Evaluation of the Effects of 1,25 Vitamin D3 on Regulatory T Cells and T Helper 17 Cells in Vitamin D-deficient Women with Unexplained Recurrent Pregnancy Loss

Author(s): Elham Abdollahi, Seyed Abdolrahim Rezaee, Nafiseh Saghafi, Maryam Rastin, Vicki Clifton, Amirhossein Sahebkar, Houshang Rafatpanah*

Journal Name: Current Molecular Pharmacology

Volume 13 , Issue 4 , 2020


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Abstract:

Background: Vitamin D insufficiency and deficiency can be associated with adverse effects on pregnancy outcomes, which may include recurrent pregnancy loss through the mechanisms that are yet unknown. The aim of this study was to evaluate the effect of 1,25VitD3 on regulatory T cells (Tregs) and T helper17 (Th17) cell populations In vitro in unexplained recurrent pregnancy loss (URPL) patients and healthy women.

Methods: Samples from 20 non-pregnant women with a history of URPL were compared to 20 normal non-pregnant women. Peripheral blood mononuclear cells (PBMC) were divided into 3 wells for each subject: in the presence of 1, 25 VitD3 (50 nM, for 16 hours), PHA (positive control) (10μM), and without any treatment (as a baseline or negative control). The percentage of regulatory T cells and Th17 cells was measured by flow cytometry at baseline and then after cell culture experiments.

Results: Our study indicated that the percentage of Tregs in patients with URPL was significantly lower than the control group (2.42 ± 0.27 vs. 3.41 ± 0.29, P= 0.01). The percentage of Th17 cells was significantly greater in URPL patients compared to the control group (2.91 ± 0.33 vs. 1.18± 0.15, P=0.001). 1, 25VitD3 treatment significantly increased the percentage of Tregs from the baseline in the URPL group compared to that in the control group (1.23 ± 0.03 vs. 1.00 ± 0.03, P= 0.01).

Conclusion: Vitamin D deficiency may be a contributor to recurrent pregnancy loss and suggests supplementation of women with Vit D pre-pregnancy may be protective against URPL.

Keywords: Recurrent Pregnancy Loss, tregs, Th17 cells, 1, 25vitD3, cell culture, cytometry analysis.

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VOLUME: 13
ISSUE: 4
Year: 2020
Published on: 02 November, 2020
Page: [306 - 317]
Pages: 12
DOI: 10.2174/1874467213666200303130153
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