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Flow cytometric investigation of CD40-CD40 ligand system in preeclampsia and normal pregnancy
Tzvetan Hristoforov Lukanov1, Svetla Ivanova Bojinova, Vanya Slavcheva Popova
1Immunology Laboratory, University Hospital, Pleven, Bulgaria. Bulgarialukanovtz@abv.bg
Insights
Preeclampsia is linked to an activated CD40-CD40 ligand system, indicated by increased CD40L and CD62P on platelets and CD40 on monocytes. This activation may contribute to the inflammation and clotting seen in preeclampsia.
Area of Science:
- Immunology
- Obstetrics
- Hematology
Background:
- Preeclampsia involves a pro-inflammatory and pro-thrombotic state.
- The CD40-CD40 ligand (CD40L) system plays a role in immune and vascular responses.
- CD62P and platelet-monocyte aggregates are associated with the CD40-CD40L system.
Purpose of the Study:
- To investigate the CD40-CD40 ligand system in preeclamptic women.
- To assess CD62P expression and platelet-monocyte aggregates in preeclampsia.
- To determine the relationship between CD40-CD40L system activation and preeclampsia pathophysiology.
Main Methods:
- Flow cytometry was used to analyze whole blood samples.
- Expression of CD40L and CD62P on platelets was measured.
- Expression of CD40 on monocytes and platelet-monocyte aggregates was quantified.
Main Results:
- Preeclamptic women exhibited significantly higher CD40L and CD62P on platelets compared to controls (P < .001).
- Monocyte CD40 expression was significantly elevated in preeclamptic women (P < .001).
- Platelet-monocyte aggregates were significantly increased in preeclamptic and normotensive pregnant women versus nonpregnant women (P < .001, P = .003).
Conclusions:
- Preeclampsia is associated with activation of the CD40-CD40 ligand system.
- This activated system may contribute to the inflammatory and thrombotic environment in preeclampsia.
- Further research is warranted to explore therapeutic targeting of this pathway.
Abstract:
Our aim was to investigate the CD40-CD40 ligand system in preeclamptic women. We also studied CD62P and platelet-monocyte aggregates, which have been closely linked to the CD40-CD40L system. Platelet expression of CD40L and CD62P and expression of CD40 on monocytes and platelet-monocyte aggregates were determined by flow cytometry in whole blood from 23 preeclamptic women, 23 normotensive pregnant women, and 23 nonpregnant women. The preeclamptic women showed a significant increase in CD40L and CD62P on platelets and in CD40 on monocytes when compared with normotensive pregnant women and nonpregnant women (all P < .001). There was a significant increase in platelet-monocyte aggregates in preeclamptic women (P < .001) and normotensive pregnant women (P = .003) compared with nonpregnant women. Preeclampsia is associated with activation of the CD40-CD40L system. The activation of this system may contribute to the development or maintenance of the proinflammatory and prothrombotic milieu found in preeclampsia.
