Preprint Article Version 1 This version is not peer-reviewed

Unlocking the Puzzle: Investigating the Role of Interleukin 17 Genetic Polymorphisms, Circulating Lymphocytes, and Serum Levels in Venezuelan Women with Recurrent Pregnancy Loss

Version 1 : Received: 5 August 2024 / Approved: 5 August 2024 / Online: 6 August 2024 (02:58:13 CEST)

How to cite: Garmendia, J. V.; Blanca, I.; Peña, M. J.; De Sanctis, C. V.; De Sanctis, J. B. Unlocking the Puzzle: Investigating the Role of Interleukin 17 Genetic Polymorphisms, Circulating Lymphocytes, and Serum Levels in Venezuelan Women with Recurrent Pregnancy Loss. Preprints 2024, 2024080299. https://doi.org/10.20944/preprints202408.0299.v1 Garmendia, J. V.; Blanca, I.; Peña, M. J.; De Sanctis, C. V.; De Sanctis, J. B. Unlocking the Puzzle: Investigating the Role of Interleukin 17 Genetic Polymorphisms, Circulating Lymphocytes, and Serum Levels in Venezuelan Women with Recurrent Pregnancy Loss. Preprints 2024, 2024080299. https://doi.org/10.20944/preprints202408.0299.v1

Abstract

The immune response is crucial in Pregnancy Loss (RPL), which affects 1-2% of women. In RPL, peripheral blood lymphocytes and local immune cells are activated with a concomitant decrease in the leukocyte tolerogenic response in the uterus and decidua. IL-17 plays an essential role in T cell activation, weakening tolerogenic responses of the T cells. The report aims to analyze the IL-17 genetic polymorphism, circulating IL-17 lymphocyte populations, the reaction upon lymphocyte priming, the amount of cytokine in serum, and the number of T-reg cells in a group of 50 RPL and 50 normal women from the admixed Venezuelan population. No differences were observed in the genetic polymorphisms rs2275913 and rs763780. A significant decrease (P<0.001) was observed in RPL patients compared to controls in the IL-17+ cell populations CD3+, CD8+, CD56+, and CD4CD25 FoxP3, but not in the CD4IL17+ cells. The response upon cell priming was significantly decreased (P<0.001) in all subpopulations of RPL as compared to controls. It is concluded that despite the increase in IL-17A in the serum of patients, the number of circulating IL-17 cells and the lymphocyte response to stimulation was significantly decreased (p<0.001). No differences in the genetic polymorphism compared to controls suggest that biological factors influence IL-17 levels in RPL patients, which must be carefully studied.

Keywords

Recurrent pregnancy loss, IL-17; Th17; genetic polymorphism; T cell activation; T regulatory cells

Subject

Biology and Life Sciences, Immunology and Microbiology

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