C4d1ee5d-c41f-4556-9065-02cb142fd5d4 - samples
Ontology highlight
ABSTRACT:
PROVIDER: EGAD00001011317 | EGA |
REPOSITORIES: EGA
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Project description:Total RNA sequencing of olfactory mucosa (OM) cells derived from cognitively healthy individuals exposed to traffic-related ultrafine particles (UFPs) for 24h and 72h in submerged cultures. The UFPs used for exposures were: A0, A20 and Euro6. Exposures were compared to the corresponding blank samples.
| EGAS00001007528 | EGA
Project description:The aim of this study was to use global gene expression profiling to define intrinsic molecular differences that distinguish olfactory ensheathing cells from mucosa (OM-OECs) from olfactory ensheathing cells from olfactory bulb (OB-OECs). 10,000 OECs from olfactory mucosa (OM) or olfactory bulb (OB) were isolated from 4 rats.
2009-12-02 | GSE19250 | GEO
Project description:The olfactory mucosa (OM) has the unique characteristic of pursuing almost continuous neurogeneration during adulthood in response to external injuries to maintain olfactory function due to the presence of stem cells. The easily accessibility of the OM in humans is a feature that makes these stem cells relevant candidates for the development of regenerative therapies. In this report we present an in depth characterization of patient derived OM together with the characterization of their respective OM derived cultures. In addition, we present a method for the enrichment and isolation of OM stem cells that can be used for future translational sought studies regarding plasticity, neuro-regeneration or disease modeling.
2017-03-17 | GSE96737 | GEO
Project description:In this work, we demonstrate that neonatal mice infected with ZIKV via intracranial injection suffers from transient olfactory dysfunction when they grow up to puberty. Moreover, ZIKV exhibits broad cellular tropism and mainly targets the olfactory ensheathing cells (OECs) in the olfactory mucosa (OM) of mice. To decipher the underlying mechanism of the observed olfactory dysfunction in ZIKV infected mice at the molecular level, RNA-Seq analyses of the OM and OB samples from ZIKV infected mice were performed in comparison with that from the control animals.
2022-10-03 | GSE214567 | GEO
Project description:To gain a global view of the effect of systematic glucocorticoid treatment on gene expression in the olfactory mucosa (OM), we profiled these changes in a murine model of olfaction in order to identify underlying molecular mechanisms.
2015-05-31 | GSE68151 | GEO
Project description:A convergence of technological breakthroughs in the past decade has facilitated the development of rapid screening tools for biomarkers of toxicant exposure and effect. Platforms using the whole adult organism to evaluate the genome-wide response to toxicants are especially attractive. Recent work demonstrates the feasibility of this approach in vertebrates using the experimentally robust zebrafish model. In the present study, we evaluated gene expression changes in whole adult zebrafish following an acute 24 hour exposure to three metals with known human health risks. Male adult zebrafish were exposed to nickel chloride, cobalt chloride, and sodium dichromate concentrations corresponding to their respective 96 hr LC20, LC40 and LC60. Histopathology was performed on a subset of metal-exposed zebrafish to phenotypically anchor transcriptional changes associated with each metal. Comparative analysis identified subsets of differentially expressed transcripts both overlapping and unique to each metal. Application of gene ontology (GO) and transcription factor enrichment algorithms revealed a number of key biological processes perturbed by metal exposures and the master transcriptional regulators mediating gene expression changes. Metal exposures differentially activated biological processes associated with ribosome biogenesis, proteosomal degradation and p53 signaling cascades, while repressing oxygen-generating pathways associated with amino acid and lipid metabolism. Despite appreciable effects on gene regulation, nickel exposures did not induce any morphological alterations in zebrafish organs and tissues. Histopathological effects of cobalt remained confined to the olfactory system, while chromium targeted the gills, pharynx and intestinal mucosa. A number of enriched transcription factors mediate the observed gene response to metal exposure, including known targets such as p53, HIF1M-oM-^AM-! and the myc oncogene and novel regulatory factors such as XBP1, GATA6 and HNF3M-oM-^AM-". This work uses an experimentally innovative approach to capture global responses to metal exposures and provides mechanistic insights into metal toxicity mechanisms. Metal induced changes in gene expression in zebrafish were measured after 24 h exposures to each of three metals (nickel, chromium or cobalt). A total of 48 arrays were processed - 16 arrays per metal with 4 replicates for each exposure condition (control, low, mid, and high).
