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Intralumenal Vesicles and Multivesicular Bodies

Intraluminal vesicles (ILVs) are small vesicles 50-80 nm in diameter formed during the maturation of early endosomes. A specialized endosome containing numerous ILVs is called a multivesicular body (MVB). ILVs contain internalized molecules such as antigens, nucleic acids, proteins, and metabolites. Some of these molecules are released from the MVBs inside exosomes and are transported to other cells. Other MVBs contain molecules that are retained in the ILVs and are later degraded within the...
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Spontaneous Formation and Rearrangement of Artificial Lipid Nanotube Networks as a Bottom-Up Model for Endoplasmic Reticulum
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Spontaneously formed unilamellar vesicles.

Mu-Ping Nieh1, Norbert Kucerka, John Katsaras

  • 1Canadian Neutron Beam Centre, Steacie Institute for Molecular Sciences, Chalk River Laboratories, National Research Council Canada, Chalk River, Ontario, Canada.

Methods in Enzymology
|November 17, 2009
PubMed
Summary
This summary is machine-generated.

Mixtures of phospholipids spontaneously form small, uniform unilamellar vesicles (ULVs) less than 50 nm. These stable ULVs show promise as carriers for imaging and therapeutics.

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Published on: January 19, 2020

Area of Science:

  • Biophysics
  • Materials Science
  • Nanotechnology

Background:

  • Phospholipids are key components of biological membranes.
  • Self-assembly of phospholipids into vesicles is a fundamental process.
  • Uniform unilamellar vesicles (ULVs) are desirable for drug delivery and imaging.

Purpose of the Study:

  • To investigate the spontaneous formation of uniform unilamellar vesicles (ULVs) from phospholipid mixtures.
  • To characterize the morphology and stability of these ULVs.
  • To assess the potential of ULVs as carriers for imaging and therapeutic applications.

Main Methods:

  • Utilized mixtures of long- and short-chain phospholipids.
  • Employed small angle neutron scattering (SANS) for morphological characterization.
  • Analyzed vesicle size and polydispersity.

Main Results:

  • Achieved spontaneous formation of uniform ULVs with diameters ≤ 50 nm.
  • Observed low polydispersities (<0.3) for the formed ULVs.
  • Demonstrated high stability of the resulting ULVs.
  • Identified potential for ULVs in imaging and therapeutic delivery.

Conclusions:

  • Phospholipid mixtures provide a reliable method for generating small, uniform ULVs.
  • Small angle neutron scattering is effective for characterizing hydrogenous vesicle morphology.
  • The stable, uniform nature of these ULVs makes them promising candidates for advanced biomedical applications.