Soluble triggering receptor expressed on myeloid cells 1 (sTREM-1) and polymorphic variants of TREM-1 in the development of multiple organ dysfunction syndrome after coronary artery bypass grafting

Abstract

The onset of critical complications (multiple organ dysfunction syndrome, MODS) after coronary artery bypass grafting is the result of severe stress response. The key etiopathological factor of the induction phase of the complex pathological process, which ultimately leads to dysfunction of organs and systems, is the dysfunction of the immune response. The characteristics of reactions of the immune system in a particular individual are genetically determined and realized through innate immunity activation. Aim. To determine the role of TREM-1 gene polymorphism through the changes of sTREM serum levels and their contribution to the development of multiple organ dysfunction syndrome after coronary artery bypass grafting.Materials and Methods. 132 patients with coronary atherosclerosis who had undergone coronary artery bypass grafting were included in the study. Of them, 30 patients had multiple organ dysfunction syndrome in the early postoperative period. sTREM serum levels were measured using enzyme immunoassay. Genotyping of polymorphic loci of the TREM-1 gene was performed with real-time allele-specific PCR using TaqMan system.Results. Significant differences in sTREM levels among patients with and without MODS were found. sTREM levels depend on the carriage of certain allelic variants in the three polymorphic loci of the TREM-1 gene (rs1817537, rs2234246, rs3804277)Conclusion. The relationships of the levels of the circulating soluble form of TREM-1 and the polymorphic variants of the coding TREM-1 gene with the severity of MODS were determined in coronary artery disease patients after coronary artery bypass grafting.

Keywords

• coronary artery disease
• multiple organ dysfunction syndrome
• coronary artery bypass grafting, innate immunity
• trem-1