Prediction of pregnancy outcomes in patients with cervical insufficiency undergoing cervical cerclage

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Abstract

Objective: To assess the clinical significance of interleukin (IL-6 and IL-8, and matrix metalloproteinase-8 (MMP-8) in predicting pregnancy outcomes in patients with cervical insufficiency (CI) undergoing cervical cerclage.

Materials and methods: This prospective cohort study included 67 pregnant women with CI. Women were divided into two groups based on the timing of their subsequent deliveries. Group 1 comprised 30 (44.8%) pregnant women who gave birth before 32 weeks, whereas Group 2 included 37 (55.2%) women who gave birth after 32 weeks. During the vaginal speculum examination, cervical mucus was collected from the cervical canal before the cerclage procedure to determine the concentrations of IL-6, IL-8, and MMP-8.

Results: In Group 1, the concentrations of IL-6, IL-8, and MMP-8 were 12.3 pg/ml, 261.0 pg/ml, and 28.5 ng/ml, respectively. In Group 2, the concentrations were 6.4 pg/ml, 102.3 pg/ml, and 12.3 ng/ml for IL-6, IL-8, and MMP-8, respectively. The threshold values for each marker were determined by ROC analysis. The threshold concentrations at the cut-off point were 11.3 pg/ml, 202.6 pg/ml, and 22.3 ng/ml for IL-6, IL-8, and MMP-8, respectively.

Conclusion: Our study revealed that in patients with CI who delivered after 32 weeks, the levels of immunological markers were significantly higher than those in patients who delivered later. Unfavorable pregnancy outcomes with delivery before 32 weeks of gestation were predicted at levels of IL-6, IL-8, and MMP-8 ≥ 11.3 pg/ml, ≥ 202.6 pg/ml, and ≥ 22.3 ng/ml, respectively. Cervical cerclage is considered ineffective in these patients.

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About the authors

Svetlana V. Pesegova

I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)

Email: pesegova_s_v@staff.sechenov.ru
ORCID iD: 0000-0002-1339-5422

Teaching Assistant, Department of Obstetrics, Gynecology and Perinatology of the Institute of Clinical Medicine

Russian Federation, Moscow

Elena V. Timokhina

I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)

Email: elena.timokhina@mail.ru
ORCID iD: 0000-0001-6628-0023

Dr. Med. Sci., Professor, Department of Obstetrics, Gynecology and Perinatology of the Institute of Clinical Medicine

Russian Federation, Moscow

Alexander N. Strizhakov

I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)

Email: kafedra-agp@mail.ru

Academician of the RAS, Professor, Honored Head of the Department of Obstetrics, Gynecology and Perinatology of the Institute of Clinical Medicine

Russian Federation, Moscow

Irina V. Ignatko

I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)

Email: ignatko_i_v@staff.sechenov.ru

Dr. Med. Sci., Professor, Department of Obstetrics, Gynecology and Perinatology of the Institute of Clinical Medicine

Russian Federation, Moscow

Vera S. Belousova

I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)

Email: belousova_v_s@staff.sechenov.ru
ORCID iD: 0000-0001-8332-7073

student

Russian Federation, Moscow

Valeria M. Anokhina

I.M. Sechenov First Moscow State Medical University, Ministry of Health of Russia (Sechenov University)

Author for correspondence.
Email: elena.timokhina@mail.ru

student

Russian Federation, Moscow

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Supplementary files

Supplementary Files
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1. JATS XML
2. Figure. ROC curves of the probability of developing PR before 32 weeks of gestation depending on the levels of IL-6, IL-8, and MMP-8 in cervical mucus in patients with SCI before cervical cerclage

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