GEO DataSets

(Submitter supplied) Dicer and Argonaute2 (Ago2) gene is involving in microRNA (miRNA) maturation. Knockdown of these genes has great impact on miRNA expression profiles. We used microarrays to detail the miRNA expression profiles in Dicer- and Ago2-knockdown HeLa cells and demonstarted that the significant difference between Ago2-knockdown and Dicer- and Ago2-co-knockdown HeLa cells were not found.

Organism:

synthetic construct; Homo sapiens

Type:

Non-coding RNA profiling by array

Platform:

GPL19117

5 Samples

Download data: CEL

(Submitter supplied) We identified the abundance of isoforms of miRNAs encoded by human adenovirus 5 in total cytoplasmic RNA fractions of infected cells as well as in fractions containing the purified RNA-induced silencing complex (RISC).

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL11154

8 Samples

Download data: TXT

(Submitter supplied) Human adenovirus 5 encodes a small set of miRNAs, which are generated by DICER-mediated processing of 2 larger precursors, the so-called virus-associated RNAs I and II. To identify targets of one of the major miRNA isoforms derived from virus-associated RNAI (mivaRNAI-137), we isolated Argonaute complexes of mivaRNAI-137-transfected cells and analyzed co-purifying RNAs by microarray analysis. RNAs enriched in Argonaute complexes of mivaRNAI-137-transfected cells compared to cells transfected with a control siRNA were identified and subjected to further validation. more...

Organism:

Homo sapiens

Type:

Expression profiling by array

Platforms:

GPL11532 GPL6244

28 Samples

Download data: CEL

(Submitter supplied) In infection with an adenovirus, it remains to be clarified whether host miRNAs affect Ad replication. We focused on miR-27 as an miRNA crucial for regulation of Ad infection because miR-27 has been reported to be involved in infection of other viruses, including MCMV and herpesvirus saimiri (HVS). We used microarrays to detail gene expression profiles in miR-27a/b-overexpressing HeLa cells and demonstarted that expression levels of various genes were down- or up-regulated following transfection with miR-27a/b mimics.

Organism:

Homo sapiens

Type:

Expression profiling by array

Platform:

GPL16699

3 Samples

Download data: TXT

(Submitter supplied) While the issue of whether RNA interference (RNAi) ever forms part of the antiviral innate immune response in mammalian somatic cells remains controversial, there is considerable evidence demonstrating that few, if any, viral small interfering RNAs (siRNAs) are produced in infected cells. Moreover, total inhibition of RNAi by mutational inactivation of key RNAi factors, such as Dicer or Argonaut 2, has been shown to not enhance virus replication. more...

Organism:

Homo sapiens; Influenza A virus (A/hvPR8/34(H1N1))

Type:

Other; Non-coding RNA profiling by high throughput sequencing

Platforms:

GPL24703 GPL11154

13 Samples

Download data: BED

(Submitter supplied) Effect of MCPIP1 knockdown on miRNA expression profile.

Organism:

Murid gammaherpesvirus 4; human gammaherpesvirus 4; Betapolyomavirus macacae; Mus musculus; Rattus norvegicus; Murid betaherpesvirus 1; JC polyomavirus; Human immunodeficiency virus 1; Human gammaherpesvirus 8; Homo sapiens; Human alphaherpesvirus 1; Human betaherpesvirus 5; Betapolyomavirus hominis

Type:

Non-coding RNA profiling by array

Platform:

GPL7723

2 Samples

Download data: TXT

(Submitter supplied) In mammals, early resistance to viruses relies on interferons, which protect differentiated but not stem cells from viral replication. Many other organisms rely instead on RNA interference (RNAi) mediated by a specialised Dicer protein that cleaves viral double stranded RNA. Whether RNAi also contributes to mammalian antiviral immunity remains controversial. Here we identify an isoform of Dicer, named antiviral Dicer (aviD), that protects tissue stem cells from RNA viruses, including Zika virus and SARS-CoV-2, by dicing viral double-stranded RNA to orchestrate antiviral RNAi. more...

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing

Platform:

GPL21103

6 Samples

Download data: TXT

(Submitter supplied) Plants and invertebrates protect themselves from viruses through RNA interference (RNAi), yet it remains unknown whether this defense mechanism exists in mammals. Antiviral RNAi involves the processing of viral long double-stranded (ds) RNA molecules into small interfering RNAs (siRNAs) by the ribonuclease (RNAse) III Dicer. These siRNAs are incorporated into effector complex(es) containing members of the Argonaute (Ago) protein family and guide silencing of complementary target viral RNAs. more...

Organism:

Mus musculus

Type:

Other; Non-coding RNA profiling by high throughput sequencing

Platform:

GPL13112

9 Samples

Download data: TXT

(Submitter supplied) While RNA interference (RNAi) functions as a potent antiviral innate immune response in plants and invertebrates, mammalian somatic cells appear incapable of mounting an RNAi response and few small interfering RNAs (siRNAs) can be detected. To examine why siRNA production is inefficient, we have generated double knockout human cells lacking both Dicer and PKR. Using these cells, which tolerate dsRNA expression, we show that mutant forms of human Dicer lacking the amino-terminal helicase domain can process dsRNAs to produce high levels of siRNAs that are readily detectable by Northern blot and that can effectively and specifically inhibit the expression of cognate mRNAs. more...

