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Intralumenal Vesicles and Multivesicular Bodies01:38

Intralumenal Vesicles and Multivesicular Bodies

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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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Exosomes are stable, lipid bilayer-enclosed vesicles capable of crossing biological barriers. They can carry a wide range of molecules required for intercellular communication. Once exosomes are released from the cell where they originated, they enter a recipient cell through various pathways such as fusion, receptor-mediated endocytosis, macropinocytosis, and phagocytosis.
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After budding out from the ER membrane, some COPII vesicles lose their coat and fuse with one another to form larger vesicles and interconnected tubules called vesicular tubular clusters or VTCs. These clusters constitute a compartment at the ER-Golgi interface known as ERGIC (Endoplasmic Reticulum Golgi Intermediate Compartment). The ERGIC is a mobile membrane-bound cargo transport system that sorts proteins secreted from ER and delivers them to the Golgi.
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Vesicular transport is a cellular process that encompasses the engulfment of particles or dissolved substances by cells. It involves endocytosis, transcytosis, and exocytosis.
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Updated: Jul 20, 2025

Extraction of Extracellular Vesicles from Whole Tissue
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Extracellular vesicle-embedded materials.

Yingchang Ma1, Steve Brocchini1, Gareth R Williams1

  • 1UCL School of Pharmacy, University College London, 29 - 39 Brunswick Square, London WC1N 1AX, UK.

Journal of Controlled Release : Official Journal of the Controlled Release Society
|August 3, 2023
PubMed
Summary
This summary is machine-generated.

Extracellular vesicles (EVs) show therapeutic promise. Material design of delivery systems enhances EV stability, targeting, and clinical translation for regenerative medicine and disease diagnosis.

Keywords:
biomaterialextracellular vesicleformulationscaffoldstability

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Characterizing Extracellular Vesicles from Biological Fluids
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Area of Science:

  • Biomaterials Science
  • Nanotechnology
  • Regenerative Medicine

Background:

  • Extracellular vesicles (EVs) are cell-derived vesicles with therapeutic potential due to low immunogenicity and targeting ability.
  • EVs mimic parental cell functions, offering applications in regenerative medicine and disease diagnostics.
  • Current limitations include rapid clearance and suboptimal tissue localization, necessitating advanced delivery systems.

Purpose of the Study:

  • To review material design strategies for extracellular vesicle (EV) delivery systems.
  • To highlight how material properties influence EV stability, function, and biodistribution.
  • To discuss formulation approaches for advancing EV-based therapies from research to clinical application.

Main Methods:

  • Examination of genetic and chemical modification strategies for enhancing EV targeting and persistence.
  • Analysis of hydrogel and nano-formulation approaches for controlled EV localization.
  • Review of biomaterial and bioscaffold applications for sustained EV delivery and release.

Main Results:

  • Material properties significantly impact molecular interactions, EV stability, and functional maintenance.
  • Specific material designs can regulate EV release rates and biodistribution for targeted therapy.
  • Modification methods are crucial for improving EV targeting efficiency and therapeutic outcomes.

Conclusions:

  • Advanced material design is key to overcoming challenges in EV delivery systems.
  • Formulation strategies are essential for optimizing EV stability, targeting, and therapeutic efficacy.
  • Effective EV delivery systems are critical for translating EV-based research into clinical practice.