siri H.,
Rognum Torleiv O.,
Ferrante Linda
Publication year - 2019
Publication title -
acta paediatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/apa.14696
Subject(s) - medicine , sudden infant death syndrome , allele , myeloid , genetic variation , pathogenesis , immunology , pediatrics , gene , genetics , biology , population , environmental health
Aim The aim of this study was to investigate if a range of known rare and common genetic variants in the Toll‐like receptor 4 (TLR4)/myeloid differentiation primary response 88 (MyD88) pathway were present or overrepresented in sudden infant death syndrome (SIDS) compared to controls. Methods Genetic variations in the genes encoding TLR4, MyD88 and Interleukin‐1 receptor‐associated kinase 4 were analysed. The subjects investigated included 158 SIDS cases with a median age of 15.25 weeks (2–47 weeks), 80 cases of infectious death with a median age of 24.9 weeks (0–285 weeks) and 199 adult controls with a median age of 50 years (11–86 years). The cases were collected in the years 1988–2017, and the autopsies were performed at the Department of Forensic Sciences at Oslo University Hospital, Oslo, Norway. Results The results showed that none of the genetic variants selected from the MyD88 pathway were associated with neither SIDS nor infectious death. Most of the rare genetic variants were homozygote for the common allele in all groups, while the rest revealed allelic variation. Conclusion The genetic variations investigated in this study did not appear to be involved in the pathogenesis of SIDS.