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Biogenesis of extracellular vesicles (EV): exosomes, microvesicles, retrovirus-like vesicles, and apoptotic bodies

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Abstract

Recent studies suggest both normal and cancerous cells secrete vesicles into the extracellular space. These extracellular vesicles (EVs) contain materials that mirror the genetic and proteomic content of the secreting cell. The identification of cancer-specific material in EVs isolated from the biofluids (e.g., serum, cerebrospinal fluid, urine) of cancer patients suggests EVs as an attractive platform for biomarker development. It is important to recognize that the EVs derived from clinical samples are likely highly heterogeneous in make-up and arose from diverse sets of biologic processes. This article aims to review the biologic processes that give rise to various types of EVs, including exosomes, microvesicles, retrovirus like particles, and apoptotic bodies. Clinical pertinence of these EVs to neuro-oncology will also be discussed.

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Abbreviations

Exosomes:

30–100 nm secreted vesicles that originate from the endosomal network

Microvesicles:

50–2,000 nm vesicles that arise through direct outward budding and fission of the plasma membrane

Retrovirus-like particles:

90–100 nm non-infectious vesicles that resemble retroviral vesicles and contain a subset of retroviral proteins

Apoptotic bodies:

50–5,000 nm vesicles produced from cell undergoing cell death by apoptosis

EV:

Extracellular vesicle

RLP:

Retrovirus like particle

ILV:

Intraluminal vesicle

MVB:

Multivesicular body

TEM:

Tetraspanin enriched microdomain

ESCRT:

Endosomal sorting complex required for transport

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Correspondence to Clark C. Chen.

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Bob S. Carter and Clark C. Chen contributed equally as senior authors.

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Akers, J.C., Gonda, D., Kim, R. et al. Biogenesis of extracellular vesicles (EV): exosomes, microvesicles, retrovirus-like vesicles, and apoptotic bodies. J Neurooncol 113, 1–11 (2013). https://doi.org/10.1007/s11060-013-1084-8

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