INVESTIGADORES
ASURMENDI Sebastian
artículos
Título:
Artificial microRNAs as antiviral strategy to FMDV: structural implications of target selection.
Autor/es:
GISMONDI MI; XOANA P. ORTIZ; ANABELLA P. CURRÁ; SEBASTIÁN ASURMENDI; OSCAR ALBERTO TABOGA
Revista:
JOURNAL OF VIROLOGICAL METHODS
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2014 vol. 199 p. 1 - 10
ISSN:
0166-0934
Resumen:
RNA interference (RNAi) appears as a promising strategy to control virus replication. While the antiviralpower of short-hairpin RNAs or small-interfering RNAs against FMDV has been demonstrated widely,safer RNAi effectors such as artificial microRNAs (amiRs) have not been evaluated extensively. In thiswork, transgenic monoclonal cell lines constitutively expressing different amiRs targeting FMDV 3Dcoding region or 3UTR were established. Certain cell lines showed an effective, sequence-specificamiR-mediated silencing activity that was accomplished by degradation of the target mRNA, as demonstrated in co-transfection experiments of reporter genes fused to FMDV target sequences. However,FMDV replication in these amiR-expressing cells was affected barely. Experiments aimed at elucidatingthe cause of RNAi failure demonstrated limited accessibility of the targeted region in the molecular environment of the viral RNA. Since RNAi is mediated by large-dimension silencing complexes containing thesiRNA and not simply by a linear oligonucleotide, we propose that target selection should consider notonly the local RNA structure but also the global conformation of target RNA.