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Hormonal Regulation01:33

Hormonal Regulation

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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.
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Smooth endoplasmic reticulum or smooth ER is a sub-organelle with specialized functions in animal cells and plant cells. It is often associated with the tubule morphology of the endoplasmic reticulum.
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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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Amyloid Fibrils03:03

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Related Experiment Video

Updated: Oct 15, 2025

Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles
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Author Spotlight: Modeling an Aspect of Preeclampsia in Female Mice Using Hypoxic Human Placenta-Derived Small Extracellular Vesicles

Published on: January 26, 2024

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Pathological AT1R-B2R Protein Aggregation and Preeclampsia.

Ursula Quitterer1,2, Said AbdAlla1

  • 1Molecular Pharmacology, Department of Chemistry and Applied Biosciences, ETH Zurich, Winterthurerstrasse 190, CH-8057 Zürich, Switzerland.

Cells
|October 23, 2021
PubMed
Summary

Preeclampsia, a severe pregnancy complication, involves hypertension and kidney dysfunction. Targeting abnormal protein complex formation in G-protein-coupled receptors offers a new experimental treatment approach.

Keywords:
AGTR1 (angiotensin II receptor type 1)ARRB (beta-arrestin)AT1R-B2R heteromer (protein complex formed of AT1R-B2R)BDKRB2 (bradykinin receptor B2)G-protein-coupled receptorangiotensin IIbradykininpreeclampsiaprotein aggregation

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Area of Science:

  • Obstetrics and Gynecology
  • Cardiovascular Research
  • Molecular Medicine

Background:

  • Preeclampsia is a frequent and severe pregnancy complication characterized by hypertension and kidney dysfunction after 20 weeks gestation.
  • Current management relies on delivery, as no causative treatment exists to prolong pregnancy.
  • Pathomechanisms remain incompletely understood, though risk factors include impaired placentation and vasculogenesis.

Purpose of the Study:

  • To review the impact of pathological G-protein-coupled receptor (GPCR) protein aggregation on preeclampsia symptoms.
  • To explore novel therapeutic targets based on inhibiting abnormal GPCR complex formation.

Main Methods:

  • Literature review focusing on the role of GPCRs in preeclampsia.
  • Analysis of aberrant heteromerization between angiotensin II AT1 receptor and bradykinin B2 receptor.
  • Summary of experimental treatment strategies targeting GPCR protein aggregation.

Main Results:

  • Excessive protein complex formation between GPCRs is a common sign of preeclampsia.
  • Aberrant heteromerization of angiotensin II AT1 and bradykinin B2 receptors is a causative factor.
  • Inhibition of abnormal GPCR protein complex formation is an emerging experimental treatment approach.

Conclusions:

  • Pathological GPCR protein aggregation significantly contributes to preeclampsia symptoms.
  • Targeting aberrant GPCR heteromerization presents a promising avenue for future preeclampsia therapies.
  • Further research into GPCR modulation could lead to treatments that prolong pregnancies complicated by preeclampsia.