SETX attenuates the antiviral innate immune response and controls viral biogenesis (GRO-Seq)
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ABSTRACT:
ORGANISM(S): Homo sapiens
PROVIDER: GSE52935 | GEO | 2015/03/30
SECONDARY ACCESSION(S): PRJNA230478
REPOSITORIES: GEO
Similar Datasets
Project description:The innate immune response is the first line of defense against pathogens, and factors that control this cellular response represent targets for treating both infectious and inflammatory diseases. Here, we reveal a novel role for the human helicase SETX, also previously implicated in amyotrophic lateral sclerosis (ALS4) and ataxia with oculomotor apraxia (AOA2), in controlling the magnitude of the antiviral response. Cells depleted for SETX and AOA2 patient-derived SETX-null cells show increased expression of antiviral mediators in response to infection. Mechanistically, this effect is achieved through SETX-mediated inhibition of RNAPII transcription of antiviral genes, and depends on SETX helicase activity. Our results suggest that SETX helps maintain the delicate balance between controlling viral infection and avoiding the potentially detrimental effects of an excessive antiviral response. More broadly, the observation that SETX can regulate the transcriptional activity of specific genes may have important implications for disorders where SETX function is compromised. A549 cells that were transfected with either control non-targeting or SETX-specific siRNAs were infected with the Influenza A virus (A/PR/8/34(ΔNS1) strain) at a multiplicity of infection (MOI) of 3 for 4 hours. Nuclei were then extracted and used to prepare Global Run-On Sequencing (GRO-seq) libraries.
2015-03-30 | E-GEOD-52935 | biostudies-arrayexpress
Project description:The innate immune response is the first line of defense against pathogens, and factors that control this cellular response represent targets for treating both infectious and inflammatory diseases. Here, we reveal a novel role for the human helicase SETX, also previously implicated in amyotrophic lateral sclerosis (ALS4) and ataxia with oculomotor apraxia (AOA2), in controlling the magnitude of the antiviral response. Cells depleted for SETX and AOA2 patient-derived SETX-null cells show increased expression of antiviral mediators in response to infection. Mechanistically, this effect is achieved through SETX-mediated inhibition of RNAPII transcription of antiviral genes, and depends on SETX helicase activity. Our results suggest that SETX helps maintain the delicate balance between controlling viral infection and avoiding the potentially detrimental effects of an excessive antiviral response. More broadly, the observation that SETX can regulate the transcriptional activity of specific genes may have important implications for disorders where SETX function is compromised.
2016-12-03 | GSE52936 | GEO
Project description:The human helicase senataxin (SETX) has been linked to the neurodegenerative diseases amyotrophic lateral sclerosis (ALS4) and ataxia with oculomotor apraxia (AOA2). Here we identified a role for SETX in controlling the antiviral response. Cells that had undergone depletion of SETX and SETX-deficient cells derived from patients with AOA2 had higher expression of antiviral mediators in response to infection than did wild-type cells. Mechanistically, we propose a model whereby SETX attenuates the activity of RNA polymerase II (RNAPII) at genes stimulated after a virus is sensed and thus controls the magnitude of the host response to pathogens and the biogenesis of various RNA viruses (e.g., influenza A virus and West Nile virus). Our data indicate a potentially causal link among inborn errors in SETX, susceptibility to infection and the development of neurologic disorders. This SuperSeries is composed of the SubSeries listed below.
