Pathogenesis of bacterial infections and immunity

@article{dedaMarques2022,

title = {Invading viral DNA triggers dsRNA synthesis by RNA polymerase II to activate antiviral RNA interference in Drosophila},

author = {Isaque J.S. de Faria and Eric R.G.R. Aguiar and Roenick P. Olmo and Juliana Alves da Silva and Laurent Daeffler and Richard W. Carthew and Jean-Luc Imler and Joao T. Marques},

doi = {10.1016/j.celrep.2022.110976},

year  = {2022},

date = {2022-06-21},

urldate = {2022-06-21},

journal = {Cell Reports},

volume = {39},

pages = {110976},

abstract = {dsRNA sensing triggers antiviral responses against RNA and DNA viruses in diverse eukaryotes. In Drosophila, Invertebrate iridescent virus 6 (IIV-6), a large DNA virus, triggers production of small interfering RNAs (siRNAs) by the dsRNA sensor Dicer-2. Here, we show that host RNA polymerase II (RNAPII) bidirec- tionally transcribes specific AT-rich regions of the IIV-6 DNA genome to generate dsRNA. Both replicative and naked IIV-6 genomes trigger production of dsRNA in Drosophila cells, implying direct sensing of invading DNA. Loquacious-PD, a Dicer-2 co-factor essential for the biogenesis of endogenous siRNAs, is dispensable for processing of IIV-6-derived dsRNAs, which suggests that they are distinct. Consistent with this finding, inhibition of the RNAPII co-factor P-TEFb affects the synthesis of endogenous, but not virus-derived, dsRNA. Altogether, our results suggest that a non-canonical RNAPII complex recognizes invading viral DNA to synthesize virus-derived dsRNA, which activates the antiviral siRNA pathway in Drosophila.},

keywords = {antiviral, Drosophila, dsRNA, imler, M3i, Marques, protocol, RNA Interference},

pubstate = {published},

tppubtype = {article}

}

@article{M2013,

title = {Silencing of Genes and Alleles by RNAi in Anopheles gambiae},

author = {Marina Lamacchia and John Randy Clayton and R Wang-Sattler and Lars M Steinmetz and Elena A Levashina and Stéphanie A Blandin},

year  = {2013},

date = {2013-06-13},

journal = {Methods Mol Biol.},

volume = {923},

pages = {161-76},

abstract = {Anopheles gambiae mosquitoes are the major vectors of human malaria parasites. However, mosquitoes are not passive hosts for parasites, actively limiting their development in vivo. Our current understanding of the mosquito antiparasitic response is mostly based on the phenotypic analysis of gene knockdowns obtained by RNA interference (RNAi), through the injection or transfection of long dsRNAs in adult mosquitoes or cultured cells, respectively. Recently, RNAi has been extended to silence specifically one allele of a given gene in a heterozygous context, thus allowing to compare the contribution of different alleles to a phenotype in the same genetic background.},

keywords = {blandin, dsRNA, M3i, RNAi},

pubstate = {published},

tppubtype = {article}

}