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Flow cytometric assessment of endothelial and platelet microparticles in preeclampsia and their relation to disease
Objective:
Platelet (P) and endothelial (E) microparticle (MP) levels increase in preeclampsia. However, their relation to the severity of the disease needs to be clarified. The objectives of this study were to compare the levels of EMP and PMP in severe and mild preeclampsia to healthy gravidas to find possible correlations to severity of the disease, Doppler changes, and complications.
Methods:
A comparative prospective clinical trial (Canadian Task Force II-1) was conducted on 135 pregnant women divided into three groups: 35 women with severe preeclampsia (group 1), 40 with mild preeclampsia (group 2), and 60 healthy gravids (group 3). Assessment of EMP and PMP was done by flow cytometry using anti-CD31 and anti-CD42b antibodies.
Results:
Expression of CD31 and CD42b (EMPs) was higher in group 1 compared to groups 2 and 3 with P < 0.001, while expression of CD42b alone (PMPs) did not show a statistically significant difference (P = 0.957). EMPs were correlated positively to umbilical and middle cerebral artery resistance index. There was a significant negative correlation between platelet count and EMPs. Also, EMPs were correlated positively to aspartate transferase and bilirubin levels and were significantly higher with neonatal death.
Discussion:
The present study revealed a significant association between plasma levels of EMPs and severity of preeclampsia together with poor neonatal outcome as regards birth weight and percent of neonatal death. So, EMPs assay could be a good predictor of maternal and fetal outcomes and in cases with preeclampsia.
Insights
Endothelial microparticles (EMPs) are elevated in severe preeclampsia and correlate with disease severity and poor neonatal outcomes. EMPs may serve as a valuable predictor for maternal and fetal health in preeclampsia cases.
Area of Science:
- Obstetrics and Gynecology
- Cardiovascular Biology
- Neonatology
Background:
- Preeclampsia is a serious pregnancy complication characterized by elevated blood pressure.
- Platelet microparticles (PMPs) and endothelial microparticles (EMPs) are known to increase in preeclampsia.
- The relationship between microparticle levels and preeclampsia severity requires further investigation.
Purpose of the Study:
- To compare EMP and PMP levels in severe preeclampsia, mild preeclampsia, and healthy pregnancies.
- To investigate correlations between microparticle levels and preeclampsia severity, Doppler findings, and complications.
- To assess the potential of EMPs as a biomarker for preeclampsia severity and outcomes.
Main Methods:
- A prospective clinical trial involving 135 pregnant women categorized into severe preeclampsia (n=35), mild preeclampsia (n=40), and healthy controls (n=60).
- Microparticle levels (EMPs and PMPs) were quantified using flow cytometry with specific antibody markers (anti-CD31 and anti-CD42b).
Main Results:
- EMPs (CD31 and CD42b expression) were significantly higher in severe preeclampsia compared to mild preeclampsia and healthy controls (P < 0.001).
- PMPs (CD42b expression alone) did not show a significant difference between groups (P = 0.957).
- EMPs positively correlated with umbilical and middle cerebral artery resistance indices, and negatively with platelet count. Higher EMP levels were associated with increased aspartate transferase, bilirubin, and neonatal death.
Conclusions:
- Plasma EMP levels are significantly associated with preeclampsia severity.
- Elevated EMPs correlate with adverse neonatal outcomes, including lower birth weight and higher neonatal mortality.
- EMP assays show promise as predictive biomarkers for maternal and fetal outcomes in preeclampsia.
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