title: Interleukin-6 -174 promoter polymorphism does not influence IL-6 production after LPS and IL-1 beta stimulation in human umbilical cord vein endothelial cells.
abstract: The IL-6 is a typical pleiotropic cytokine, which regulates T cell response, B cell differentiation and immunoglobulin production. Endothelial cells can produce large amounts of IL-6. SNP at position -174 (G/C) in the IL-6 promoter region was found to be associated with a series of complex diseases. In this study we analyzed whether IL-6 -174 G/C polymorphism has any effect on IL-6 production of in vitro cultured HUVECs. Thirty-three fresh umbilical cords were recruited from healthy pregnancies. The endothelial cells isolated from human umbilical cords were genotyped for IL-6 -174 SNP. C allele frequency was 0.379. The IL-6 production of each primary HUVEC line was measured after IL-1beta or LPS treatment by ELISA. Serial dilutions of the stimulating agents were applied and maximum amount of produced IL-6 (R(max)) and stimulator concentrations at half-maximal IL-6 response (MR(50)) were calculated for each of the cell lines. IL-6 production was not associated with IL-6 -174 SNP genotypes or with presence of C allele. Our results showed that IL-6 production of HUVEC after proinflammatory stimulation was not influenced by IL-6 -174 SNP. Further functional studies are required to compare differences and similarities in IL-6 -174 SNP dependent expression of IL-6 among various cell types.
authors.affiliation: 3rd Department of Internal Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Petra
authors.initials: P
authors.lastname: Kiszel
authors.forename: Veronika
authors.initials: V
authors.lastname: Makó
authors.forename: Zoltán
authors.initials: Z
authors.lastname: Prohászka
authors.forename: László
authors.initials: L
authors.lastname: Cervenak
mesh_terms: D020413:3' Untranslated Regions / Q000235:genetics; D002478:Cells, Cultured; D004730:Endothelium, Vascular / Q000166:cytology / Q000378:metabolism*; D005787:Gene Frequency; D006801:Humans; D053583:Interleukin-1beta / Q000502:physiology*; D015850:Interleukin-6 / Q000096:biosynthesis* / Q000235:genetics; D008070:Lipopolysaccharides / Q000494:pharmacology*; D020641:Polymorphism, Single Nucleotide; D011401:Promoter Regions, Genetic; D014470:Umbilical Cord / Q000166:cytology*; D014471:Umbilical Veins / Q000166:cytology*
chemical_list: D020413:3' Untranslated Regions; D053583:Interleukin-1beta; D015850:Interleukin-6; D008070:Lipopolysaccharides