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Related Concept Videos

Hormonal Regulation01:33

Hormonal Regulation

The renin-aldosterone system is an endocrine system which guides the renal absorption of water and electrolytes, thus managing blood pressure and osmoregulation. Activation of the system begins in the kidneys with a small cluster of cells adjacent to the afferent and efferent blood vessels of the renal corpuscle. As the nephrons are filtering blood, juxtaglomerular cells monitor blood pressure. If they detect a decrease in pressure, they release the hormone renin into the bloodstream.
Pathophysiology of Diabetes01:20

Pathophysiology of Diabetes

Diabetes mellitus is a chronic metabolic disorder characterized by hyperglycemia. The four categories of diabetes are type 1 diabetes, type 2 diabetes, other specific types of diabetes, and gestational diabetes.
Type 1 diabetes is characterized by autoimmune-mediated destruction of pancreatic β cells, with environmental factors potentially triggering this process in genetically susceptible individuals. Despite many not having a family history, certain genes increase susceptibility, suggesting a...
Acute Pancreatitis II: Pathophysiology01:21

Acute Pancreatitis II: Pathophysiology

The pathophysiology of acute pancreatitis centers on injury to pancreatic acinar cells, which initiates a cascade of harmful intracellular events.This injury leads to premature activation of trypsinogen to trypsin in the pancreas. Trypsin then activates other digestive enzymes, such as chymotrypsin, elastase, and phospholipase A2, which begin breaking down pancreatic tissue. The resulting autodigestion causes local inflammation, tissue swelling, hemorrhage, and fat necrosis.Injured acinar cells...
Hypertension II: Pathophysiology01:29

Hypertension II: Pathophysiology

Hypertension is a chronic condition in which the blood's force against artery walls is excessively high, posing risks such as heart disease. The condition's underlying mechanisms involve complex interactions among the cardiovascular, kidney, and autonomic nervous systems.Renin-Angiotensin-Aldosterone System (RAAS): This system significantly influences blood pressure regulation. When blood pressure decreases, the kidneys secrete renin. This enzyme transforms angiotensinogen, a plasma protein,...
Teratogenicity01:07

Teratogenicity

The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...
Nephrotic Syndrome I : Introduction01:24

Nephrotic Syndrome I : Introduction

Nephrotic Syndrome is a chronic kidney disorder defined by clinical findings such as severe proteinuria, hypoalbuminemia, hyperlipidemia, and edema. These symptoms result from damage to the glomeruli, the kidney’s filtering units, increasing their permeability to proteins.Definition and Meaning:Proteinuria, defined as the loss of more than 3.5 grams of protein per day in adults, is a crucial feature of nephrotic syndrome. This condition is often accompanied by edema, the accumulation of fluid...

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Transforming Preeclampsia Care: Molecular Diagnostics and Therapeutic Innovations.

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Correction: Zsengellér et al. Mitigating Oxidative Stress and Anti-Angiogenic State in an In Vitro Model of Preeclampsia by HY-12, an Organofluorine Hydrazone Antioxidant. <i>Curr. Issues Mol. Biol.</i> 2025, <i>47</i>, 680.

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Related Experiment Video

Updated: Jun 17, 2026

Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas
05:31

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

Published on: January 26, 2024

Pathogenesis of preeclampsia.

Brett C Young1, Richard J Levine, S Ananth Karumanchi

  • 1Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, Massachusetts 02215, USA.

Annual Review of Pathology
|January 19, 2010
PubMed
Summary

Preeclampsia, a pregnancy complication affecting 3-5% of women, involves high blood pressure and protein in urine. Understanding placental antiangiogenic factors offers hope for early detection and treatment.

Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Pathophysiology

Background:

  • Preeclampsia affects 3-5% of pregnancies, causing hypertension and proteinuria after 20 weeks gestation.
  • It is a major cause of maternal and neonatal morbidity and mortality.
  • Current management relies solely on placental delivery.

Purpose of the Study:

  • To review recent advances in understanding preeclampsia pathogenesis.
  • To highlight the role of placental antiangiogenic factors.
  • To explore potential diagnostic and therapeutic implications.

Main Methods:

  • Review of recent scientific discoveries and literature.
  • Analysis of the role of antiangiogenic factors in endothelial disruption.
  • Correlation of angiogenic imbalance with clinical manifestations of preeclampsia.

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Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
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Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

Published on: November 20, 2015

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Last Updated: Jun 17, 2026

Disruption of the Mouse Blood-Brain Barrier by Small Extracellular Vesicles from Hypoxic Human Placentas
05:31

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

Published on: January 26, 2024

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
07:36

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats

Published on: November 20, 2015

Main Results:

  • Upregulation of placental antiangiogenic factors disrupts maternal endothelium.
  • This imbalance contributes to hypertension, proteinuria, and HELLP syndrome.
  • The precise regulation of these factors in the placenta remains undetermined.

Conclusions:

  • Recent discoveries illuminate the pathogenesis of preeclampsia.
  • Upregulated antiangiogenic factors present potential biomarkers for prediction and diagnosis.
  • These factors offer promising targets for future therapeutic interventions.