Abstract
Background
The invasion of trophoblast cells into the maternal uterine decidua is crucial for the formation of the placenta and establishment of pregnancy. Stromal cell-derived factor-1 (SDF-1) regulates cellular functions such as migration, adhesion, and proliferation. During pregnancy, both SDF-1 and its receptor CXCR4 are expressed in the placenta. Abnormal expression of the SDF-1 system has been linked to pregnancy disorders such as pre-eclampsia.
Objective
The purpose of this study was to investigate the effect of SDF-1/CXCR4 signaling on trophoblast cells and the related molecular mechanism(s).
Results
The invasiveness of HTR8/SVneo human trophoblast cells was stimulated by extracellular SDF-1. SDF-1 activated the phosphatidylinositol 3-kinase (PI3K)/AKT and mitogen-activated protein kinase (MAPK) signaling pathways. The ability of SDF-1 to stimulate HTR8/SVneo cell invasion was blocked in the presence of a PI3K inhibitor (wortmannin), an ERK1/2 MAPK inhibitor (U0126), or a P38 MAPK inhibitor (SB203580). The expression of the matrix metalloproteinase (MMP)-2 and MMP-9 genes increased in SDF-1-treated HTR8/SVneo cells, and the up-regulation of MMPs expression was inhibited by blocking the SDF-1 receptor. Additionally, SDF-1 treatment increased MMP-2 and MMP-9 protein levels in HTR8/SVneo cells, and the increase of MMP-2 and MMP-9 was reduced by inhibiting the PI3K and/or MAPK intracellular signaling pathway.
Conclusion
These findings provide evidence that appropriate SDF-1-mediated signaling pathways contribute to the regulation of trophoblast invasiveness into the endometrium.
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Data availability
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgements
This research was supported by Regional Innovation Strategy (RIS) through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE) (2022RIS-005) and by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (2021R1I1A3060225).
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YB performed the experiments and analyzed the data. JK analyzed and reviewed the data. WJ performed the experiments and wrote the manuscript.
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Yeongju Bae, Jiho Jang, Han-Soo Kim, Wooyoung Jeong declare that they have no conflicts of interest.
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Bae, Y., Jang, J., Kim, HS. et al. Blockade of stromal cell-derived factor-1 signaling disturbs the invasiveness of human extravillous trophoblast cells. Mol. Cell. Toxicol. 20, 307–314 (2024). https://doi.org/10.1007/s13273-023-00344-3
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DOI: https://doi.org/10.1007/s13273-023-00344-3