IL-1β, IL-6 promoter, INF-α promoter and IL-1RA gene polymorphisms and the risk of preterm delivery due to preterm premature rupture of membranes in a population of Polish women

Introduction: Our previous study revealed that anti-inflammatory cytokine gene polymorphisms increase the risk of spontaneous preterm delivery (PD) in a population of Polish women Different genetic background of PD due to preterm premature rupture of membranes (pPROM) than PD without pPROM has been suggested The aim of this study was to examine the relationship between the maternal carriage of polymorphic alleles of the following genes interleukin 1 beta(IL-1 beta [+3953C>T]), interleukin 6 promoter (IL-6 [-174G>CI), tumour necrosis factor promoter (TNF-alpha [-308G>A]) and interleukin 1 receptor antagonist (IL-1RN) and the risk of PD caused exclusively by pPROM in a population of Polish women Material and methods: A case-control study 95 Caucasian women were examined including 32 cases and 63 controls Case subjects experienced a delivery at less than 36 weeks and 6 days of gestation due exclusively to pPROM while control subjects gave birth at term Polymorphisms were determined by polymerase chain reaction-restriction fragment length polymorphism analysis (PCR-RFLP) Results No statistically significant relationship between polymorphisms of examined genes and risk of PD due to pPROM in a population of Polish women was found OR = 0 84 (95% Cl 0 34-2 01) for OR = 0 77 (95% Cl 0 27-2 13) for IL-6, OR = 0 72 (95% Cl - 0 26-1.90) for INF-alpha and OR = 174 (95% Cl 0 66-4 64) for IL-1RN Conclusions: Maternal carriage of polymorphic alleles of IL-1 beta, IL-6 promoter, TNF-alpha promoter and IL-IRA seems to have no impact on the risk of PD due to pPROM in the population of Polish women The genetic contribution and pathomechanism of PD related to pPROM seems to differ from those of spontaneous PD without pPROM