2014-06-10 | E-GEOD-50648 | biostudies-arrayexpress
Project description:In order to improve our knowledge of olfactory ensheathing cells of the olfactory mucosa, we performed a wide microarray experiment to characterize the cell subpopulations found in primary olfactory mucosa cell cultures (CD90, P75 and TRKA cells). The consequences of the conditionning of TRKA cells by FBS deprivation and TGF-a supplementation was also studied.
2019-12-01 | GSE91017 | GEO
Project description:The Coronavirus Disease 2019 (COVID-19) is mainly a respiratory syndrome that can affect multiple organ systems, causing a variety of symptoms. Among the most common and characteristic symptoms are deficits in smell and taste perception, which may last for weeks/months after COVID-19 diagnosis owing to mechanisms that are not fully elucidated. In order to identify the determinants of olfactory symptom persistence, we obtained olfactory mucosa (OM) from 21 subjects, grouped according to clinical criteria: i) with persistent olfactory symptoms; ii) with transient olfactory symptoms; iii) without olfactory symptoms; and iv) non-COVID-19 controls. Cells from the olfactory mucosa were harvested for transcriptome analyses. RNA-Seq assays showed that gene expression levels are altered for a long time after infection. The expression profile of micro RNAs appeared significantly altered after infection, but no relationship with olfactory symptoms was found. On the other hand, patients with persistent olfactory deficits displayed increased levels of expression of genes involved in the inflammatory response and zinc homeostasis, suggesting an association with persistent or transient olfactory deficits in individuals who experienced SARS-CoV-2 infection.
2023-07-11 | GSE209806 | GEO
Project description:RNA-seq for MSCs from human bone marrow (BM-MSCs), olfactory mucosa (OM-MSCs), and umbilical cord (UC-MSCs) (2 donors for each). RNA-sequencing for human naïve CD3+ T cells, CD3+ T cells activated with PHA (2.5 μg/mL) for 48 h， and CD3+ T cells co-cultured with human UC-MSCs in the presence of PHA for 48 h.
2021-02-09 | GSE166327 | GEO
Project description:Background: The olfactory epithelium (OE) is one of the few sites where environmental pathogens can gain direct access to the brain. Despite this vulnerable arrangement, little is known about the protective mechanisms in the OE to prevent viral infection and subsequent entry into the brain. Methods: We systematically investigated acute responses in the olfactory mucosa (OM) upon exposure to vesicular stomatitis virus (VSV) by RNA-seq. VSVs were nasally inoculated into C57BL/6 mice. OM were dissected for gene expression analysis at different time points after viral inoculation. Interferon functions were determined by comparing viral gene expression in interferon (Ifn) receptor knockout (Ifnar1-/- and Ifnlr1-/-) with wildtype OM. Results: Antiviral responses were observed as early as 24hrs post viral exposure in the OM. Amongst the rapidly upregulated transcripts observed were specific type I as well as type III Ifns and interferon stimulated genes. Genetic analyses demonstrated that both type I and type III IFN signaling are required for the suppression of viral replication in the OM. Nasal IFNb1 or IFNl2 administration effectively reduces viral load in the OM. Conclusions: OE possesses innate ability to respond and suppress viral infection. Type I and type III IFNs actively participate in the OE’s antiviral functions. Nasal IFN application effectively blocks viral replication in the OE suggesting therapeutic potential against viral insult.
2023-07-03 | GSE154235 | GEO