title: TNF-alpha and IL-10 gene polymorphisms versus cardioimmunological responses in sudden infant death.
abstract: We hypothesized that genetic variations of cytokines could contribute to the risk of developing a fatal immunological reaction in the heart of infants. Thus, tumor necrosis factor (TNF)-alpha and interleukin (IL)-10 gene polymorphisms versus induction of cardioimmunologxical responses in victims of sudden infant death syndrome (SIDS) were explored. We genotyped 35 infants (23 cases of SIDS and 12 infants with a known cause of death), and 100 healthy adult controls for IL-10 -1082 G/A, -592 C/A and TNF-alpha-238 G/A, -308 G/A. We found a higher frequency of the ATA haplotype and ATA/ATA genotype of IL-10 associated with SIDS (13%). The frequency of homozygote infants for IL-10 haplotypes in SIDS was higher (52%) than the control group (34%). All SIDS cases were homozygotice for the TNF-alpha-238 G allele and 20 infants were homozygous for the TNF-alpha-308 G allele in the same group. None of the infants with higher levels of infiltrated T-cells (n=8) was homozygous for IL-10 gene polymorphisms, whereas in contrast 3 cases of the 6 that displayed higher levels of cardiac mast cells were homozygous. In this study, the increased number of interstitial T-cells, mast cells, and macrophages in the myocardial interstitium demonstrated no correlation with the genotype for either cytokines.
authors.affiliation: National Board of Forensic Medicine, Department of Forensic Medicine, Linköping Division, Linköping , Sweden.
authors.forename: Nasrin
authors.initials: N
authors.lastname: Perskvist
authors.forename: Karin
authors.initials: K
authors.lastname: Skoglund
authors.forename: Erik
authors.initials: E
authors.lastname: Edston
authors.forename: Gerd
authors.initials: G
authors.lastname: Bäckström
authors.forename: Iréne
authors.initials: I
authors.lastname: Lodestad
authors.forename: Ulla
authors.initials: U
authors.lastname: Palm
mesh_terms: D000328:Adult; D000483:Alleles; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D018414:CD8-Positive T-Lymphocytes / Q000276:immunology; D016022:Case-Control Studies; D005260:Female; D005787:Gene Frequency; D006239:Haplotypes; D006720:Homozygote; D006801:Humans; D007150:Immunohistochemistry; D007223:Infant; D007231:Infant, Newborn; D016753:Interleukin-10 / Q000235:genetics*; D008264:Macrophages / Q000276:immunology; D008297:Male; D008407:Mast Cells / Q000276:immunology; D009206:Myocardium / Q000276:immunology*; D011110:Polymorphism, Genetic; D011401:Promoter Regions, Genetic; D013398:Sudden Infant Death / Q000209:etiology*; D014409:Tumor Necrosis Factor-alpha / Q000235:genetics*
chemical_list: D014409:Tumor Necrosis Factor-alpha; D016753:Interleukin-10