Human Ocular Surface Metagenome
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA1314235 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:Ocular surface microbiome in dupilumab associated ocular surface disease
| PRJEB57775 | ENA
Project description:The glycocalyx is a critical but often underappreciated modulator of cellular behavior. Its diversity across cell types within tissues remains poorly understood, but recent advances in single-cell profiling now enable more precise analysis of cell surface composition. Here, we applied single-cell glycan and RNA sequencing to profile glycocalyx diversity across human and mouse ocular surface cell types. Glycocalyx patterns effectively distinguished epithelial subtypes, with corneal epithelial cells enriched in complex and high-mannose N-glycans, conjunctival cells in fucosylated structures, and goblet cells in O-glycans. We also observed dynamic changes during epithelial maturation, marked by regulated shifts in sialic acid structures. In the mouse ocular surface, glycocalyx patterns distinguished major cell types, but the glycan profiles differed from those in humans, pointing to species-specific features. These findings demonstrate that glycocalyx composition is closely linked to cell identity and maturation and provide a foundation for exploring its roles in tissue organization and disease.
2025-11-18 | GSE299152 | GEO
Project description:The major focus of Dr. Argueso's research is to characterize the carbohydrate portion of the different mucins expressed by the ocular surface epithelia as well as the enzymes involved with their synthesis, and to determine whether the alteration of mucin glycosylation is associated with ocular surface disease. Highly glycosylated mucins on the ocular surface (cornea and conjunctiva) are the first line of defense of the eye against injury and infection. Changes in O-glycosylation of mucins may cause ocular surface disorders, such as dry eye. Gene expression patterns in the conjunctival epithelium of three normal subjects were analyzed. The three subjects have the same ABO-blood-group. For each donor, conjunctival cells were obtained by impression cytology. Conjunctival impression cytology was performed on each eye two times with a one-week interval. Conjunctival cells obtained from each individual were pooled and the RNA isolated. All three samples were hybridized to the custom designed CFG GLYCOv2 glycogene array.
2011-03-02 | E-GEOD-27593 | biostudies-arrayexpress
Project description:The major focus of Dr. Argueso's research is to characterize the carbohydrate portion of the different mucins expressed by the ocular surface epithelia as well as the enzymes involved with their synthesis, and to determine whether the alteration of mucin glycosylation is associated with ocular surface disease.
2011-03-02 | GSE27593 | GEO
Project description:Mass spectrometry-based proteomics by bottom-up approaches enables the unbiased and sensitive profiling of cellular proteomes and extracellular environments. Recent technological and bioinformatic advances permit identifying of dual biological systems in a single experiment, supporting investigation of infection from the perspective of both a host and pathogen. At the ocular surface, P. aeruginosa are commonly associated with biofilm formation and inflammation of the ocular tissues, causing damage to the eye. The interaction between P. aeruginosa and the immune system at the site of infection describes limitations in clearance of infection and enhanced pathogenesis. Here, we profile the extracellular environment (eye wash) of murine ocular surfaces infected with a clinical isolate of P. aeruginosa and detect neutrophil marker proteins, indicating neutrophil recruitment to the site of infection. In addition, we define the deepest murine corneal proteome to date and detect proteins, categories, and networks critical to the host response to infection. Moreover, we provide the first identification of bacterial-specific proteins in response to the host during bacterial biofilm formation of the eye. We validate our findings through in silico comparisons and enzymatic profiling. Overall, our work provides comprehensive profiling of the host-pathogen interface and uncovers differences between general and site-specific host responses to infection.
2020-01-09 | PXD015362 | Pride
Project description:Recently we had discovered a solid cord like structure at the limbus of human eyes, termed as the Limbal Epithelial Crypt (LEC). It arises from the undersurface of the interpalisade rete ridges and extends towards the conjunctiva over the conjunctival stroma. Anatomical and immunohistochemical studies have shown it to be potentially a Stem Cell Niche. To confirm this hypothesis we conducted comparative gene expression profile of LEC with pathway and Geneontology studies in comparison with other ocular surface epithelial regions such as cornea, limbus, LEC stroma and conjunctiva. Frozen tissue blocks of corneoscleral buttons dissected from cadaver eyes were cryosectioned. These tissue sections from different ocular surface regions were laser microdissected. Extracted RNA was amplified & hybridized to 30,000k Human spotted cDNA microarray chips. Raw data obtained with Genepix Pro6 software was filtered, normalized & analysed on BASE & Jexpresspro software. Unpaired T-Test, Significance Analysis of Microarrays were performed on the data. Database for Annotation, Visualisation, and Integrated Discovery (DAVID) (http://www.DAVID.niaid.nih.gov) and Ingenuity Pathway Analysis (IPA) was used to determine the enriched GO terms and pathways in the differentially expressed genes. Quantitative gene expression analysis (qPCR) and immunohistochemistry was performed on the genes of interest. Statistical analysis for real time PCR was performed on SPSS16 to determine the normalised expression of gene of interest on ocular surface regions. Samples were prepared from five human ocular surface epithelial regions such as Cornea, Limbus, LEC, LEC Stroma, Conjunctiva. There were four replicates in each groups except Cornea and Conjunctiva with 3 each. The Standard Probe (SP) was prepared from mixing equal amount of Corneal and conjunctival epithelial RNA followed by ethanol precipitation. Samples were labelled with Cy5 dye and Standard Probe with Cy3 Dye. These were mixed in equal amount to prepare hybrid probes which were then hybridised to microarray slide.
2010-03-23 | E-GEOD-19035 | biostudies-arrayexpress
Project description:Herpes simplex virus-1 (HSV-1) is the major pathogen causing viral keratitis. Spleen plays a vital role in locally and systemically modulating innate and adaptive immunity. However, the underlying connection between spleen and ocular HSV-1 infection remains uncertain.
2025-12-31 | GSE282612 | GEO
Project description:The influence of contact lenses on the ocular surface microbiome
| PRJEB97939 | ENA
Project description:Pseudomonas aeruginosa-induced corneal keratitis is a sight-threatening disease. The elevated rise of antibiotic resistance among the Pseudomonas keratitis isolates makes treatment of this disease challenging, justifying the need for alternative therapeutic modalities or treatment strategies that can reinforce antibiotic activities. By comparing the responses of P. aeruginosa infection on an outbred strain of mice (SW) to a susceptible strain of mice (C57BL6/N), we found that the neutrophil killing abilities of these strains segregate with their susceptibilities to infection. Namely, SW-derived neutrophils were significantly more efficient at killing P. aeruginosa in vitro than C57BL6/N-derived neutrophils. Quantitative LC-MS/MS analysis revealed significant differences in proteins with enzymatic activities such as alpha mannosidases. Given that during infection, P. aeruginosa forms mannose-rich biofilms at the ocular surface in the susceptible strain of mice, we compared the therapeutic potency of MoAb, recognizing the mannose-rich extracellular polysaccharide, psl, to that of alpha mannosidase. The topical application of alpha mannosidase reduced in vitro-formed biofilms by P. aeruginosa and consistently reduced the bacterial burden of the infected corneas. Cumulatively, these data illustrate that topical application of enzymes can control bacterial biofilm assembly and improve bacterial clearance.
2019-05-15 | PXD009767 | Pride