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Related Concept Videos

Aquaporins01:25

Aquaporins

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Aquaporins or AQPs are a family of integral membrane proteins whose primary function is to transport water, while some called aquaglyceroporins also transport glycerol. In addition, aquaporins have also been suspected to be involved in transporting volatile substances, such as carbon dioxide and ammonia, across membranes. Such AQPs that act as gas channels are often highly expressed in cells involved in the gaseous exchange, such as red blood cells, epithelial cells, and pulmonary capillaries.
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Fetal Circulation01:14

Fetal Circulation

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Fetal circulation is a unique system that facilitates the exchange of gases, nutrients, and waste products between the developing fetus and the mother. This intricate process takes place through a special organ called the placenta.
Two umbilical arteries transport blood from the fetus to the placenta. At the placenta, the blood absorbs oxygen and nutrients while simultaneously eliminating waste products. This oxygen-enriched and nutrient-rich blood then returns to the fetus through one...
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Physiological Barriers01:25

Physiological Barriers

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Physiological barriers are semi-permeable cellular structures restricting drug diffusion into intracellular compartments and tissues. There are six types of physiological barriers: blood endothelial, cell membrane, blood-brain, blood-cerebrospinal fluid (CSF), blood-placenta, and blood-testis barriers.
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Transcytosis of IgG01:15

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Transcytosis is the process in which molecules are internalized by endocytosis, transported across the cell, and released through exocytosis from the opposite end of the cell. Molecules such as insulin, immunoglobulins, and certain nutrients are transferred through the recycling endosomes by recycling and transcytosis.
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Membrane Proteins01:30

Membrane Proteins

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Plasma membranes have integral transmembrane proteins involved in facilitated transport. These proteins are collectively referred to as transport proteins, and they function as either channels for the material or as carriers themselves. Channel proteins have hydrophilic domains exposed to the intracellular and extracellular fluids and a hydrophilic channel through their core that provides a hydrated opening for solutes to pass through the membrane layers. Passage through the channel allows...
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Factors Affecting Drug Distribution: Physiological Barriers01:23

Factors Affecting Drug Distribution: Physiological Barriers

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Drug distribution in the body is intricately regulated by various physiological barriers that control the passage of substances. These include the capillary endothelial barrier, the blood-brain, blood-cerebrospinal fluid, blood-placental, and blood-testis barriers.
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Determination of the Transport Rate of Xenobiotics and Nanomaterials Across the Placenta using the ex vivo Human Placental Perfusion Model
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Aquaporins and placenta.

Antonio Pérez-Pérez1, Teresa Vilariño-García1, Valeria Dietrich2

  • 1Department of Clinical Biochemistry, Virgen Macarena University Hospital, Medical School, University of Seville, Seville, Spain.

Vitamins and Hormones
|February 17, 2020
PubMed
Summary
This summary is machine-generated.

Maternal-fetal fluid balance is crucial for pregnancy. This review explores aquaporins (AQPs) roles in placental water and glycerol transport, highlighting their importance in fetal development and pregnancy complications.

Keywords:
AQP9AquaporinLeptinPlacentaTrophoblast

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Area of Science:

  • Physiology
  • Molecular Biology
  • Obstetrics

Background:

  • Water is essential for fetal development, comprising 70-90% of the fetal body.
  • Disrupted maternal-fetal fluid exchange can lead to pregnancy complications like fetal growth restriction and premature birth.
  • Aquaporins (AQPs) are membrane proteins facilitating water and small molecule transport, crucial for maintaining fluid balance.

Purpose of the Study:

  • To review the role of aquaporins (AQPs) in placental function and maternal-fetal fluid balance.
  • To investigate the specific roles of AQP3 and AQP9 in placental metabolism and glycerol transport.
  • To discuss the pathophysiological implications of AQPs as glycerol channels in the placenta and their regulation by hormones like leptin.

Main Methods:

  • Literature review focusing on aquaporins in placental physiology and pathophysiology.
  • Analysis of studies investigating AQP3 and AQP9 function in placental cells.
  • Examination of signal transduction pathways and hormonal regulation of placental AQPs.

Main Results:

  • Aquaporins play critical roles in placental water transport and overall fluid homeostasis.
  • AQP3 and AQP9 are implicated in placental metabolism, particularly glycerol transport.
  • Dysregulation of AQPs as glycerol channels may contribute to placental dysfunction and adverse pregnancy outcomes.

Conclusions:

  • Aquaporins are vital for maintaining maternal-fetal fluid balance and placental function.
  • Understanding AQP3 and AQP9 roles in glycerol transport is key to addressing placental pathologies.
  • Hormonal regulation of AQPs offers potential therapeutic targets for managing pregnancy complications.