Selective Export into Extracellular Vesicles and Function of tRNA Fragments during T Cell Activation.
Cell Rep
; 25(12): 3356-3370.e4, 2018 12 18.
Article
en En
| MEDLINE
| ID: mdl-30566862
ABSTRACT
The discovery of microRNA (miRNA) sorting into extracellular vesicles (EVs) revealed a novel mode of intercellular communication and uncovered a link between cellular endomembrane compartments and small RNAs in EV-secreting cells. Using a two-step ultracentrifugation procedure to isolate EVs released by T cells, we found that 45% of tRNA fragments (tRFs), but fewer than 1% of miRNAs, were significantly enriched in EVs compared with the corresponding cellular RNA. T cell activation induced the EV-mediated release of a specific set of tRFs derived from the 5' end and 3'-internal region of tRNAs without variable loops. Inhibition of EV biogenesis pathways specifically led to the accumulation of these activation-induced EV-enriched tRFs within multivesicular bodies (MVBs). Introducing antisense oligonucleotides to inhibit these tRFs enhanced T cell activation. Taken together, these results demonstrate that T cells selectively release tRFs into EVs via MVBs and suggest that this process may remove tRFs that repress immune activation.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
ARN de Transferencia
/
Activación de Linfocitos
/
Linfocitos T
/
Transporte de ARN
/
Vesículas Extracelulares
Límite:
Animals
Idioma:
En
Revista:
Cell Rep
Año:
2018
Tipo del documento:
Article
País de afiliación:
Estados Unidos