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Evaluation of the Storage Stability of Extracellular Vesicles
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Extracellular Vesicles and Cellular Homeostasis.

Jordan Matthew Ngo1, Justin Krish Williams1, Congyan Zhang1

  • 1Department of Molecular and Cell Biology, University of California, Berkeley, California, USA;

Annual Review of Biochemistry
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PubMed
Summary
This summary is machine-generated.

Extracellular vesicles (EVs) are secreted particles involved in cell communication. Evidence suggests EVs primarily function to remove toxic cargo for homeostasis, rather than widespread intercellular signaling.

Keywords:
exosomesextracellular vesicleshomeostasisintercellular communicationmicrovesiclesunconventional secretion

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Area of Science:

  • Cell biology
  • Biochemistry
  • Physiology

Background:

  • Extracellular vesicles (EVs) are membrane-enclosed particles secreted by cells.
  • EVs are often proposed to function like viruses, delivering cargo to target cells for intercellular communication.
  • An alternative model suggests EVs remove cellular waste to maintain homeostasis.

Purpose of the Study:

  • To present evidence supporting the homeostatic model of EV function.
  • To discuss the general inefficiency of EV cargo delivery for intercellular communication.
  • To re-evaluate the proposed role of EVs in widespread intercellular signaling.

Main Methods:

  • Review of existing literature on EV function.
  • Analysis of experimental evidence supporting different EV models.
  • Comparative analysis of EV cargo delivery versus homeostatic roles.

Main Results:

  • Significant evidence supports EVs acting as a mechanism for waste removal and homeostasis.
  • The proposed model of EVs as widespread intercellular communicators via cargo transfer faces challenges.
  • The efficiency of EV cargo delivery to recipient cells is generally low.

Conclusions:

  • EVs play a crucial role in maintaining cellular and organismal homeostasis by sequestering and removing toxic cargo.
  • While not mutually exclusive, the homeostatic function of EVs appears more strongly supported by current evidence than a broad role in intercellular communication via cargo transfer.
  • Further research is needed to fully elucidate the diverse functions of EVs.