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Transcriptome analysis of familial dysautonomia reveals tissue-specific gene expression disruption in the peripheral nervous system

ABSTRACT: Transcriptome analysis of familial dysautonomia reveals tissue-specific gene expression disruption in the peripheral nervous system

PROVIDER: PRJNA963995 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24360200_1.fastq.gz	Fastqsanger.gz
	SRR24360200_2.fastq.gz	Fastqsanger.gz
	SRR24360201_1.fastq.gz	Fastqsanger.gz
	SRR24360201_2.fastq.gz	Fastqsanger.gz
	SRR24360202_1.fastq.gz	Fastqsanger.gz

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Transcriptome analysis of familial dysautonomia reveals tissue-specific gene expression disruption in the peripheral nervous system

Project description:Familial Dysautonomia (FD) is a rare recessive neurodevelopmental disease caused by a splice site mutation in the Elongator acetyltransferase complex subunit 1 (ELP1) leading to tissue-specific skipping of exon 20 and reduction of the ELP1 protein, distinctly in the central nervous system (CNS) and peripheral nervous system (PNS). Here we performed a transcriptome-wide study to dissect the molecular mechanisms underlying FD in specific neuronal tissues from the FD phenotypic mouse which expresses human ELP1, including the dorsal root ganglion (DRG), trigeminal ganglion (TG), medulla (MED), cortex, and spinal cord (SC). We focused our analyses on differentially expressed genes (DEGs) representing the most dominant transcriptomic alterations; and on genes in co-expression modules that are highly correlated with full-length ELP1 expression (ELP1 dose-responsive genes). We identified higher number of DEGs (342) in the PNS (DRG, TG) as compared to the CNS (MED, SC, Cortex) (143). ELP1 dose-responsive genes are only found in DRG, TG, and MED, not in Cortex or SC, tissues. Gene Ontology analyses of both DEGs and ELP1-dose-responsive genes highlight the regulation of neurotransmitters. The transcriptome-wide signals were highly convergent between PNS tissues (DRG and TG) but not among CNS tissues. Those convergent genes were enriched for known protein-protein interactions and cell type-specific markers defining myelinated neurons and peptidergic nociceptors. Our findings support the involvement of specific neuronal subtypes underlying the PNS phenotypes in FD. Our study comprehensively investigates transcriptome-wide alterations in FD neuronal tissues and identifies the functional dysregulations in the peripheral nervous system contributing to disease.

2023-09-28 | GSE230867 | GEO

Transcriptome analyses of the nervous system of Familial Dysautonomia-model mice identify novel cellular pathways dependent on Ikbkap/Elp1 (CNS)

Project description:Familial Dysautonomia (FD; OMIM #223900) is both a developmental and progressive autosomal recessive neurodegenerative disorder that results from a nervous-system reduction in the IKAP/ELP1 protein due to a mutation in a splice acceptor site of the IKBKAP/ELP1 gene. The function of this gene in the nervous system is unresolved. To obviate the embryonic lethality of mice completely null for Ikbkap, we generated conditional knock out (CKO) mouse models for FD that recapitulate hallmarks of the human disease. To derive insight into potential intracellular functions for Ikbkap, we conducted a genome-wide transcriptome analysis of both the peripheral and central nervous systems from Ikbkap CKO mice, and identify over 100 shared misregulated genes that reveal roles for IKAP in several metabolic and signaling pathways in addition to synaptic transmission. Importantly, our data are the first to demonstrate that in the absence of IKAP, neurons undergo intracellular stress that is marked by transcriptional elevations in ATF5, p53, and several CREB target genes, as well as an increase in reactive oxygen species. These data will aid in the identification of common upstream and downstream targets for therapeutics for preventing the progressive demise of neurons in FD and potentially other neuropathies.

2020-04-30 | GSE80107 | GEO

Effects of IKAP/hELP1 deficiency on gene expression in differentiating neuroblastoma cells, implications for Familial dysautonomia

Project description:Investigate IKAP importance in the development of neuronal cells, in order to understand Familial dysautonomia phenotype.

