Hyperactivation of Necdin, a new biomarker for Cockayne syndrome neurological disease
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ABSTRACT:
ORGANISM(S): Mus musculus
PROVIDER: GSE206854 | GEO | 2022/06/27
REPOSITORIES: GEO
Similar Datasets
Project description:Hyperactivation of Necdin, a new biomarker for Cockayne syndrome neurological disease
| PRJNA852509 | ENA
Project description:Mutations in the Cockayne Syndrome group B (CSB) gene cause severe neurodevelopmental defects and premature aging. As a member of the SWI/SNF family of chromatin remodelers, CSB is best known for its role in transcription-coupled nucleotide excision (TC-NER), but this function neither explains the major disease phenotype nor offers any clue about the selective vulnerability in neurons. Pursuing Cockayne Syndrome-associated genome instability, we uncover an intrinsic mechanism by which elongating RNA polymerase II (RNAPII) undergoes transient pausing at internal T-runs where CSB is required to push RNAPII forward. Consequently, CSB deficiency retards RNAPII elongation in these regions, and when coupled upstream G-rich sequences, such functional defects are further amplified to induce genome instability via augmented R-loop formation. As such R-loop prone motifs are proportionally represented in long genes that predominately function in neurons, this mechanism provides critical insights into selective neuronal vulnerability. Moreover, because of divergent intronic sequences between mice and humans, this mechanism also explains why mice deficient for CSB do not develop severe neurological abnormalities as seen in humans, suggesting that the manifestation of Cockayne Syndrome phenotype results from progressive genome evolution in mammals.
2024-07-29 | GSE226204 | GEO
Project description:Cockayne syndrome is an inherited premature aging syndrome associated with developmental and neurological disorders. Mutations in the genomic locus encoding CSB are associated with 80% Cockayne syndrome cases. Transcription profiling assays reveal the association of mis-regulation of gene expression with Cockayne syndrome, highlighting the importance of CSB in transcription regulation. However, many questions remain unanswered as how CSB regulates transcription. In this study, we dissect the mechanisms by which CSB regulates transcription during normal growth. By anti-CSB chromatin immunoprecipitation followed by deep sequencing, we found CSB is enriched at genomic regions containing TGASTCA motifs, to which the immediate early gene product C-Jun binds specifically. We further demonstrate that c-Jun co-immunoprecipitates with CSB. In addition, the targeting of CSB to genomic region containing TGASTCA motifs was drastically reduced in cells treated c-Jun shRNA. Reverse transcription followed by quantitative PCR indicates that CSB can regulate gene expression nearby its binding sites, both in activation and repression. The remodeling defective CSBM-bM-^HM-^FN1 mutant is also targeted to TGASTCA motifs, but cannot always substitute CSB function in transcription regulating, suggesting the importance of remodeling by CSB in transcription regulation. Notably, the Cockayne syndrome related mutation encoding protein CSBR670W, which is defective in ATP hydrolysis but is targeted to TGASTCA motifs efficiently, indicating that ATP hydrolysis is dispensable for c-Jun mediated CSB targeting, in sharp contrast to the ATP-dependent targeting mechanism by which CSB is relocated to DNA lesion stalled transcription. Together, these results reveal a second CSB targeting mechanism in which DNA sequence specific transcription factor c-Jun targets CSB to specific genomic region and regulate gene expression. Genomic localization of CSB and remodeling deficient CSBM-bM-^HM-^FN1
2014-03-06 | E-GEOD-50171 | biostudies-arrayexpress
Project description:Cockayne syndrome is an inherited premature aging syndrome associated with developmental and neurological disorders. Mutations in the genomic locus encoding CSB are associated with 80% Cockayne syndrome cases. Transcription profiling assays reveal the association of mis-regulation of gene expression with Cockayne syndrome, highlighting the importance of CSB in transcription regulation. However, many questions remain unanswered as how CSB regulates transcription. In this study, we dissect the mechanisms by which CSB regulates transcription during normal growth. By anti-CSB chromatin immunoprecipitation followed by deep sequencing, we found CSB is enriched at genomic regions containing TGASTCA motifs, to which the immediate early gene product C-Jun binds specifically. We further demonstrate that c-Jun co-immunoprecipitates with CSB. In addition, the targeting of CSB to genomic region containing TGASTCA motifs was drastically reduced in cells treated c-Jun shRNA. Reverse transcription followed by quantitative PCR indicates that CSB can regulate gene expression nearby its binding sites, both in activation and repression. The remodeling defective CSB∆N1 mutant is also targeted to TGASTCA motifs, but cannot always substitute CSB function in transcription regulating, suggesting the importance of remodeling by CSB in transcription regulation. Notably, the Cockayne syndrome related mutation encoding protein CSBR670W, which is defective in ATP hydrolysis but is targeted to TGASTCA motifs efficiently, indicating that ATP hydrolysis is dispensable for c-Jun mediated CSB targeting, in sharp contrast to the ATP-dependent targeting mechanism by which CSB is relocated to DNA lesion stalled transcription. Together, these results reveal a second CSB targeting mechanism in which DNA sequence specific transcription factor c-Jun targets CSB to specific genomic region and regulate gene expression.
