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Next generation sequencing reveals upregulation of the lncRNA LINC-PINT in the substantia nigra of human Parkinson's disease patients compared to control donors

ABSTRACT: Next generation sequencing reveals upregulation of the lncRNA LINC-PINT in the substantia nigra of human Parkinson's disease patients compared to control donors

PROVIDER: PRJNA471671 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR10173300.fastq.gz	Fastqsanger.gz
	SRR10173301.fastq.gz	Fastqsanger.gz
	SRR10173302.fastq.gz	Fastqsanger.gz
	SRR10173303.fastq.gz	Fastqsanger.gz
	SRR10173305.fastq.gz	Fastqsanger.gz

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Next generation sequencing reveals upregulation of the lncRNA LINC-PINT in the substantia nigra of human Parkinson's disease patients compared to control donors

Project description:Parkinson's disease (PD) is the second most common neurodegenerative disease, involving the selecive death of dopaminergic neurons in the substantia nigra pars compacta brain region. Here, we performed next generation sequencing on RNA extracted from human substantia nigra tissue. The samples, acquired from the Netherland's Brain Bank, were taken post-mortem from PD and non-PD control donors. Analysis of the data revealed an upregulation of lncRNA LINC-PINT in PD substantia nigra. LINC-PINT interracts with the Polycomb Repressive Complex 2 (PRC2), inhibiting the tracription of multiple targets. Correspondingly, analysis of the data revealed that targets of PRC2 displayed larger disease-associated differences as compared to other genes, as well as enrichment for downregulation, suggesting that the differential expression of LINC-PINT in PD effects LINC-PINT/PRC2 interaction as well.

2020-04-14 | GSE114517 | GEO

TWIST1 methylation by SETD6 selectively antagonizes LINC-PINT expression in Glioblastoma multiforme

Project description:Glioblastoma multiforme (GBM) is the most common and aggressive malignant brain tumor among adults, which is characterized by high invasion, migration and proliferation abilities. One important process that contributes to the invasiveness of GBM is the epithelial to mesenchymal transition (EMT). EMT is regulated by a set of defined transcription factors which tightly regulate this process, among them is the basic helix-loop-helix family member, TWIST1. Here we show that TWIST1 is methylated on lysine-33 at chromatin by SETD6, a methyltransferase with expression levels correlating with poor survival in GBM patients. RNA-seq analysis in U251 GBM cells suggested that both SETD6 and TWIST1 regulate cell adhesion and migration processes. We further show that TWIST1 methylation attenuates the expression of the long-non-coding RNA, LINC-PINT, thereby suppressing EMT in GBM. Mechanistically, TWIST1 methylation represses the transcription of LINC-PINT by increasing the occupancy of EZH2 and the catalysis of the repressive H3K27me3 mark at the LINC-PINT locus. Under un-methylated conditions, TWIST1 dissociates from the LINC-PINT locus, allowing the expression of LINC-PINT which leads to increased cell adhesion and decreased cell migration. Together, our findings unravel a new mechanistic dimension for selective expression of LINC-PINT mediated by TWIST1 methylation.

2022-08-12 | PXD029361 | Pride

Age-mediated transcriptomic changes in adult mouse substantia nigra

Project description:Substantia nigra pars compacta (SNpc) is highly sensitive to normal aging and selectively degenerates in Parkinson's disease. Until now, molecular mechanisms behind SNpc aging have not been fully investigated using high throughput techniques. Here, aging-associated early changes in transcriptome of SNpc were investigated comparing late middle-aged (18 months old) to young (2 months old) mice.

2013-05-29 | GSE45043 | GEO

The human lncRNA LINC-PINT inhibits tumor cell migration through a highly conserved sequence element

Project description:It is now obvious that the majority of cellular transcripts do not code for proteins, and a significant subset of them are long noncoding RNAs (lncRNAs). Many lncRNAs show aberrant expression in cancer, and some of them have been linked to cellular transformation. However, the underlying mechanisms remain poorly understood. Here we characterize the function of the p53-regulated human lncRNA LINC-PINT in cancer. We found that LINC-PINT acts as tumor suppressor lncRNA. Its expression is downregulated in multiple types of cancer and correlates with good prognosis in lung adenocarcinoma. LINC-PINT inhibits the migration capacity and invasive phenotype of cancer cells in vitro and in vivo, and it does so by repressing a proinvasion gene signature in a PRC2-dependent manner. By applying cross-species conservation analysis combined with functional experimental validations we found that the function of LINC-PINT is highly dependent on a short sequence conserved across mammals, sequence that mediates the interaction with PRC2. We propose that LINC-PINT may function as a molecular exchanger that provides PRC2 to active gene promoters for their silencing, mechanisms that could be shared by other PRC2-interacting lncRNAs.

2017-09-27 | GSE98928 | GEO

Single-Cell Transcriptomics of Human Substantia Nigra in Parkinson's Disease

Project description:Single-Cell Transcriptomics of Human Substantia Nigra in Parkinson's Disease

| PRJNA767088 | ENA

A lncRNA survey finds increases in neuroprotective LINC-PINT in Parkinson's disease substantia nigra.

