Ontology highlight
ABSTRACT:
PROVIDER: PRJNA524323 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR13574907_1.fastq.gz | Fastqsanger.gz | |||
| SRR13574907_2.fastq.gz | Fastqsanger.gz | |||
| SRR13574908_1.fastq.gz | Fastqsanger.gz | |||
| SRR13574908_2.fastq.gz | Fastqsanger.gz | |||
| SRR13574909_1.fastq.gz | Fastqsanger.gz |
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Project description:Fuchs’ endothelial corneal dystrophy is major corneal disorder in the western world affecting the innermost part of the cornea, which leads to visual impairment. The morphological changes observed in Fuchs’ endothelial corneal dystrophy is well described, however, much less in known of the pathology at the molecular level. As the morphological changes observed in the cornea is profound in the extracellular matrix we sought to determine in protein profiles and changes herein in the Descement’s membrane and endothelium layer of Fuchs’ endothelial conrneal dystrophy patients when compared to healthy control tissue. Using the extracted ion chromatogram label-free MS based quantification method we quantified approximately the 50 most abundant proteins of the Descemet’s membrane and endothelial layer in in patient and control tissue. In addition, using the isobaric tag for relative and absolute quantification MS method resulted in a total of 22 regulated proteins of which the majority were extracellular proteins known to be involved in proper assembly and modulation of the basement membrane in other tissues. Many of the regulated proteins were furthermore among the most abundant proteins quantified. The two MS methods performed here suggest altered arrangement of the extracellular matrix in Fuchs’ endothelial corneal dystrophy and provide new candidate proteins that may be involved in molecular mechanism of this disease.
2014-05-27 | PXD000746 | Pride
Project description:Transcriptome dataset of human corneal endothelium derived from patients with Fuchs endothelial corneal dystrophy
| PRJDB14706 | ENA
Project description:Fuchs endothelial corneal dystrophy (FECD) is a vision impairing pathology affecting the endothelial cells of the cornea. To better understand the disease, we developed a method to cultivate FECD cells isolated from surgical specimens. Using gene profiling, we compared the mRNA profiles of passage 2 FECD cells with passage 2 non-pathological corneal endothelial cells isolated from eye bank donor corneas.
2018-03-20 | GSE112039 | GEO
Project description:A missense mutation of collagen type VIII alpha 2 chain (COL8A2) gene leads to early onset Fuchs’ endothelial corneal dystrophy (FECD), which can cause blindness through progressive loss of corneal endothelial cells. We established a novel procedure for achieving structural and functional rescue of the post-mitotic corneal endothelium without surgery, using CRISPR/Cas9-based postnatal gene editing in a mouse model of FECD. A single intraocular injection of an adenovirus encoding both the Cas9 gene and guide RNA (Ad-Cas9-Col8a2gRNA) at a titer below the cytotoxic threshold, efficiently knocked down COL8A2 protein expression in corneal endothelial cells, prevented endothelial cell loss, and rescued corneal endothelium pumping function in adult Col8a2 mutant mice. Here, to determine the indel rate in mouse corneal endothelium, we performed deep sequencing of PCR products (including the target site) amplified from genomic DNA of corneal endothelium. We found that the indel rate was 23.7 ± 4.5% in mouse corneal endothelium. Most insertions were 1bp insertions (19.8 ± 4.0% in total reads), while 2bp deletions were the most frequent (1.0 ± 0.3% in total reads). We moreover found that A or T insertion was predominant, with the proportion of A:T:G:C being 48.7 : 44.6 : 1.8 : 4.9.
2020-09-01 | GSE146998 | GEO
Project description:This dataset contains proteomic profiles of Descemet's membrane (DM) with corneal endothelial cells derived from patients with Fuchs endothelial corneal dystrophy (FECD) and non-FECD subjects by shotgun proteomics. FECD is the most common inherited corneal disease. Fibrillar focal excrescences, called guttae, and corneal edema due to corneal endothelial cell death result in progressive vision loss. Our dataset indicated that 32 distinctive molecules were expressed only in the FECD-DM but not in the DM of the control subject, possibly having important roles in the pathophysiology of FECD.
