Abstract
Purpose
Progesterone receptor membrane component 1 (PGRMC1) have anti-inflammatory and anti-apoptotic properties. This study aimed to determine the expression of PGRMC1 in fetal membranes among women with preterm labor (PTL), preterm premature rupture of membranes (PPROM), and acute histologic chorioamnionitis (HCA) during preterm birth.
Methods
Full thickness fetal membranes were obtained from women with gestational age-matched (32–34 weeks of gestational age), and categorized as PTL without HCA (PTL, n = 10), PPROM without HCA (PPROM, n = 10), PPROM with HCA (HCA, n = 10), and term without labor and HCA (term birth (TB), n = 9). The expression of PGRMC1 was assessed using western blot and Immunohistochemistry (IHC). As CD14 is a component of the innate immune system during inflammation, CD14 was used as inflammatory indicator. Nonparametric statistics were used for analysis.
Results
PGRMC1 expression for all of preterm birth was lower than in TB (P = 0.01). In HCA, PGRMC1 expression was significantly decreased compared to that in PTL and PPROM (P = 0.006. P = 0.001, respectively). PGRMC1 expression in PPROM was higher than that in PTL (P = 0.002). There was a negative correlation between PGRMC1 and CD 14/β-actin ratio (r = − 0.518; P = 0.002). IHC showed that PGRMC1 was predominant in the cytoplasm of cells, these results were consistent with those of the western blot analysis.
Conclusion
Preterm birth with PTL, PPROM, and especially HCA is associated with a decreased PGRMC1 in fetal membranes and inversely associated with increased CD 14.
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Acknowledgements
We would like to thank Ji Young Seo for laboratory work.
Funding
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government [No. 2017R1D1A1B03029882].
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SRC: Protocol/Project development, Data collection and analysis, Manuscript writing. HEC, EJ, HYC, SJ and SJ: collect the fetal membranes. SJC: examin histologic findings and IHC staining of fetal membranes. SOH: Manuscript editing.
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Choi, S.R., Choi, H.E., Jo, E. et al. Decreased expression of progesterone receptor membrane component 1 in fetal membranes with chorioamnionitis among women with preterm birth. Arch Gynecol Obstet 301, 949–954 (2020). https://doi.org/10.1007/s00404-020-05476-8
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DOI: https://doi.org/10.1007/s00404-020-05476-8