2014-03-06 | GSE50171 | GEO
Project description:Cockayne syndrome is an inherited premature aging syndrome associated with developmental and neurological disorders. Mutations in the genomic locus encoding CSB are associated with 80% Cockayne syndrome cases. CSB is invovled in relieving UV-induced and oxidative stree. To gain more insights into the fucntion of CSB under these stress, we use ChIP-seq to determine the genomic localization of CSB 1 hour after UV irradiation and menadione treatment. Genomic localization of CSB and remodeling deficient CSBâN1
2015-11-09 | E-GEOD-50925 | biostudies-arrayexpress
Project description:Cockayne syndrome is an inherited premature aging syndrome associated with developmental and neurological disorders. Mutations in the genomic locus encoding CSB are associated with 80% Cockayne syndrome cases. CSB is invovled in relieving UV-induced and oxidative stree. To gain more insights into the fucntion of CSB under these stress, we use ChIP-seq to determine the genomic localization of CSB 1 hour after UV irradiation and menadione treatment.
2015-11-09 | GSE50925 | GEO
Project description:Cockayne Syndrome (CS) is a rare neurodegenerative disease characterized by short stature, cachexia, sun-sensitivity, accelerated aging, and short lifespan. Mutations in two human genes, ERCC8/CSA and ERCC6/CSB, are causative for CS and the protein products of these genes, CSA and CSB, while structurally unrelated, play roles in DNA repair and other aspects of DNA metabolism in human cells. Many clinical and molecular features of CS remain poorly understood, and it has been suggested that CSA and CSB regulate transcription of rDNA genes and ribosome biogenesis. The goal of this study was to investigate the dysregulation of rRNA synthesis in CS. Here, we report that Nucleolin (Ncl), a nucleolar protein that regulates rRNA synthesis and ribosome biogenesis, interacts specifically with CSA and CSB. In addition, CSA induces ubiquitination of Ncl, enhances binding of CSB to Ncl, and CSA and CSB both stimulate binding of Ncl to rDNA and subsequent rRNA synthesis. These findings suggest that CSA and CSB are positive regulators of rRNA synthesis via Ncl regulation. A majority of CS patients carry mutations in CSA and CSB and present with similar clinical features, thus our findings may provide novel insights into disease mechanism and the neuropathological features of CS.
2020-03-16 | GSE122736 | GEO
Project description:Cockayne syndrome (CS) is an accelerated aging disorder, caused by mutations in the CSA or CSB genes. In CSB-deficient cells, poly (ADP ribose) polymerase (PARP) is persistently activated by unrepaired DNA damage and PARP consumes and depletes cellular nicotinamide adenine dinucleotide (NAD), which leads to mitochondrial dysfunction. Here, the distribution of poly (ADP ribose) (PAR) was determined in CSB-deficient cells using ADPr-ChAP (ADP ribose-chromatin affinity purification), and the results show striking enrichment of PAR at transcription start sites (TSS), depletion of heterochromatin, and downregulation of H3K9me3-specific methyltransferases SUV39H1 and SETDB1. Induced-expression of SETDB1 in CSB-deficient cells downregulated PAR and normalized mitochondrial function. The results suggest that defects in CSB are strongly associated with loss of heterochromatin, downregulation of SETDB1, increased PAR in highly-transcribed regions, and mitochondrial dysfunction.
2019-06-22 | GSE133176 | GEO
Project description:Cockayne syndrome (CS) is a rare genetic neurodevelopmental disorder, characterized by a deficiency in the transcription-coupled nucleotide excision repair pathway. Mutation of Cockayne syndrome B (CSB) affects basal transcription which is considered a major cause of CS neurological dysfunction. Here, we generated a rat model by mimicking a nonsense mutation in the CSB(ERCC6) gene of CS-B patients. CSB-deficient rats exhibit the well-known CS repair characteristics: inability to resume RNA synthesis from stalled RNA polymerase II (RNAP II) and persistent gamma H2AX overexpression after UV damage. In contrast to that of the Csb-/- mouse models, the cerebella of the CSB-deficient rats are more profoundly affected. Both the molecular and the granular layers of the cerebellum cortex showed significant atrophy. The white matter of the cerebellum demonstrated high GFAP staining indicative of reactive astrogliosis. RNA-seq analysis of CSB-deficient rat cerebella revealed that even in the absence of UV damage, CSB affects the expression of hundreds of genes, many of which are neuronal genes, suggesting that transcription dysregulation could contribute to the neurological features in CSB rat models.
2019-02-05 | GSE126032 | GEO
Project description:Cockayne syndrome (CS) is an inherited neurodevelopmental disorder with progeroid features. Although the genes responsible for CS have been implicated in a variety of DNA repair- and transcription-related pathways, the nature of the molecular defect in CS remains mysterious. We sought to define this defect by expression analysis of cells lacking functional CSB, a SWI/SNF-like ATPase that is responsible for most CS cases. Keywords: primary disease rescue
2006-07-14 | GSE3407 | GEO