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Gene expression of the human trabecular meshwork (TM) of the eye

ABSTRACT: We investigated the gene expression of the human TM. We isolated TM cells from healthy human donor eyes. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays.

ORGANISM(S): Homo sapiens

PROVIDER: GSE50784 | GEO | 2013/09/12

SECONDARY ACCESSION(S): PRJNA218884

REPOSITORIES: GEO

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Gene expression of the human trabecular meshwork (TM) of the eye

Project description:We investigated the gene expression of the human TM. We isolated TM cells from healthy human donor eyes. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays. We performed the microarrays against a common reference sample, namely human RPE/choroid RNA. We performed 2 replicates of human TM samples from 2 different donors.

2013-09-12 | E-GEOD-50784 | biostudies-arrayexpress

Global expression analysis of the trabecular meshwork, cornea, sclera and trabecular meshwork-derived mesenchymal stem cells (TM-MSC)

Project description:Microarray study comparing the trabecular meshwork (TM) with TM-MSC, corneal and scleral tissues

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Comparison of extracellular vesicle proteome between glaucoma and non-glaucoma trabecular meshwork cells

Project description:Extracellular matrix (ECM) materials accumulate in the trabecular meshwork (TM) tissue of patients with glaucoma, which is associated with a decrease in aqueous humor outflow and therefore an increase in intraocular pressure. To explore a potential mechanism for ECM regulation in the TM, we purified extracellular vesicles (EVs) from conditioned media of differentiated TM cells in culture isolated from non-glaucomatous and glaucomatous human donor eyes. EVs were purified using the double cushion ultracentrifugation gradient method. Fractions containing EV markers CD9 and TSG101 were analyzed using nanoparticle tracking analysis to determine their size and concentration. We then determined their proteomic cargo by mass spectrometry and compared protein profiles of EVs between normal and glaucomatous TM cells using PANTHER. Key protein components from EV preparations were validated with Western blotting. Results showed changes in the percentage of ECM proteins associated with EVs from glaucomatous TM cells compared to non-glaucomatous TM cells (5.7% vs 13.1% respectively). Correspondingly, we found that two ECM-related cargo proteins found across all samples, fibronection and EDIL3 were significantly less abundant in glaucomatous EVs (<0.3 fold change across all groups) compared to non-glaucomatous EVs. Overall, these data establish that ECM materials are prominent cargo in EVs from TM cells, and their binding to EVs is diminished in glaucoma

2024-01-26 | PXD044913 | Pride

Expression Profile of Genes in Trabecular Meshwork Cells Treated with Dexamethasone

Project description:Treatment with glucocorticoids is known to cause ocular hypertension in humans which can lead to steriod-induced glaucoma We used microarrays to determine changes in gene expression in two human trabecular meshwork (TM) cell isolates (TM-4 and TM-2) from the same donor that could explain the increase in ocular hypertension.

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Gene expression of the pigmented and non-pigmented epithelia of the ciliary body of human healthy eyes

Project description:The ciliary body (CB) of the human eye consists of the non-pigmented (NPE) and pigmented (PE) neuro-epithelia. We investigated the gene expression of the NPE and PE, to shed light on the molecular mechanisms underlying the most important functions of the CB. Therefore we isolated NPE and PE cells from seven healthy human donor eyes using laser dissection microscopy. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays.

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Genome-wide DNA methylation in cultured human Schelmm's Canal endothelial cells and trabecular meshwork cells with or without glaucoma

Project description:Genome-wide DNA methylation profiling in cultured human Schelmm's Canal endothelial cells (SC) and trabecular meshwork (TM) cells derived from post-mortem eyes with or without glaucoma. Our study aimed to identify glaucoma-associated genes that were affected by DNA methylation.

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Dexamethasone induced gene expression changes in the human trabecular meshwork

Project description:One of the undesirable side effects of glucocorticoid use is the potential development of elevated intraocular pressure and glaucoma. The precise mechanisms through which steroid use induces ocular hypertension are unclear. The purpose of this study was to identify gene expression changes induced by steroids in the human trabecular meshwork and the underlying sclerocorneal tissue. The anterior segment of five pairs of adult human donor eyes were maintained in a profusion organ culture system.

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Gene expression of the human choroid plexus epithelium (CPE)

Project description:We investigated the gene expression of the human CPE.We isolated CPE cells from healthy human donor choroid plexus tissues with laser dissection microscopy. Next, we performed RNA isolation, amplification, labeling and hybridization against 44k Agilent microarrays.

2013-09-27 | GSE49969 | GEO

Transcription profiling of human trabecular meshwork cells after TGF-beta1 and 2 treatment

Project description:TGF-beta levels are known to increase in the aqueous humor of eye cells in patients with glaucoma. Increase TGF-beta is assumed to have a biochemical impact on the trabecular meshwork, and an increase in extracellular matrix formation, which may be responsible for decrease outflow facility of the eye. This may increase extracellular pressure, causing glaucoma. TGF-beta 1 may be the cause of abnormal accumulation of extracellular matrices in trabecular meshwork of eyes with primary open angle glaucoma. Transforming growth factor (TGF)-beta2 regulates the expression of proteoglycans in aqueous humor from human glaucomatous eyes. To identify gene expression changes as a result of TGF-beta1 and 2 treatment of human trabecular meshwork cells. We expect to see a change in expression of the proteoglycans in HTM cells as a response to TGF-beta treatment. Human Trabecular Meswork cells in the eye were bathed by aqueous humor. TM cells were removed from individuals with the following ages: 16,66,67,73, and 76. Each individual was treated with EtOH (control), TGF-beta1, or TGF-beta2. Total RNA from each individual was pooled for each chip. Technical replicates were created for each treatment type, for a total of 6 chips.

2008-06-15 | E-GEOD-7144 | biostudies-arrayexpress

Trabecular meshwork cell-derived exosomal microRNA expression

Project description:Trabecular meshwork cells in eyes with glaucoma aquire mesenchymal phenotypes. The types of microRNAs in exosomes may differ between static and glaucomatous status and their effects on aqueous humor regulation are still uknown. We used microarrays to identify the differential microRNA expression related to interaction between trabecular meshwork cells and Schlemm's canal endothelial cells.

2021-11-17 | GSE175464 | GEO

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