Browse
Submit Data
Databases
API
Help

Dataset Information

0 Views

0 Connections

0 Citations

0 Reanalyses

0 Downloads

Omics score: 0

Correction of splicing defect in compound heterozygous FRDA patient carrying FXN 165+5G>C point mutation.

ABSTRACT: Friedreich’s ataxia is an autosomal recessive disease caused by mutations in the FXN gene. Approximately 95% of patients harbor homozygous GAA repeat expansion in the intron 1 of the FXN, while the remaining 5% are compound heterozygotes carrying GA expansion on 1 allele and point mutation on the other allele. Here, we characterized a G to C transversion in position 5 of the intron 1 of the FXN. Mutation results in profound downregulation of FXN mRNA and protein levels. Transcriptome and RT-PCR analyses demonstrated aberrant splicing of the FXN gene caused by this mutation that can be at least in part corrected with antisense oligonucleotides (ASOs) targeting intron 1.

ORGANISM(S): Homo sapiens

PROVIDER: GSE262763 | GEO | 2025/07/10

REPOSITORIES: GEO

ACCESS DATA

Json Xml

Dataset's files

Source:

			Action	DRS
		Other

Items per page:

1 - 1 of 1

Similar Datasets

Friedreich’s Ataxia Induced Pluripotent Stem Cells Recapitulate GAA•TTC Triplet-Repeat Instability

Project description:The inherited neurodegenerative disease Friedreich’s ataxia (FRDA) is caused by hyperexpansion of GAA•TTC trinucleotide repeats within the first intron of the FXN gene, encoding the mitochondrial protein frataxin. Long GAA•TTC repeats causes heterochromatin-mediated silencing and loss of frataxin in affected individuals. We report the derivation of induced pluripotent stem cells (iPSCs) from FRDA patient fibroblasts through retroviral transduction of transcription factors. FXN gene repression is maintained in the iPSCs, as are the mRNA and miRNA global expression signatures reflecting the human disease. GAA•TTC repeats uniquely in FXN in the iPSCs exhibit repeat instability similar to patient families, where they expand and/or contract with discrete changes in length between generations. The mismatch repair enzyme Msh2, implicated in repeat instability in other triplet repeat diseases, is highly expressed in the iPSCs, occupies FXN intron 1, and shRNA silencing of Msh2 impedes repeat expansion, providing a possible molecular explanation for repeat expansion in FRDA.

2010-07-02 | GSE22651 | GEO

Genetic interaction screen for FXN in K562 cells, to identify genes that are synthetic sick/buffering in the absence of robust Fe-S cluster synthesis

Project description:Friedreich’s ataxia (FA) is the most common monogenic mitochondrial disease. FA is caused by a depletion of the mitochondrial protein frataxin (FXN), an iron-sulfur (Fe-S) cluster biogenesis factor. To better understand the cellular consequences of FA, we performed genetic interaction mapping in control or FXN edited cells. This screen identified impaired mitochondrial translation downstream of FXN loss, and specifically highlighted the methyltransferase-like protein METTL17 as a candidate effector.

2023-12-18 | GSE242192 | GEO

Correction of splicing defect in compound heterozygous FRDA patient carrying FXN 165+5G>C point mutation.

Project description:Correction of splicing defect in compound heterozygous FRDA patient carrying FXN 165+5G>C point mutation.

| PRJNA1093135 | ENA

Friedreichâ??s Ataxia Induced Pluripotent Stem Cells Recapitulate GAAâ?¢TTC Triplet-Repeat Instability

Project description:The inherited neurodegenerative disease Friedreichâ??s ataxia (FRDA) is caused by hyperexpansion of GAAâ?¢TTC trinucleotide repeats within the first intron of the FXN gene, encoding the mitochondrial protein frataxin. Long GAAâ?¢TTC repeats causes heterochromatin-mediated silencing and loss of frataxin in affected individuals. We report the derivation of induced pluripotent stem cells (iPSCs) from FRDA patient fibroblasts through retroviral transduction of transcription factors. FXN gene repression is maintained in the iPSCs, as are the mRNA and miRNA global expression signatures reflecting the human disease. GAAâ?¢TTC repeats uniquely in FXN in the iPSCs exhibit repeat instability similar to patient families, where they expand and/or contract with discrete changes in length between generations. The mismatch repair enzyme Msh2, implicated in repeat instability in other triplet repeat diseases, is highly expressed in the iPSCs, occupies FXN intron 1, and shRNA silencing of Msh2 impedes repeat expansion, providing a possible molecular explanation for repeat expansion in FRDA. 65 samples from various number of tissue, primary cell lines undifferenatiated human embryonic stem cell lines, induces pluripotent stem cell lines have been run on Illumina HT12 v3 chips.

