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Overview of Secretory Vesicles01:33

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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.
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Exocytosis is used to release material from cells. Like other bulk transport mechanisms, exocytosis requires energy.
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Proteins and neurotransmitters in secretory vesicles can be released from a cell upon vesicle docking, priming, and fusion with the plasma membrane. Vesicles are docked and primed in preparation for the quick exocytosis of their contents in response to a stimulus. The fusion process is mainly carried out by a SNAP Receptor or SNARE complex, consisting of synaptobrevin, syntaxin-1, and SNAP-25.
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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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The ER, Golgi apparatus, endosomes, and lysosomes work in tandem to modify, sort, and package proteins and lipids. An integrated membrane trafficking network facilitates the back and forth shuttling of molecules within different organelles in the same cell or across the cell membrane.
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Eukaryotic cells have a special pathway that enables communication between various intracellular membrane-bound compartments and also with the extracellular environment. This pathway is termed as the secretory pathway.
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Post-Secretion Processes and Modification of Extracellular Vesicles.

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Summary
This summary is machine-generated.

Extracellular vesicles (EVs) undergo post-secretory modifications (PSMPs) due to interactions within the extracellular space (ECS). These changes impact intercellular communication and disease progression, differing in normal versus pathological conditions.

Keywords:
biomolecular coronaextracellular matrixextracellular vesiclespost-secretory modifications

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Area of Science:

  • Cell Biology
  • Biochemistry
  • Pathology

Background:

  • Extracellular vesicles (EVs) are key mediators of intercellular communication.
  • The extracellular space (ECS) is a dynamic environment influencing cellular processes.
  • Pathological conditions alter the ECS, affecting cellular interactions.

Purpose of the Study:

  • To review post-secretory modification and processes (PSMPs) of EVs.
  • To explore how PSMPs alter EVs after secretion.
  • To understand the role of PSMPs in intercellular communication and disease.

Main Methods:

  • Literature review focusing on EVs and ECS interactions.
  • Analysis of changes in EVs within the extracellular environment.
  • Examination of PSMPs in both normal and pathological contexts.

Main Results:

  • EVs interact with the ECS, leading to structural and functional alterations.
  • These alterations, termed PSMPs, affect EV function.
  • PSMPs can influence the cellular microenvironment and disease spread.

Conclusions:

  • PSMPs are a critical stage in intercellular communication regulation.
  • EV-ECS interactions result in significant EV modifications.
  • Understanding PSMPs is crucial for differentiating normal and pathological intercellular signaling.