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[Soluble adhesion molecules in patients with pre-eclampsia]
Insights
Circulating adhesion molecules like ICAM-1 and VCAM-1 are elevated in pre-eclampsia. These markers, intercellular adhesion molecule-1 and vascular cell adhesion molecule-1, remain stable during healthy pregnancies.
Area of Science:
- Obstetrics and Gynecology
- Immunology
- Cardiovascular Research
Context:
- Pre-eclampsia and HELLP syndrome are severe pregnancy complications with unclear etiology.
- Circulating adhesion molecules are implicated in endothelial dysfunction, a hallmark of these conditions.
- Understanding adhesion molecule dynamics is crucial for diagnosing and managing hypertensive disorders of pregnancy.
Purpose:
- To quantify plasma concentrations of specific adhesion molecules (ICAM-1, VCAM-1, E-selectin, P-selectin, PECAM-1) in women with pre-eclampsia, HELLP syndrome, and pregnancy-induced hypertension (PIH).
- To compare these levels against healthy pregnant controls.
- To establish longitudinal profiles of ICAM-1 and VCAM-1 in healthy pregnancies.
Summary:
- Plasma levels of intercellular adhesion molecule-1 (ICAM-1), vascular cell adhesion molecule-1 (VCAM-1), E-selectin, and PECAM-1 were significantly elevated in pre-eclampsia patients compared to healthy controls.
- ICAM-1 and VCAM-1 were also higher in pre-eclampsia than in PIH.
- P-selectin concentrations showed high variability, likely due to platelet activation.
- Longitudinal analysis revealed ICAM-1 and VCAM-1 are tightly regulated and stable throughout healthy pregnancy.
Impact:
- Identifies ICAM-1, VCAM-1, E-selectin, and PECAM-1 as potential biomarkers for pre-eclampsia.
- Provides reference ranges for adhesion molecules in healthy pregnancy, aiding differential diagnosis.
- Highlights the stability of ICAM-1 and VCAM-1 in non-pregnant and healthy pregnant states, underscoring their dysregulation in pre-eclampsia.
Abstract:
Plasma concentrations of the circulating adhesion molecules ICAM-1 (CD54), VCAM-1 (CD106) were determined in 31 women with pre-eclampsia, 9 women with HELLP syndrome, and 13 women with transient pregnancy induced hypertension (PIH). Data were compared with a control group of 157 healthy pregnant women of the same gestational age. Furthermore, concentrations of circulating E-selectin (CD62E), P-selectin (CD62P), and PECAM-1 (CD31) were determined in a subpopulation of 17 women with pre-eclampsia. Plasma concentrations of circulating ICAM-1, VCAM-1, E-selectin, and PECAM-1 were significantly elevated in women with pre-eclampsia compared to healthy control pregnant women. Circulating ICAM-1 and VCAM-1 levels were also significantly elevated in the pre-eclampsia group compared to women with PIH. Concentrations of circulating P-selectin varied strongly in all experimental groups (SD > 70% of the mean), most likely reflecting various degrees of thrombocyte degranulation in the individual samples. Finally, longitudinal profiles of cICAM-1 and cVCAM-1 concentrations were determined in 123 healthy pregnant women between the 16th and the 42nd week of gestation. This analysis identified cICAM-1 and cVCAM-1 as tightly regulated plasma parameters that varied in a small concentration range. Concentrations of cICAM-1 and cVCAM-1 did not vary during pregnancy and the determined concentrations corresponded to the reported reference levels of nonpregnant individuals.