2010-07-30 | E-GEOD-22651 | biostudies-arrayexpress

Human Mitochondria NFS1-ISCU-FXN XL-MS

Project description:Frataxin (FXN) is involved in mitochondrial iron-sulfur (Fe-S) cluster biogenesis and serves to accelerate Fe-S cluster formation. FXN deficiency is associated with Friedreich ataxia, a neurodegenerative disease. Using chemical cross-linking (XL) accompanied with LC-MS/MS, we studied the the interaction between the core complexes Acp-ISD11-NFS1 (AIN) and AIN-ISCU (AINU) with FXN.

2018-07-11 | PXD006938 | Pride

Human Mitochondrial NFS1-FXN XL LS-MS/MS

2018-07-11 | PXD006928 | Pride

Total RNA sequencing of FXN knockdown in pulmonary artery endothelial cells

Project description:This data set provides different RNA expression data for primary human pulmonary endothelial cells with and without FXN deficiency achieved by RNAi transfection in an effort to understand the endothelial-specific effects of acquired frataxin (FXN) deficiency and their implications for pulmonary vascular disease.

2021-04-09 | GSE171692 | GEO

Transcriptional profiling of mouse embryonic fibroblasts harboring the Fxn G127V mutation

Project description:Friedreich's ataxia (FRDA) is a neurodegenerative disease caused by mutations in the frataxin (FXN) gene. In this study, we immortalized mouse embryonic fibroblasts (MEFs) derived from G127V Fxn mutant mice and compared them to the wild-type (WT) MEFs. Mutant G127V MEFs demonstrated decreased cell proliferation and ATP production, as well as an increase in reactive oxygen species (ROS) production when compared to WT cells. These phenotypes are partially corrected by exogenous expression of frataxin. Surprisingly, extended passaging of immortalized G127V Fxn MEFs improves their proliferation, and alleviates ATP deficiency as well as decreases ROS levels despite persistent frataxin deficiency. We defined gene expression changes associated with phenotypic adaptation of G127V mutant MEFs by comparing transcriptional profiles of early and late passage G127V MEFs with WT cells.

2025-01-22 | GSE255810 | GEO

Transcriptional profiling of mouse embryonic fibroblasts harboring the Fxn G127V mutation

Project description:Transcriptional profiling of mouse embryonic fibroblasts harboring the Fxn G127V mutation

| PRJNA1076569 | ENA

Determination of the spatial organization of the FXN gene locus by using Chromosome Conformation Capture technique coupled with High-throughtput sequencing (3C-seq).

Project description:Accumulating data from different groups have demonstrated that alteration of post-translational histone modifications is an important underlying mechanism for FXN silencing in FRDA. The relationship between chromatin architecture and histone modification marks in the FXN gene locus is likely to be important for understanding the silencing mechanism. We therefore investigated the spatial organization of the FXN gene locus using the 3C-sequencing method. EBV transformed lymphoblastoid cell lines derived from patients (GM15850, GM16234 and GM16798) and Healthy control (GM14664 and GM15851) were used for generating 3C-seq libraries.

2013-12-16 | E-GEOD-42961 | biostudies-arrayexpress

OmicsDI is part of the ELIXIR infrastructure

OmicsDI is an Elixir interoperability service. Learn more ›

Tweets

OmicsDI Databases

PRIDE
PeptideAtlas
MassIVE
JPOST Repository
Physiome Model Repository

EGA
EVA
ENA
LINCS
PAXDB
Cell Collective

MetaboLights
Metabolomics Workbench
MetabolomeExpress
GNPS
BioModels
FAIRDOMHub

ArrayExpress
dbGaP
ExpressionAtlas
GEO
NODE

Information

Databases
Help
API
Contact us
Code on GitHub
Terms of use
Submit Data