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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.
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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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In the plasma membrane, the lipids forming the bilayer can also act as an anchor to tether proteins to the membrane. The three main types of lipid anchors found in eukaryotes are – prenyl groups, fatty acyl groups, and glycosylphosphatidylinositol or GPI groups. Prenyl and fatty acyl groups act as anchors on the cytosolic surface of the membrane, whereas GPI anchors proteins on the extracellular side.
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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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Placental fatty acid transfer.

Rohan M Lewis1, Christian Wadsack2, Gernot Desoye3

  • 1Faculty of Medicine, University of Southampton, Southampton General Hospital, England, UK.

Current Opinion in Clinical Nutrition and Metabolic Care
|December 6, 2017
PubMed
Summary

Recent advances reveal placental lipid transport impacts fetal development and childhood obesity risk. Novel transporters like Mfsd2a are key for docosahexaenoic acid (DHA) transfer, crucial for neurodevelopment.

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Area of Science:

  • Reproductive biology
  • Maternal-fetal medicine
  • Nutritional science

Background:

  • Placental lipid metabolism influences fetal nutrient supply.
  • Maternal metabolic status, including obesity, affects placental function.
  • Essential fatty acids are critical for fetal development.

Purpose of the Study:

  • To review advances in placental lipid transport.
  • To examine the link between maternal metabolic status and placental lipid transfer.
  • To understand the role of placental lipid transfer in fetal neurodevelopment and childhood obesity.

Main Methods:

  • Literature review of recent research on placental lipid transport.
  • Analysis of studies on maternal obesity and placental lipid metabolism.
  • Investigation of novel fatty acid transporters and their function.

Main Results:

  • Placental lipid metabolism significantly impacts fatty acid delivery to the fetus.
  • Maternal obesity alters placental lipid metabolism, affecting fetal development.
  • Nontraditional transporters, such as Mfsd2a, play a crucial role in docosahexaenoic acid (DHA) transfer.

Conclusions:

  • Placental lipid metabolism is a key determinant of fetal fatty acid supply.
  • Maternal conditions like obesity can disrupt placental lipid transfer and fetal outcomes.
  • Further research is needed to clarify how placental lipid metabolism regulation influences long-term child health.