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Exosomes: mediators of communication in eukaryotes Biol. Res.
Lopez-Verrilli,María A; Court,Felipe A.
In addition to the established mechanisms of intercellular signaling, a new way of communication has gained much attention in the last decade: communication mediated by exosomes. Exosomes are nanovesicles (with a diameter of 40-120 nm) secreted into the extracellular space by the multivesicular endosome after its outer membrane fuses with the plasma membrane. Once released, exosomes modulate the response of the recipient cells that recognize them. This indicates that exosomes operate in a specific manner and participate in the regulation of the target cell. Remarkably, exosomes occur from unicellular organisms to mammals, suggesting an evolutionarily conserved mechanism of communication. In this review we describe the cascade of exosome formation,...
Tipo: Journal article Palavras-chave: Exosome; Nanovesicle; Intercellular communication.
Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602013000100001
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Slow axoplasmic transport under scrutiny Biol. Res.
Court,Felipe A; Álvarez,Jaime.
The origin of axoplasmic proteins is central for the biology of axons. For over fifty years axons have been considered unable to synthesize proteins and that cell bodies supply them with proteins by a slow transport mechanism. To allow for prolonged transport times, proteins were assumed to be stable, i.e., not degraded in axons. These are now textbook notions that configure the slow transport model (STM). The aim of this article is to cast doubts on the validity of STM, as a step toward gaining more understanding about the supply of axoplasmic proteins. First, the stability of axonal proteins claimed by STM has been disproved by experimental evidence. Moreover, the evidence for protein synthesis in axons indicates that the repertoire is extensive and the...
Tipo: Journal article Palavras-chave: Protein synthesis; Radioactive wave; Maintenance of axons; Schwann cell; Glia; Transgenic mouse.
Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602011000400001
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