Organism:

Homo sapiens; Human poliovirus 1 strain Sabin

Type:

Non-coding RNA profiling by high throughput sequencing; Other

Platforms:

GPL20271 GPL11154

21 Samples

Download data: BED, FA

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platforms:

GPL11154 GPL15520

8 Samples

Download data: TXT

(Submitter supplied) The Lupus autoantigen (La) is a single-stranded RNA-binding protein that stabilizes RNA polymerase III (pol III) transcripts and supports RNA folding. In addition, La has been implicated in different steps of the mammalian small RNA pathway. Here, we have analyzed effects of La depletion on the Argonaute (Ago)-bound small RNAs in human cells. We find that in the absence of La, distinct tRNA fragments are loaded into Ago protein complexes and our data suggests that La prevents the production and loading of such tRNA fragments. more...

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL11154

4 Samples

Download data: TXT

(Submitter supplied) The Lupus autoantigen (La) is a single-stranded RNA-binding protein that stabilizes RNA polymerase III (pol III) transcripts and supports RNA folding. In addition, La has been implicated in different steps of the mammalian small RNA pathway. Here, we have analyzed effects of La depletion on the Argonaute (Ago)-bound small RNAs in human cells. We find that in the absence of La, distinct tRNA fragments are loaded into Ago protein complexes and our data suggests that La prevents the production and loading of such tRNA fragments. more...

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL15520

4 Samples

Download data: TXT

(Submitter supplied) A hallmark of RNA silencing is a class of ~22 nt RNAs which are processed from dsRNA precursor by Dicer. Accurate processing by Dicer is critical for the functionality of microRNAs (miRNAs). According to the current model, Dicer measures the length by anchoring the 3' overhang of the dsRNA terminus. Here we find that human Dicer binds to the 5' end of RNA and utilizes the 5' end as an additional reference point for cleavage site selection (5' counting rule). more...

Organism:

Mus musculus

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL9250

5 Samples

Download data

(Submitter supplied) This SuperSeries is composed of the SubSeries listed below.

Organism:

Homo sapiens; Mus musculus

Type:

Expression profiling by high throughput sequencing; Non-coding RNA profiling by high throughput sequencing

Platforms:

GPL9115 GPL9250

8 Samples

Download data: BED, SAM, TXT, WIG

(Submitter supplied) Small RNA expression was analysed in total RNA of HeLa cells treated with siRNA toward Luciferase (negative cotrol) or ADAR1.

Organism:

Homo sapiens

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL9115

2 Samples

Download data: TXT

(Submitter supplied) Adar1 is an essential gene for mouse embryonic development. Adar1 null mouse embryos dies around E11.5 because of massive apoptosis.

Organism:

Mus musculus

Type:

Expression profiling by high throughput sequencing; Non-coding RNA profiling by high throughput sequencing

Platform:

GPL9250

6 Samples

Download data: BED, SAM, TXT, WIG

(Submitter supplied) Mammals have one Dicer gene required for biogenesis of small RNAs in microRNA (miRNA) and RNA interference (RNAi) pathways. Yet, endogenous RNAi is highly active in oocytes but not in somatic cells. Here, we provide a mechanistical explanation for high RNAi activity in mouse oocytes. The main Dicer isoform in oocytes is transcribed from an intronic MT-C retrotransposon, which functions as a promoter of an oocyte-specific Dicer isoform (denoted DicerO). more...

Organism:

Mus musculus

Type:

Non-coding RNA profiling by high throughput sequencing

Platform:

GPL14602

19 Samples

Download data: BED

(Submitter supplied) In mammalian somatic cells, the relative contribution of RNAi and the type I interferon response during viral infection is unclear. The apparent inefficiency of antiviral RNAi might be due to self-limiting properties and mitigating co-factors of the key enzyme Dicer. In particular, the helicase domain of human Dicer appears to be an important restriction factor of its activity. Here, we study the involvement of several helicase-truncated mutants of human Dicer in the antiviral response. more...

Organism:

Homo sapiens; Sindbis virus

Type:

Expression profiling by high throughput sequencing; Other

Platforms:

GPL33716 GPL20301

26 Samples

Download data: BW, TXT

(Submitter supplied) In mammalian somatic cells, the relative contribution of RNAi and the type I interferon response during viral infection is unclear. The apparent inefficiency of antiviral RNAi might be due to self-limiting properties and mitigating co-factors of the key enzyme Dicer. In particular, the helicase domain of human Dicer appears to be an important restriction factor of its activity. Here, we study the involvement of several helicase-truncated mutants of human Dicer in the antiviral response. more...

Organism:

Homo sapiens; Sindbis virus

Type:

Other

Platform:

GPL33716

8 Samples

Download data: BW, TXT

(Submitter supplied) In mammalian somatic cells, the relative contribution of RNAi and the type I interferon response during viral infection is unclear. The apparent inefficiency of antiviral RNAi might be due to self-limiting properties and mitigating co-factors of the key enzyme Dicer. In particular, the helicase domain of human Dicer appears to be an important restriction factor of its activity. Here, we study the involvement of several helicase-truncated mutants of human Dicer in the antiviral response. more...

Organism:

Sindbis virus; Homo sapiens

Type:

Expression profiling by high throughput sequencing

Platforms:

GPL33716 GPL20301

18 Samples

Download data: TXT