2015-03-30 | GSE52937 | GEO
Project description:SETX (senataxin) is an RNA/DNA helicase that has been implicated in transcriptional regulation and the DNA damage response through resolution of R-loop structures. Mutations in SETX result in either of two distinct neurodegenerative disorders. SETX dominant mutations result in a juvenile form of amyotrophic lateral sclerosis (ALS) called ALS4, whereas recessive mutations are responsible for ataxia called ataxia with oculomotor apraxia type 2 (AOA2). How mutations in the same protein can lead to different phenotypes is still unclear. To elucidate AOA2 disease mechanisms, we first examined gene expression changes following SETX depletion. We observed the effects on both transcription and RNA processing, but surprisingly observed decreased R-loop accumulation in SETX-depleted cells. Importantly, we discovered a strong connection between SETX and the macroautophagy/autophagy pathway, reflecting a direct effect on transcription of autophagy genes. We show that SETX depletion inhibits the progression of autophagy, leading to an accumulation of ubiquitinated proteins, decreased ability to clear protein aggregates, as well as mitochondrial defects. Analysis of AOA2 patient fibroblasts also revealed a perturbation of the autophagy pathway. Our work has thus identified a novel function for SETX in the regulation of autophagy, whose modulation may have a therapeutic impact for AOA2.
2020-08-24 | GSE135349 | GEO
Project description:Senataxin (SETX) is an RNA/DNA helicase that has been implicated in transcriptional regulation and the DNA damage response, through resolution of R-loop structures. Mutations in SETX result in either of two distinct neurodegenerative disorders. SETX dominant mutations result in a juvenile form of ALS (amyotrophic lateral sclerosis) named ALS4, while recessive mutations are responsible for an ataxia called AOA2 (ataxia with oculomotor apraxia type 2). How mutations in the same protein can lead to different phenotypes is still unclear. To elucidate AOA2 disease mechanisms, we first examined gene expression changes following SETX depletion. We observed effects on both transcription and RNA processing, but surprisingly observed decreased R-loop accumulation in SETX depleted cells. Importantly, we discovered a strong connection between SETX and the autophagy pathway, reflecting a direct effect on the transcription of autophagy genes. We show that SETX depletion inhibits the progression of autophagy, leading to an accumulation of ubiquitinated proteins, decreased ability to clear protein aggregates, as well as mitochondrial defects. Analysis of AOA2 patient fibroblasts also revealed a perturbation of the autophagy pathway. Our work has thus identified a novel function for SETX in the regulation of autophagy, whose modulation may have a therapeutic impact for AOA2.
2020-02-24 | GSE145675 | GEO
Project description:Senataxin (SETX) is an RNA/DNA helicase that has been implicated in transcriptional regulation and the DNA damage response, through resolution of R-loop structures. Mutations in SETX result in either of two distinct neurodegenerative disorders. SETX dominant mutations result in a juvenile form of ALS (amyotrophic lateral sclerosis) named ALS4, while recessive mutations are responsible for an ataxia called AOA2 (ataxia with oculomotor apraxia type 2). How mutations in the same protein can lead to different phenotypes is still unclear. To elucidate AOA2 disease mechanisms, we first examined gene expression changes following SETX depletion. We observed effects on both transcription and RNA processing, but surprisingly observed decreased R-loop accumulation in SETX depleted cells. Importantly, we discovered a strong connection between SETX and the autophagy pathway, reflecting a direct effect on the transcription of autophagy genes. We show that SETX depletion inhibits the progression of autophagy, leading to an accumulation of ubiquitinated proteins, decreased ability to clear protein aggregates, as well as mitochondrial defects. Analysis of AOA2 patient fibroblasts also revealed a perturbation of the autophagy pathway. Our work has thus identified a novel function for SETX in the regulation of autophagy, whose modulation may have a therapeutic impact for AOA2.
