Perinatal Immune Changes to Identify Patients at Risk of Postpartum Preeclampsia

Area of Science:

• Obstetrics and Gynecology
• Immunology
• Maternal-Fetal Medicine

Background:

• Postpartum preeclampsia (PPPE) is a serious maternal condition characterized by new-onset hypertension and end-organ damage after childbirth.
• Identifying individuals at high risk for PPPE before its clinical manifestation is crucial for timely intervention and improved maternal outcomes.
• Routine complete blood count (CBC) parameters reflect systemic immune status and may offer insights into pre-symptomatic PPPE development.

Purpose of the Study:

• To investigate whether perinatal immune changes, assessed through CBC, can predict the development of postpartum preeclampsia (PPPE).
• To identify specific CBC-derived immune markers associated with an increased risk of PPPE.

Main Methods:

• A retrospective matched case-control study involving 100 individuals with PPPE, 200 term pregnancies without preeclampsia (Ctrl), and 200 with antenatal preeclampsia (PE).
• Collection and statistical analysis of demographic, obstetrical, and laboratory data, including complete blood count (CBC) parameters.
• Utilized ANOVA, multivariate regression, and t-tests to compare immune profiles and identify significant associations with PPPE.

Main Results:

• Individuals who developed PPPE were older, predominantly Black, and had higher pre-pregnancy BMI and a history of hypertension/preeclampsia compared to controls.
• Before delivery, PPPE cases showed lower total leukocyte counts and elevated monocyte percentages compared to controls.
• Significant alterations in leukocyte ratios (elevated total leukocytes, neutrophils; decreased lymphocytes, monocytes) were observed in PPPE cases, even after adjusting for confounding factors.

Conclusions:

• Perinatal immune changes, detectable by routine CBC, are present in individuals before the onset of postpartum preeclampsia (PPPE).
• These immune alterations serve as potential biomarkers for identifying high-risk individuals for PPPE.
• Routine CBC monitoring during the perinatal period could aid in the early detection and management of PPPE.