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Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas

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[Clotting disorders and preeclampsia].

A-S Ducloy-Bouthors¹

¹Maternité Jeanne-de-Flandre, clinique d'anesthésie-réanimation, 2, avenue Oscar-Lambret, 59037 Lille cedex, France. asducloy@chru-lille.fr

Annales Francaises D'Anesthesie Et De Reanimation

|May 19, 2010

Summary

Severe pulmonary embolism (PE) in pregnancy involves clotting disorders and compensated hypercoagulability, often with thrombocytopenia. Early detection of these hemostatic disturbances is crucial for managing maternal and fetal complications.

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The 4-vessel Sampling Approach to Integrative Studies of Human Placental Physiology In Vivo

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Published on: August 2, 2017

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Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas

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Published on: January 26, 2024

The 4-vessel Sampling Approach to Integrative Studies of Human Placental Physiology In Vivo

The 4-vessel Sampling Approach to Integrative Studies of Human Placental Physiology In Vivo

Published on: August 2, 2017

Area of Science:

Obstetrics and Gynecology
Hematology
Pathophysiology

Context:

Pulmonary embolism (PE) in pregnancy presents significant risks, often linked to severe clotting disorders.
Compensated hypercoagulability states, characterized by thrombocytopenia (platelet count <150k/mm³), affect 25-50% of severe PE cases.
Maternal systemic inflammatory disease can exacerbate abnormal clotting activation.

Purpose:

To elucidate the hemostatic disturbances in pregnant patients with PE.
To identify early laboratory markers of platelet and endothelial activation.
To understand the pathophysiology of chronic disseminated intravascular coagulation (DIC) in PE.

Summary:

Severe PE is associated with hypercoagulability, thrombocytopenia, and markers of platelet/endothelial activation like increased fibronectin.
Physiological compensation involves elevated thrombin-antithrombin (TAT) complexes and decreased antithrombin (AT) activity.
Placental factors and erythrocyte/leukocyte activation contribute to the pro-coagulatory state, potentially leading to DIC with fetal or maternal complications.

Impact:

Early detection and understanding of DIC etiology in PE can guide prophylactic and curative treatments.
Frequent laboratory monitoring is essential due to the dynamic nature of these hemostatic changes.
Delivery is the only definitive treatment for these pregnancy-related hemostatic disturbances.