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Related Concept Videos

Overview of Secretory Vesicles01:33

Overview of Secretory Vesicles

Secretory vesicles, also known as dense core vesicles (DCVs), are membrane-bound vesicles that transport secretory proteins, such as hormones or neurotransmitters. Regulated secretory vesicles transport proteins from the trans-Golgi network to the exterior of the cell. Proteins present in regulated secretory vesicles are required to be rapidly exocytosed in large amounts upon a specific stimulus.
Various proteins regulate the aggregation of molecules inside the secretory vesicles. Chromogranins...
Intralumenal Vesicles and Multivesicular Bodies01:38

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...
COP Coated Vesicles00:59

COP Coated Vesicles

Membrane-enclosed structures called vesicles transport proteins and lipids across the cell. The vesicles derive their cargo from the plasma membrane, Golgi, ER, or endosome. Coated vesicles are spherical, protein-coated carriers with a 50–100 nm diameter that mediate bidirectional transport between the ER and the Golgi. The distribution of proteins between the ER and Golgi complex is dynamic and is maintained by different coated vesicles. Their formation is driven by the assembly of different...
Vesicular Tubular Clusters01:45

Vesicular Tubular Clusters

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.
With the help of motor proteins such...

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Synthesis of Compound Giant Unilamellar Vesicles: A Biomimetic Model of Nucleate Cells
10:10

Synthesis of Compound Giant Unilamellar Vesicles: A Biomimetic Model of Nucleate Cells

Published on: July 3, 2025

Giant vesicles as cell models.

Susanne F Fenz1, Kheya Sengupta

  • 1Leiden Institute of Physics: Physics of Life Processes, Leiden University, The Netherlands.

Integrative Biology : Quantitative Biosciences From Nano to Macro
|July 26, 2012
PubMed
Summary
This summary is machine-generated.

Giant unilamellar vesicles (GUVs) serve as advanced cell models, enabling quantitative studies of membrane biophysics and cellular processes. These models offer insights into complex cellular functions like membrane domain formation and cell adhesion.

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Area of Science:

  • Cellular Biology
  • Biophysics
  • Membrane Science

Background:

  • Understanding cellular mechanisms is challenged by the complexity and interconnectedness of cellular components.
  • Idealized systems like giant unilamellar vesicles (GUVs) are crucial for dissecting specific cellular functions.
  • GUVs offer a cell-sized compartment to study membrane-associated processes and protein behavior.

Purpose of the Study:

  • To present recent advancements in GUV design and their application as cell models.
  • To demonstrate how GUVs facilitate quantitative testing for insights into real cell workings.
  • To highlight GUV utility in studying membrane biophysics, domain formation, and cell adhesion.

Main Methods:

  • Utilizing giant unilamellar vesicles (GUVs) as simplified, cell-sized model systems.
  • Designing GUV membranes to incorporate specific, oriented membrane proteins.
  • Employing techniques such as micro-interferometry for detailed analysis of cellular interactions.

Main Results:

  • Recent GUV designs enable more precise investigations into cellular phenomena.
  • Studies using GUVs have provided quantitative data on membrane domain formation.
  • GUVs have yielded significant insights into the mechanisms of cell adhesion.

Conclusions:

  • GUVs are powerful tools for quantitative biophysical studies and understanding cellular functions.
  • Further research using GUVs can address remaining questions in cell biology and membrane science.
  • Advancements in GUV technology continue to enhance their utility as cell models.