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Preeclampsia serum upregulates CD40/CD40L expression and induces apoptosis in human umbilical cord endothelial cells
Chun-feng Wu1, Fu-dan Huang, Ren-fang Sui
1Department of Gynecology and Obstetrics, the First Affiliated Hospital, Harbin Medical University, Harbin 150001, PR China.
Insights
Preeclampsia (PE) serum may damage endothelial cells by increasing CD40/CD40L expression, impacting cell growth and apoptosis. Further research is needed to identify the specific factors in PE serum responsible for these effects.
Area of Science:
- Obstetrics and Gynecology
- Vascular Biology
- Immunology
Background:
- Endothelial cell dysfunction is a hallmark of preeclampsia (PE).
- CD40/CD40L signaling is implicated in endothelial cell dysfunction.
- The specific role of CD40/CD40L in PE pathogenesis requires further elucidation.
Purpose of the Study:
- To investigate the role of CD40/CD40L signaling in preeclampsia pathogenesis.
- To compare the effects of maternal serum from PE patients and healthy controls on endothelial cells.
- To assess the impact of PE serum on human umbilical vein endothelial cell (HUVEC) growth, apoptosis, and CD40/CD40L expression.
Main Methods:
- Maternal serum was collected from 20 PE patients and 20 healthy pregnant women.
- HUVECs (CRL1730) were cultured with maternal serum for 24, 48, and 72 hours.
- Cell growth, apoptosis, and CD40/CD40L expression (protein and mRNA) were analyzed using MTT assays, flow cytometry, and RT-PCR.
Main Results:
- PE serum significantly altered HUVEC morphology, reduced cell growth, and increased apoptosis compared to control serum.
- PE serum markedly elevated CD40/CD40L protein and mRNA expression in HUVECs.
- The stimulatory effect of PE serum on CD40/CD40L expression was most pronounced at 24 hours.
Conclusions:
- Maternal serum from PE patients may induce endothelial cell damage via enhanced CD40/CD40L expression, particularly in early-onset PE.
- Increased CD40/CD40L signaling is a potential mechanism contributing to endothelial dysfunction in preeclampsia.
- Further studies are warranted to identify the specific serum factors driving these endothelial changes in PE.
Background:
The endothelial cell dysfunction observed in preeclampsia (PE) may be induced by CD40/CD40L signaling. This study investigated the role of CD40/CD40L in the pathogenesis of PE by comparing the effect of maternal serum obtained from healthy pregnant women and PE patients on HUVEC cell growth, apoptosis and CD40/CD40L expression.
Methods:
Maternal serum was obtained from 20 patients with PE (PE group) as well as 20 healthy pregnant women (control group). The human umbilical endothelial cell line, CRL1730, was cultured in the presence of maternal serum for 24, 48, and 72 h after which cell growth and apoptosis were assessed by MTT and flow cytometry analysis, respectively. CD40/CD40L expression was determined using flow cytometry and RT-PCR analyses.
Results:
As compared to CRL1730 cells treated with control sera, those treated with PE sera had altered morphology, decreased cell growth, increased apoptosis and greater CD40/CD40L protein and mRNA expression. Stimulation of CD40/CD40L protein and mRNA expression by PE sera was greatest at 24 h.
Conclusions:
PE sera may induce endothelial cell damage possibly through increased CD40/CD40L expression in early-onset PE. Further studies are necessary to determine the factor(s) in PE sera responsible for the observed changes in endothelial cell viability.