2020-02-26 | GSE145676 | GEO
Project description:Senataxin, encoded by the SETX gene, contributes to multiple aspects of gene expression, including transcription and RNA processing. Mutations in SETX cause the recessive disorder ataxia with oculomotor apraxia type 2 (AOA2) and a dominant juvenile form of amyotrophic lateral sclerosis (ALS4). To assess the functional role of senataxin in disease, we examined differential gene expression in AOA2 patient fibroblasts, identifying a core set of genes showing altered expression by microarray and RNA-sequencing. To determine whether AOA2 and ALS4 mutations differentially affect gene expression, we overexpressed disease-specific SETX mutations in senataxin-haploinsufficient fibroblasts and observed changes in distinct sets of genes. This implicates mutation-specific alterations of senataxin function in disease pathogenesis and provides a novel example of allelic neurogenetic disorders with differing gene expression profiles. Weighted gene co-expression network analysis (WGCNA) demonstrated these senataxin-associated genes to be involved in both mutation-specific and shared functional gene networks. To assess this in vivo, we performed gene expression analysis on peripheral blood from members of 12 different AOA2 families and identified an AOA2-specific transcriptional signature. WGCNA identified two gene modules highly enriched for this transcriptional signature in the peripheral blood of all AOA2 patients studied. These modules were disease-specific and preserved in patient fibroblasts and in the cerebellum of Setx knockout mice demonstrating conservation across species and cell types, including neurons. These results identify novel genes and cellular pathways related to senataxin function in normal and disease states, and implicate alterations in gene expression as underlying the phenotypic differences between AOA2 and ALS4. Total RNA samples obtained from 1) an AOA2 patient and carrier fibroblast cell lines, 2) 2 biological replicates of haploinsufficient SETX fibroblast cell lines transfected with one of 4 different wild-type and mutant SETX constructs, 3) peripheral blood from 33 patients and carriers across 12 families, and 4) 2 tissues from 2 Setx knockout and 2 control mice were analyzed using expression microarray. This submission represents the microarray component of study.
2014-09-15 | E-GEOD-61320 | biostudies-arrayexpress
Project description:Senataxin, encoded by the SETX gene, contributes to multiple aspects of gene expression, including transcription and RNA processing. Mutations in SETX cause the recessive disorder ataxia with oculomotor apraxia type 2 (AOA2) and a dominant juvenile form of amyotrophic lateral sclerosis (ALS4). To assess the functional role of senataxin in disease, we examined differential gene expression in AOA2 patient fibroblasts, identifying a core set of genes showing altered expression by microarray and RNA-sequencing. To determine whether AOA2 and ALS4 mutations differentially affect gene expression, we overexpressed disease-specific SETX mutations in senataxin-haploinsufficient fibroblasts and observed changes in distinct sets of genes. This implicates mutation-specific alterations of senataxin function in disease pathogenesis and provides a novel example of allelic neurogenetic disorders with differing gene expression profiles. Weighted gene co-expression network analysis (WGCNA) demonstrated these senataxin-associated genes to be involved in both mutation-specific and shared functional gene networks. To assess this in vivo, we performed gene expression analysis on peripheral blood from members of 12 different AOA2 families and identified an AOA2-specific transcriptional signature. WGCNA identified two gene modules highly enriched for this transcriptional signature in the peripheral blood of all AOA2 patients studied. These modules were disease-specific and preserved in patient fibroblasts and in the cerebellum of Setx knockout mice demonstrating conservation across species and cell types, including neurons. These results identify novel genes and cellular pathways related to senataxin function in normal and disease states, and implicate alterations in gene expression as underlying the phenotypic differences between AOA2 and ALS4. Total RNA samples obtained from 1) an AOA2 patient and carrier fibroblast cell lines, 2) 2 biological replicates of haploinsufficient SETX fibroblast cell lines transfected with one of 4 different wild-type and mutant SETX constructs, 3) peripheral blood from 33 patients and carriers across 12 families, and 4) 2 tissues from 2 Setx knockout and 2 control mice were analyzed using expression microarray. This submission represents the microarray component of study.
