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Related Concept Videos

Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl hydroxylase and factor...
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.
Mechanism of Angiogenesis01:10

Mechanism of Angiogenesis

Blood vessel formation starts early during embryonic development, around day 7. In the extraembryonic yolk sac, mesodermal precursor cells called hemangioblast proliferate and differentiate into angioblast. Angioblasts express vascular endothelial growth factor receptor 2 or VEGFR2, which binds VEGF-A, a proangiogenic factor, guiding blood vessel formation. VEGF signaling promotes angioblasts to form a blood island in the developing embryo. Angioblasts further differentiate, giving rise to...
Development of Blood Vessels01:07

Development of Blood Vessels

The development of the vascular system in a fetus is a complex and intricate process that begins as early as 15 to 16 days post-conception. This process starts outside the embryo, specifically in the mesoderm of the yolk sac, chorion, and connecting stalk. Approximately two days later, the formation of blood vessels occurs within the embryo itself.
The initial formation of this system is facilitated by the small amount of yolk present in the ovum and yolk sac. Blood vessels originate from...
Transducer Mechanism: Enzyme-Linked Receptors01:27

Transducer Mechanism: Enzyme-Linked Receptors

Enzyme-linked receptors are cell-surface receptors acting as an enzyme or associating with an enzyme intracellularly. They make excellent drug targets. Drugs can bind to the extracellular ligand-binding domain or directly affect their enzymatic domain and alter their activity.
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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,...

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Related Experiment Video

Updated: Jun 10, 2026

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

Published on: January 26, 2024

Pre-eclampsia: connecting angiogenic and metabolic pathways.

Vivek Shenoy1, Keizo Kanasaki, Raghu Kalluri

  • 1Division of Matrix Biology, Department of Medicine, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA 02215, USA.

Trends in Endocrinology and Metabolism: TEM
|July 22, 2010
PubMed
Summary

This review explores pre-eclampsia, a pregnancy hypertension affecting 5-8% globally. Research links it to angiogenic imbalance and metabolic dysfunction, particularly homocysteine and placental glycogen metabolism.

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Trophoblast Cell Recovery from Angiogenesis-Tube Formation Assay for Differentiation Marker Expression Analysis

Published on: November 8, 2024

Area of Science:

  • Obstetrics and Gynecology
  • Cardiovascular Research
  • Metabolic Disorders

Background:

  • Pre-eclampsia is a significant hypertensive disorder in pregnancy, affecting 5-8% worldwide.
  • Current understanding of pre-eclampsia pathogenesis is incomplete.
  • Recent research highlights potential links between angiogenic and metabolic pathways.

Purpose of the Study:

  • To review recent advancements in pre-eclampsia research.
  • To explore the roles of angiogenesis and metabolism in pre-eclampsia development.
  • To update existing models of pre-eclampsia pathogenesis.

Main Methods:

  • Literature review focusing on angiogenesis and metabolism in pre-eclampsia.
  • Analysis of the 'angiogenic imbalance' theory involving factors like sFlt1, 2-ME, and COMT.
  • Examination of the association between pre-eclampsia and homocysteine/placental glycogen metabolism.

Main Results:

  • The 'angiogenic imbalance' theory suggests pre-eclampsia arises from dysregulated angiogenesis.
  • Specific factors implicated include soluble fms-like tyrosine kinase (sFlt1), 2-methoxyestradiol (2-ME), and catechol-O-methyltransferase (COMT).
  • Dysfunctional metabolism of homocysteine and placental glycogen is associated with pre-eclampsia.

Conclusions:

  • Angiogenesis and metabolism are interconnected in pre-eclampsia pathogenesis.
  • Understanding these links can refine existing models of the disease.
  • Further research into these pathways may reveal new therapeutic targets.