Project description:Recent reports highlight regulatory functions of long noncoding RNAs (lncRNAs) in neurodegeneration and aging, but biomedical implications remain limited. Here, we report an rRNA-depletion-based long RNA-Sequencing Resource of 65 substantia nigra, amygdala, and medial temporal gyrus samples from Parkinson's disease (PD) and matched control brains. Using a lncRNA-focused analysis approach to identify functionally important transcripts, we discovered and prioritized many lncRNAs dysregulated in PD. Those included pronounced elevation of the P53-induced noncoding transcript LINC-PINT in the substantia nigra of PD patients, as well as in additional models of oxidative stress and PD. Intriguingly, we found that LINC-PINT is a primarily neuronal transcript which showed conspicuous increases in maturing primary culture neurons. LINC-PINT also accumulated in several brain regions of Alzheimer's and Huntington's disease patients and decreased with healthy brain aging, suggesting a general role in aging and neurodegeneration for this lncRNA. RNAi-mediated depletion of LINC-PINT exacerbated the death of cultured N2A and SH-SY5Y cells exposed to oxidative stress, highlighting a previously undiscovered neuroprotective role for this tumor-inducible lncRNA in the brains of patients with neurodegenerative disorders.

| S-EPMC7059180 | biostudies-literature

Gene expression profiling of substantia nigra: a post-mortem study in Parkinson's disease and control subjects

Project description:Introduction: Parkinson's disease (PD) is characterized by bradykinesia, tremor, and rigidity; in addition, postural instability sets in as the disease progresses. Non-motor symptoms of the disease include cognitive, behavioral, and neuropsychiatric changes, sensory and sleep disturbances that may precede the motor symptoms of the disease itself. The peculiar pathological features of PD are decreased dopaminergic neurons and dopamine levels in the substantia nigra pars compacta and pontine locus ceruleus. The study of the transcriptome plays a major role in the identification of genes and gene regulatory mechanisms in multifactorial neurodegenerative diseases such as Parkinson's disease itself. Therefore, we proposed to study the transcriptome directly in the midbrain containing the "Substantia nigra.The study was performed in 8 subjects with PD and 6 normal control subjects, using next-generation sequencing (NGS) technologies. Results: With the use of an ad hoc bioinformatics pipeline, gene expression profiles in the different PD subjects were obtained and compared to those of controls. In detail, the results obtained from the data analysis indicated 92 differentially expressed genes (FDR-adjusted p value ≤0.05 and fold-change less than -1.5 or greater than +1.5) of which 33 genes were up-regulated while 59 were down-regulated. Conclusions: Functional analysis of the differentially expressed genes revealed several genes involved in different canonical pathways indicating their likely significant role in Parkinson's disease.

2024-01-03 | E-MTAB-13295 | biostudies-arrayexpress

Transcription profiling of human substantia nigra from postmortem brain of Parkinsons disease patients (PD)

Project description:We used microarrays to detail the global program of gene expression underlying Parkinson's disease Experiment Overall Design: Substantia nigra tissue from postmortem brain of normal and Parkinson disease patients were used for RNA extraction and hybridization on Affymetrix microarrays: 9 replicates for the controls and 16 replicates for the Parkinson's disease patients were used. Both cohorts included males and females.

2008-11-06 | E-GEOD-7621 | biostudies-arrayexpress

Transcriptomic profiling of substantia nigra and putamen in Parkinson’s disease

Project description:We report RNA sequencing results of human substantia nigra and putamen samples from Parkinson's disease patients and controls. Each substantia nigra sample is the result of pooling brain tissue from two individuals with the same , while each putamen sample is the result of pooling brain tissue from three individuals. We found 354 differentially expressed genes (DEGs) in the SN of PD patients compared to age-matched controls, while we observed 261 DEGs in the putamen samples. The top-enriched pathways from the SN were associated with “protein folding” and “neurotransmitter transport”, and the putamen DEGs with “synapse organization”. In summary, our data confirms the key role of protein folding and neuronal degeneration in the pathology of PD, and highlights new genes and pathways that have not yet been explored in the context of PD.

2020-09-02 | GSE136666 | GEO

Gene expression in Parkinson modeled mouse substantia nigra pars compacta at single cell resolution

Project description:Strong evidence in human populations indicates that pesticide exposure increases the risk of Parkinson's disease . However, to date there has no study investigating the role of genetic pathways for pesticide induced PD at cellular resolution. We used single cell RNA sequencing to provide fine-grained information on the genetic pathways of Parkinson's disease caused by a combined regimen of maneb and paraquat. We investigated the substantia nigra pars compacta of control mice and mice treated with maneb and paraquat to identify changes in gene expression in cellular subpopulations such as neurons, glia and vascular cells. This work reveals how neuronal and non-neuronal cells interact in the context of a toxicologically and environmentally relevant model Parkinson's disease, while offering entry points to the design of new therapies.

2021-11-03 | GSE187012 | GEO

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