2023-01-17 | MSV000091078 | MassIVE
Project description:Transparency of the human cornea is necessary for vision. Fuchs Endothelial Corneal Dystrophy (FECD) is a bilateral, heritable degeneration of the corneal endothelium, and a leading indication for corneal transplantation in developed countries. While the early onset, and rarer, form of FECD has been linked to COL8A2 mutations, the more common, late onset form of FECD has genetic mutations linked to only a minority of cases. Epigenetic modifications that occur in FECD are unkonwn. Here, we report on and compare the DNA methyhlation landscape of normal human corneal endothelial (CE) tissue and CE from FECD patients using the Illumina Infinium HumanMethylation450 (HM450) DNA methylation array. We show that DNA methylation profiles are distinct between control and FECD samples. Differentially methylated probes (10,961) were identified in the FECD samples compared with the control samples, with the majority of probes being hypermethylated in the FECD samples. Genes containing differentially methylated sites were disproportionately annotated to ontological categories involving cytoskeletal organization, ion transport, hematopoetic cell differentiation, and cellular metabolism. Our results suggest that altered DNA methylation patterns may contribute to loss of corneal transparency in FECD through a global accumulation of sporadic DNA methylation changes in genes critical to basic CE biological processes Methylation of DNA is a key epigenetic mark that occurs in aging tissues. Altered DNA methlyation patterns have been observed in several late onset, and progressive ocular diseases including macular degeneration, glaucoma, and cataracts. While DNA methylation changes also occur in the common, late onset corneal dystrophy, FECD, has not been previously studied. Fuchs Endothelial Corneal Dystrophy (FECD) is a bilateral, heritable degeneration of the corneal endothelium, and a leading indicatioin for corneal transplantation in developed countries. Our study examined and compared the genome-scale DNA methylation profiels of corneal endothelial tissue from normal control and FECD patients using the Illumina Infinium HumanMethylation450 (HM450) DNA methylation array. We show that DNA methylation profiles are distinct between control and FECD samples. Differentially methylated probes (10,961) were identified in the FECD samples compared with the control samples, with the majority of probes being hypermethylated in the FECD samples. Genes containing differentially methylated sites were disproportionately annotated to ontological categories involving cytoskeletal organization, ion transport, hematopoetic cell differentiation, and cellular metabolism. Our findings suggest that alterations in DNA methylation may contribute to FECD pathogenesis by modifying the expression of genes with critical biological roles in the corneal endothelium. Our study has important clinical implications as FECD is a leading indication for corneal transplantationin the geriatric population. The effective medical treatment of FECD is a major unmet clinical challenge. Our findings suggest altered DNA methylation as a novel candidate therapeutic target in FECD
2017-02-04 | GSE94462 | GEO
Project description:A missense mutation of collagen type VIII alpha 2 chain (COL8A2) gene leads to early onset Fuchs’ endothelial corneal dystrophy (FECD), which can cause blindness through progressive loss of corneal endothelial cells. We established a novel procedure for achieving structural and functional rescue of the post-mitotic corneal endothelium without surgery, using CRISPR/Cas9-based postnatal gene editing in a mouse model of FECD. A single intraocular injection of an adenovirus encoding both the Cas9 gene and guide RNA (Ad-Cas9-Col8a2gRNA) at a titer below the cytotoxic threshold, efficiently knocked down COL8A2 protein expression in corneal endothelial cells, prevented endothelial cell loss, and rescued corneal endothelium pumping function in adult Col8a2 mutant mice. Here, we evaluated the off-target activity of humanized gRNA targeting COL8A2 gene by a modified digenome analysis (Nat Methods 12, 237-243). Briefly, in vitro SpCas9 digested genomic DNA with/without gRNA are compared by deep sequencing. The target sequence is CGTCCACGGACGCCATGCT. In this study, we identified 13 candidate sites with homology to the gRNA and 8 candidate sites without homology to the gRNA.
2020-09-01 | GSE146997 | GEO
Project description:PURPOSE: To compare the gene expression profiles of normal human corneal endothelium with Fuchs' corneal endothelium, by using serial analysis of gene expression (SAGE). METHODS: Three pairs of normal human corneas were obtained from eye banks. Thirteen bisected Fuchs' corneal buttons were processed at the time of corneal transplantation. The endothelia of normal and Fuchs'-affected corneas were stripped, and total RNA was isolated. Serial analysis of gene expression (SAGE) was performed to identify and quantify gene transcripts. Genes over- and underexpressed by Fuchs' endothelium were limited to P < 0.01 by the method of Audic and Claverie. RESULTS: A total of 19,136 tags were identified with 9,530 from normal and 9,606 from Fuchs' endothelium. The expression of 18 transcripts was upregulated, and 36 transcripts were downregulated in Fuchs' endothelium compared with normal tissue. Upregulated transcripts included serum amyloid A1 and A2, metallothionein, and apolipoprotein D. Of the downregulated transcripts, 26 matched known genes, 3 matched expressed sequence tags (ESTs), and 7 were unknown to current databases. One downregulated transcript involved a newly reported bicarbonate transporter. Decreased transcripts related to antioxidants and proteins conferring protection against toxic stress were noted in Fuchs' versus normal endothelium including nuclear ferritin, glutathione S-transferase-pi, and heat shock 70-kDa protein. Nine different SAGE tags matching mitochondrial sequences accounted for 25% of the ESTs that were decreased in Fuchs' endothelium. CONCLUSIONS: SAGE analysis comparing normal to Fuchs' endothelium demonstrates diminished expression of mitochondrial, pump function, and antiapoptotic cell defense genes. A complete report of gene expression profiles of normal human corneal endothelium can be found in PMID 12583793. Keywords: other
2003-07-16 | GSE505 | GEO