2014-09-15 | E-GEOD-61324 | biostudies-arrayexpress
Project description:Senataxin, encoded by the SETX gene, contributes to multiple aspects of gene expression, including transcription and RNA processing. Mutations in SETX cause the recessive disorder ataxia with oculomotor apraxia type 2 (AOA2) and a dominant juvenile form of amyotrophic lateral sclerosis (ALS4). To assess the functional role of senataxin in disease, we examined differential gene expression in AOA2 patient fibroblasts, identifying a core set of genes showing altered expression by microarray and RNA-sequencing. To determine whether AOA2 and ALS4 mutations differentially affect gene expression, we overexpressed disease-specific SETX mutations in senataxin-haploinsufficient fibroblasts and observed changes in distinct sets of genes. This implicates mutation-specific alterations of senataxin function in disease pathogenesis and provides a novel example of allelic neurogenetic disorders with differing gene expression profiles. Weighted gene co-expression network analysis (WGCNA) demonstrated these senataxin-associated genes to be involved in both mutation-specific and shared functional gene networks. To assess this in vivo, we performed gene expression analysis on peripheral blood from members of 12 different AOA2 families and identified an AOA2-specific transcriptional signature. WGCNA identified two gene modules highly enriched for this transcriptional signature in the peripheral blood of all AOA2 patients studied. These modules were disease-specific and preserved in patient fibroblasts and in the cerebellum of Setx knockout mice demonstrating conservation across species and cell types, including neurons. These results identify novel genes and cellular pathways related to senataxin function in normal and disease states, and implicate alterations in gene expression as underlying the phenotypic differences between AOA2 and ALS4. Total RNA samples obtained from 1) an AOA2 patient and carrier fibroblast cell lines, 2) 2 biological replicates of haploinsufficient SETX fibroblast cell lines transfected with one of 4 different wild-type and mutant SETX constructs, 3) peripheral blood from 33 patients and carriers across 12 families, and 4) 2 tissues from 2 Setx knockout and 2 control mice were analyzed using expression microarray. This submission represents the microarray component of study.
2014-09-15 | E-GEOD-61321 | biostudies-arrayexpress
Project description:Senataxin, encoded by the SETX gene, contributes to multiple aspects of gene expression, including transcription and RNA processing. Mutations in SETX cause the recessive disorder ataxia with oculomotor apraxia type 2 (AOA2) and a dominant juvenile form of amyotrophic lateral sclerosis (ALS4). To assess the functional role of senataxin in disease, we examined differential gene expression in AOA2 patient fibroblasts, identifying a core set of genes showing altered expression by microarray and RNA-sequencing. To determine whether AOA2 and ALS4 mutations differentially affect gene expression, we overexpressed disease-specific SETX mutations in senataxin-haploinsufficient fibroblasts and observed changes in distinct sets of genes. This implicates mutation-specific alterations of senataxin function in disease pathogenesis and provides a novel example of allelic neurogenetic disorders with differing gene expression profiles. Weighted gene co-expression network analysis (WGCNA) demonstrated these senataxin-associated genes to be involved in both mutation-specific and shared functional gene networks. To assess this in vivo, we performed gene expression analysis on peripheral blood from members of 12 different AOA2 families and identified an AOA2-specific transcriptional signature. WGCNA identified two gene modules highly enriched for this transcriptional signature in the peripheral blood of all AOA2 patients studied. These modules were disease-specific and preserved in patient fibroblasts and in the cerebellum of Setx knockout mice demonstrating conservation across species and cell types, including neurons. These results identify novel genes and cellular pathways related to senataxin function in normal and disease states, and implicate alterations in gene expression as underlying the phenotypic differences between AOA2 and ALS4. Total RNA samples obtained from 1) an AOA2 patient and carrier fibroblast cell lines, 2) 2 biological replicates of haploinsufficient SETX fibroblast cell lines transfected with one of 4 different wild-type and mutant SETX constructs, 3) peripheral blood from 33 patients and carriers across 12 families, and 4) 2 tissues from 2 Setx knockout and 2 control mice were analyzed using expression microarray. This submission represents the microarray component of study.
2014-09-15 | E-GEOD-61322 | biostudies-arrayexpress