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Premature labour (PL) is one of the most actual and unsolved problem of obstetrics. There are many data in the li terature about the role of the disturbed ratio of pro- and antiinflammatory cytokines, neopterin in the implementation of PL. Many authors support the theory of the predominant fetus factor in the initiation of PL. The goal of our research is studying of the characteristics of the local immune status, neopterin and cortisol levels in various variants of preterm labour. Materials and methods . 77 patients were divided into 2 groups. The main group (52 pregnant women with PL) was also divided into 2 subgroups: the first (1A) subgroup consisted of 28 pregnant women with premature rupture of membranes (PROM) without regular labour contractions. Another subgroup (1B) was presented by 24 women with labour activity and unruptured amniotic sac (true PL). In the control group we included 25 women with term labour. The level of the expression of mRNA genes of a congenital immunity in a cervical canal by the test-system ImmunoQuantex (IL1B, IL10, IL18, TNF2, TLR4, GATA3, CD68, B2M), as well as serum levels of neopterin and cortisol. The results were analyzed by standard statistical methods. Results . There were no significant difference in the expression levels of most of the genes of innate immunity between the study groups (p > 0.05). The investigation of expression of TLR4, GATA3 genes in different types of PL revealed a significant decrease (p 0.05). The maximum cortisol level was found in the subgroup 1B (true PL), which is significantly higher than in the subgroup 1A (with PROM) and in the control group (p < 0.01). Conclusion . The difference in the state of local immune status in different variants of premature labour demonstrates different mechanisms of initiation of preterm labour. It is likely that the ratio of TLR4/GATA3 and index of inflammation determins the onset of preterm labour. The level of neopterin can be used as a marker of the onset of PL. The increase of cortisol determines the role of the fetus factor in the onset of labour.

The state of the local immune status, the content of neopterin and cortisol in different variants of preterm labor