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Related Concept Videos

Carrier-Mediated Transport01:06

Carrier-Mediated Transport

Carrier-mediated transport is a pivotal process in drug absorption, particularly for lipid-insoluble drugs, and encompasses facilitated diffusion and active transport. Facilitated diffusion allows drugs to move along their concentration gradient without energy expenditure, while active transport utilizes ATP to drive drug movement against this gradient.
Active transport involves two types of membrane-spanning transporters: uptake and efflux. Uptake transporters are expressed in the small...
Membrane Asymmetry Regulating Transporters01:19

Membrane Asymmetry Regulating Transporters

Enzymes like flippase, floppase, and scramblase transfer phospholipids from one layer to another in the membrane, thereby affecting membrane asymmetry.
Flippase
Eukaryotic flippases are type-IV P-type ATPases or P4-ATPases belonging to P-type ATPase family proteins that are membrane-bound pumps involved in the ATP-mediated transport of ions and molecules across the membrane. Flippases flip specific phospholipids from the outer to the inner leaflet of a membrane. All P4-ATPases have one...
Facilitated Diffusion01:16

Facilitated Diffusion

The plasma membrane, a critical structure in cellular biology, houses an array of transporters, or carrier proteins, interspersed within its lipid bilayer. These proteins play a crucial role in solute transport through facilitated diffusion, a form of passive diffusion that uses transporters to move the molecules across the membrane.
In this process, substrates such as organic compounds and ions interact with a transporter on one side, triggering conformational changes in proteins that enable...
Lipid Absorption01:24

Lipid Absorption

Dietary triglycerides from chyme in the duodenum are mixed with bile salts produced by the liver to emulsify fats. As a result, large droplets are broken down into smaller ones, increasing the surface area for enzymatic action. Once emulsified, pancreatic lipases hydrolyze the triglycerides into free fatty acids and monoglycerides.
These breakdown products bind with bile salts and lecithin to form micelles, which quickly pass between microvilli to come in close contact with the apical...
Facilitated Transport01:19

Facilitated Transport

The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In facilitated transport, also known as facilitated diffusion, molecules and ions travel across a membrane via...
Facilitated Transport01:19

Facilitated Transport

The chemical and physical properties of plasma membranes cause them to be selectively permeable. Since plasma membranes have both hydrophobic and hydrophilic regions, substances need to be able to transverse both regions. The hydrophobic area of membranes repels substances such as charged ions. Therefore, such substances need special membrane proteins to cross a membrane successfully. In  facilitated transport, also known as facilitated diffusion, molecules and ions travel across a membrane via...

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Related Experiment Video

Updated: Jul 15, 2026

Quantification of Endothelial Fatty Acid Uptake using Fluorescent Fatty Acid Analogs
06:03

Quantification of Endothelial Fatty Acid Uptake using Fluorescent Fatty Acid Analogs

Published on: August 15, 2025

Fatty acid transport proteins.

Ruth E Gimeno1

  • 1Department of Cardiovascular and Metabolic Diseases, Wyeth Research, Cambridge, Massachusetts 02140, USA. rgimeno@wyeth.com

Current Opinion in Lipidology
|May 15, 2007
PubMed
Summary

Fatty acid transport proteins (FATPs) are multifunctional, impacting energy balance, insulin sensitivity, and skin health. Research highlights their roles in fatty acid uptake and enzymatic activity, with implications for various metabolic processes.

Area of Science:

  • Biochemistry
  • Molecular Biology
  • Physiology

Background:

  • Fatty acid transport proteins (FATPs) are crucial for cellular fatty acid uptake and activation.
  • Their diverse roles extend to metabolism, homeostasis, and disease pathogenesis.

Purpose of the Study:

  • To review recent advancements in understanding FATP functions.
  • To elucidate the physiological significance of various FATPs.

Main Methods:

  • Review of experimental data from knockout studies and functional analyses.
  • Analysis of FATP roles in different tissues like adipose, muscle, and liver.

Main Results:

  • FATP1 is a key transporter in adipose and muscle tissues, influencing energy homeostasis and insulin resistance.

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Using Caco-2 Cells to Study Lipid Transport by the Intestine
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Using Caco-2 Cells to Study Lipid Transport by the Intestine

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  • FATP5 plays a dual role in hepatic fatty acid uptake and bile acid metabolism.
  • FATP4 is critical for skin homeostasis, potentially via its acyl-CoA synthetase activity.
  • Conclusions:

    • FATP modulation affects energy balance, insulin sensitivity, skin integrity, and bile acid metabolism.
    • Both transport and enzymatic activities of FATPs contribute to observed phenotypes.
    • Further research is needed to clarify the roles of FATP2, FATP3, and FATP6.