Homo sapiens
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ABSTRACT:
PROVIDER: PRJNA121403 | ENA |
REPOSITORIES: ENA
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Project description:TAR DNA-binding protein 43 (TDP-43) is the major protein component of neuronal inclusions characterizing the adult-onset neurodegenerative diseases amyotrophic lateral sclerosis (ALS) and frontotemporal lobar degeneration with ubiquitinated inclusions (FTLD-TDP). Whereas TDP-43 was originally identified as a DNA-binding protein that bound the HIV-1 trans-activation response (TAR) DNA element, recent work elucidating its role in neurodegenerative disease pathogenesis has largely focused on TDP-43’s role as an RNA-binding protein. Here, we demonstrate that in human cells, TDP-43 binds DNA genome-wide, with strong enrichment at small nuclear RNA (snRNA) genes. Moreover, TDP-43 binding to snRNA genes is not dependent on RNA, and the snRNA products of TDP-43-bound sites are incorporated into Smith antigen-containing snRNPs. Furthermore, TDP-43 knockdown increases expression of bound snRNA genes, supporting a role for TDP-43 in the negative regulation of snRNA biogenesis. Finally, ALS-associated missense mutations in the gene encoding TDP-43, TARDBP, reduce binding to snRNA genes. Together, our data suggest that the DNA-binding role of TDP-43 is important in health and in disease, and aberrant TDP-43 binding to snRNA gene loci may alter splicing function in ALS and FTLD-TDP.
2023-12-21 | GSE117873 | GEO
Project description:TDP-43 is an RNA/DNA-binding protein implicated in transcriptional repression and mRNA processing. Inclusions of TDP-43 are hallmarks of frontotemporal dementias and amyotrophic lateral sclerosis. Besides aggregation of TDP-43, loss of nuclear localization is observed in disease. To identify relevant targets of TDP-43, we performed an expression profiling study. Thereby, histone deacetylase 6 (HDAC6) downregulation was discovered upon TDP-43 silencing on mRNA and protein level in human embryonic kidney HEK293E and neuronal SH-SY5Y cells. This was accompanied by accumulation of the major HDAC6 substrate, acetyl-tubulin. Expression of wild-type but neither RNA-binding- nor nuclear-localization-deficient TDP-43 restored HDAC6 expression. Moreover, TDP-43 bound specifically to HDAC6 mRNA arguing for a direct functional interaction. Importantly, in vivo validation in TDP-43 knockout Drosophila melanogaster also showed HDAC6 mRNA decrease. HDAC6 is necessary for protein aggregate formation and degradation. Indeed, downregulation of HDAC6 reduced aggregate formation and increased cytotoxicity of expanded poly-glutamine ataxin-3 in TDP-43 silenced cells. This was completely restored by co-transfection with HDAC6. In conclusion, loss of functional TDP-43 causes HDAC6 downregulation and might thereby contribute to pathogenesis.
2009-10-20 | GSE18632 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE245332 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE245331 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE230409 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE230408 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE230406 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE230405 | GEO
Project description:TAR DNA-binding protein 43 (TDP-43) is an RNA/DNA-binding protein involved in many aspects of RNA metabolism, but its molecular roles in regulating gene and tTransposable eElements (TEs) transcription transcription is not extensively explored. TDP-43 loss-of-function via due to progressive cytoplasmic aggregations serves as a pathological hallmark and potential causality for several neurodegenerative diseases. While rRecent evidence suggest TDP-43 acute knockdown of TDP-43 affects the formation of R-loops formation, a nuclear DNA:RNA hybrid structures implicated in transcription regulation, . However, how its stable and chronic functional perturbation of TDP-43, which more closely resembles age-related neurodegeneration, impact global transcriptome via R-loop dysregulation remains unclear. Here we show demonstrate that stable and prolonged TDP-43 loss-of-function results in slowed impaired cell proliferation and impaired DNA damage response. At the molecular level, TDP-43 stable knockdown impacts key gene expression through concomitantly altering intragenic R-loops dynamics and its crosstalk with and thea DNA covalent modification 5-hydroxymethylcytosine (5hmC) in cis, as well as long- range R-loops-mediated enhancer-promoter interactions in trans. Furthermore, we find TDP-43 stable knockdown induces massive disease-related TEstransposable elements (TEs) activation via influencing R-loop and 5hmC homeostasis in many of these loci. Our results highlight previous underdeveloped transcriptional roles of TDP-43 via R-loops regulation in coding genes, distal regulatory elements and TEs, and suggest that TDP-43 proteinopathies transcriptionally contributes to the etiology of neurodegenerative disorders.
2024-01-03 | GSE230407 | GEO
Project description:MicroRNAs (miRNAs) play important roles in a wide range of cellular processes. Aberrant regulation of miRNA genes contributes to human diseases, including cancer. The TAR DNA binding protein 43 (TDP-43), a DNA/RNA binding protein associated with neurodegeneration, is involved in miRNA biogenesis. Here, we systematically examined miRNAs whose expression levels are regulated by TDP-43 using RNA-Seq coupled with siRNA-mediated knockdown approach. TDP-43 knocking down affected the expression of a number of miRNAs. Alterations in isomiR patterns and miRNA arm selection after TDP-43 knockdown suggest a role of TDP-43 in miRNA editing. We examined correlation of selected TDP-43 associated miRNAs and their candidate target genes in human cancers. Our data reveal highly complex roles of TDP-43 in regulating different miRNAs and their target genes. Our results suggest that TDP-43 may promote migration of lung cancer cells by regulating miR-423-3p expression. On the other hand, TDP-43 increases miR-500a-3p expression and binds to the mature miR-500a-3p sequence. Low expression of miR-500a-3p was associated with poor survival of lung cancer patients, suggesting that TDP-43 may have a suppressive role in cancer by regulating miR-500a-3p. Our experiments reveal that cancer-associated genes LIF and PAPPA may be targets of miR-500a-3p. Together with other studies, our work suggests that TDP-43-regulated miRNAs may play multi-facet roles in the pathogenesis of cancer. small RNA seq in SH-SY-5Y, SNB-19 and HT22 (TDP-43 siRNA VS Control siRNA)
2016-08-02 | E-GEOD-85065 | biostudies-arrayexpress