2011-01-06 | GSE26458 | GEO

RNA sequencing of hiPSC derived neural crest populations from Familial Dysautonomia patients

2016-10-25 | GSE67073 | GEO

Transcription profiling by array of human olfactory ecto-mesenchymal stem cells in familial dysautonomia

Project description:Exploration of transcriptome expression in 5 control and 4 familial dysautonomia (FD) human olfactory ecto-mesenchymal stem cells (hOE-MSCs) at very early (P1 and P2) and later (P5 and P9) cell passages.

2011-01-01 | E-MTAB-281 | biostudies-arrayexpress

Effects of IKAP/hELP1 deficiency on gene expression in differentiating neuroblastoma cells, implications for Familial dysautonomia

Project description:Investigate IKAP importance in the development of neuronal cells, in order to understand Familial dysautonomia phenotype. Stable SHSY5Y cell lines, and control cells, in differentiated and un-differentiated conditions.

2011-01-06 | E-GEOD-26458 | biostudies-arrayexpress

RNA sequencing of hiPSC derived neural crest populations from Familial Dysautonomia patients

Project description:We have generated expression profiles of induced pluripotent stem cells (iPSCs) and iPSC-derived neural crest populations from Familial Dysautonomia patients. These profiles were compared to a normal iPSC line that does not harbor the IKBKAP mutation. All cell types were differentiated from patient derived iPSCs. Bulk iPSCs were harvested for RNA and the neural crest populations were sorted on day 18 for p75/HNK1 before RNA isolation.

2016-10-25 | E-GEOD-67073 | biostudies-arrayexpress

Transcriptome analyses of the nervous system of Familial Dysautonomia-model mice identify novel cellular pathways dependent on Ikbkap/Elp1

Project description:Transcriptome analyses of the nervous system of Familial Dysautonomia-model mice identify novel cellular pathways dependent on Ikbkap/Elp1

| PRJNA318069 | ENA

Transcription profiling of human olfactory ecto-mesenchymal stem cells (hOE-MSCs) from familial dysautonomia (FD) patients with or without kinetin treatment

Project description:Human olfactory ecto-mesenchymal stem cells (hOE-MSCs) from controls and familial dysautonomia (FD) patients were cultured in either sphere-forming conditions (ITS + EGF + bFGF) or in the presence of retinoic acid, forskolin and Sonic Hedgehog (rafnshh) for 7 days to induce neuroglial differentiation and were also treated or not with kinetin (100 mM for 48h) which corrects the aberrant splicing of IKBKAP mRNA. We used the recently described model of human olfactory ecto-mesenchymal stem cells to identify genes differentially expressed between controls and familial dysautonomia patients, and also the genes sensitive to kinetin which corrects aberrant splicing of IKBKAP mRNA

2012-01-01 | GSE27915 | GEO

Gut microbiome dysbiosis drives metabolic dysfunction in Familial dysautonomia

Project description:Familial dysautonomia (FD) is a rare genetic neurologic disorder caused by impaired neuronal development and progressive degeneration of both the peripheral and central nervous systems. FD is monogenic, with >99.4% of patients sharing an identical point mutation in the elongator acetyltransferase complex subunit 1 (ELP1) gene, providing a relatively simple genetic background in which to identify modifiable factors that influence pathology. Gastrointestinal symptoms and metabolic deficits are common among FD patients, which supports the hypothesis that the gut microbiome and metabolome are altered and dysfunctional compared to healthy individuals. Here we show significant differences in gut microbiome composition (16 S rRNA gene sequencing of stool samples) and NMR-based stool and serum metabolomes between a cohort of FD patients (~14% of patients worldwide) and their cohabitating, healthy relatives. We show that key observations in human subjects are recapitulated in a neuron-specific Elp1-deficient mouse model, and that cohousing mutant and littermate control mice ameliorates gut microbiome dysbiosis, improves deficits in gut transit, and reduces disease severity. Our results provide evidence that neurologic deficits in FD alter the structure and function of the gut microbiome, which shifts overall host metabolism to perpetuate further neurodegeneration.

2022-12-06 | MTBLS5138 | MetaboLights

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