Search results for "RNA silencing"

showing 3 items of 33 documents

Myotonic dystrophy associated expanded CUG repeat muscleblind positive ribonuclear foci are not toxic to Drosophila

2005

Myotonic dystrophy type 1 is an autosomal dominant disorder associated with the expansion of a CTG repeat in the 3 0 untranslated region (UTR) of the DMPK gene. Recent data suggest that pathogenesis is predominantly mediated by a gain of function of the mutant transcript. In patients, these expanded CUG repeat-containing transcripts are sequestered into ribonuclear foci that also contain the muscleblind-like proteins. To provide further insights into muscleblind function and the pathogenesis of myotonic dystrophy, we generated Drosophila incorporating CTG repeats in the 3 0 -UTR of a reporter gene. As in patients, expanded CUG repeats form discrete ribonuclear foci in Drosophila muscle cell…

Untranslated regioncongenital hereditary and neonatal diseases and abnormalitiesRNA StabilityProtein Serine-Threonine KinasesBiologyMyotonic dystrophyMyotonin-Protein KinaseGeneticsmedicineAnimalsHumansMyotonic Dystrophy3' Untranslated RegionsMolecular BiologyGeneGenetics (clinical)GeneticsRNAGeneral MedicineNuclear matrixbiology.organism_classificationmedicine.diseaseCell biologyRNA silencingDrosophila melanogasterRNA splicingDrosophila melanogasterTrinucleotide Repeat ExpansionHuman Molecular Genetics
researchProduct

Mechanism of the Antiretroviral Effect of dsRNA

1994

The development of AIDS seems to be linked to an impairment of processes which are induced or activated by double-stranded RNA (dsRNA), such as the biosynthesis of interferon (IFN), production of 2′,5′-oligoadenylate (2-5A), ribonuclease L (RNase L) activity and different cell-mediated immune functions. A restriction of available bioactive dsRNA (or of dsRNA-dependent enzymes) may play an important role in the disease progression. The results summarized in this review show that defects in dsRNA-dependent pathways exhibited by AIDS patients can be reversed, at least in part, by exogenously supplied dsRNA.

chemistry.chemical_classificationbiologyRNase PvirusesfungiRNAVirologychemistry.chemical_compoundRNA silencingImmune systemEnzymeBiosynthesischemistryInterferonmedicinebiology.proteinRibonuclease Lmedicine.drug
researchProduct

Characterization of the autoantigen La (SS-B) as a dsRNA unwinding enzyme

1997

During the analysis of the La (SS-B) autoantigen for catalytic activities an ATP-dependent double-stranded RNA unwinding activity was detected. Both native and recombinant La proteins from different species displayed this activity, which could be inhibited by monospecific anti-La antibodies. La protein was able to melt dsRNA substrates with either two 3'-overhangs or a single 3'- and a 5'-overhang. Double-stranded RNAs with two 5'-overhangs were not unwound, indicating that at least one 3'-overhang is required for unwinding. Sequence elements of the La protein that might be involved in dsRNA unwinding, such as an evolutionarily conserved putative ATP-binding motif and an element that is hom…

virusesgenetic processesGene ExpressionRNA-binding proteinBiologyAutoantigensAntibodiesSubstrate SpecificitySingle-stranded binding proteinlaw.inventionMiceAdenosine TriphosphatelawGene expressionEscherichia coliGeneticsAnimalsHumansGeneralLiterature_REFERENCE(e.g.dictionariesencyclopediasglossaries)Cells CulturedRNA Double-StrandedRibonucleoproteinRNARNA NucleotidyltransferasesProtein kinase RMolecular biologyRecombinant ProteinsRatsenzymes and coenzymes (carbohydrates)RNA silencingLiverRibonucleoproteinsbiology.proteinRecombinant DNAElectrophoresis Polyacrylamide GelRNA HelicasesResearch Article
researchProduct