MiR-519d-3p from Placenta-Derived Exosomes Induce Immune Intolerance Regulating Immune Cells, Contributing to the Pathogenesis of Preeclampsia.

Background: MiR-519d-3p, also called specific placenta biomarkers, is a member of the Chromosome 19 miRNA Cluster (C19MC) with the highest concentrations of miRNAs in human placenta and maternal serum. These miRNAs are secreted by fetal trophoblast cells within extracellular vesicles (EVs) and interact with the mother's immune cells, which has been proposed to be crucial for immunological tolerance at the placental-maternal interface. A key mechanism in preeclampsia, a multifactorial, multipath hypertensive pregnancy illness, is an immunological imbalance between the mother and the fetus.

Clinical Application of High-Frame-Rate Vector Flow Imaging in Evaluation of Carotid Atherosclerotic Stenosis.

Objective: This study seeks to evaluate the value of the high-frame-rate vector flow imaging technique in assessing the hemodynamic changes of carotid atherosclerotic stenosis in aging people (>60 years old).

Methods: Aging patients diagnosed with carotid atherosclerotic stenosis who underwent carotid high-frame-rate vector flow imaging examination were prospectively enrolled. A Mindray Resona7s ultrasound machine equipped with high-frame-rate vector flow function was used for ultrasound evaluation.