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6 results for “untargeted analysis”
Untargeted metabolomics analysis of RPE cells during six month in culture
<p>Primary RPE cell cultures were established with human fetal RPE cells acquired from ScienCell (Cat. No, 6540) seeded at passage 3 (P3) in 12-well Transwell<sup>®</sup> inserts (Corning Inc., Cat. No. CLSS3460) coated with 2% v/v Geltrex<sup>®</sup> matrix (Thermo Fisher Scientific; Cat. No. A1413202). Cells were cultured for a total time of 6 months (25 weeks), following the same protocol as previous works (16,59). Samples were acquired for protein immunolocalization, transcriptomic and metabolomics analysis from independent cell cultures along the total 6 months culture time (specifically at 4, 12, 17 and 25 weeks in culture), collecting 3 biological replicates per type of analysis and time point.<em> </em>Cell metabolites were quenched and extracted using MeOH:H<sub>2</sub>O (80:20, -20ºC) containing a spiked solution of isotopically enriched low molecular mass internal standard<strong>. </strong>Quality control (QC) samples were prepared by creating a pool of equal volumes from each biological replicate and were analyzed after a blank solution every fifth sample to monitor the performance, stability, and reproducibility of the LC-MS run. A liquid chromatography (LC) system 1290 Infinity II (Agilent Technologies) was coupled to an Agilent 6560B Ion Mobility quadrupole-time-of-flight mass spectrometer (IM-QTOF-MS) equipped with an Agilent G1607A dual jetstream ESI source and the MassHunter WorkSation 11.0. A reference solution containing purine and hexakis(1H,1H,3H-tetrafluoropropoxy)phosphazene for mass correction was added using the second ESI source. Chromatographic, ion source and MS conditions were optimized using QCs and selected parameters are shown in Supporting Information. MS analysis was conducted with an untargeted approach, operating the instrument in both positive and negative ionization modes. All samples were analysed in a randomized order. Raw data was processed using the software Profinder B10.00 (Agilent) and refined data were exported as CEF files<strong>. </strong>Data were converted to mzml files using MS convert.</p>
TBT exposure dataset of the manuscript "Assessment of endocrine disruptors effects on zebrafish (Danio rerio) embryos by untargeted LC-HRMS metabolomic analysis"
<p><strong>Raw LC-HRMS data of the TBT exposure of zebrafish embryos (for more details see https://doi.org/10.1016/j.scitotenv.2018.03.369)</strong></p> <p>The exposure protocol involved zebrafish embryos exposed in groups of 20 to various concentrations of chemical compounds, with five replicates per treatment. The concentrations ranged from the lowest observed effect concentrations (LOECs) to control levels. After exposure, embryos were collected, washed, frozen, and stored. Metabolites were extracted from individual embryo pools using methanol and methionine sulfone. The extraction process included vortexing, sonication, and centrifugation, followed by addition of water and chloroform. The aqueous fraction was dried and reconstituted using acetonitrile-water solution. Liquid chromatography coupled with high-resolution mass spectrometry (LC-HRMS) was used for analysis. Chromatographic separations were carried out on a hydrophilic interaction liquid chromatography (HILIC) column. Mass spectrometry was performed using an Orbitrap mass spectrometer with electrospray ionization in positive and negative modes. The mass spectra were acquired at high resolution, and fragmentation scans were used for metabolite identification. The overall process aimed to analyze the metabolomic profile of zebrafish embryos exposed to different chemical concentrations.</p> <p><strong>Data files</strong></p> <blockquote> <p>TBT ESI+ (tbt_pos.rar) - CDF files</p> <p>- QC (4 replicates)</p> <p>- Control (5 replicates)</p> <p>- TBT 3 nM (5 replicates)</p> <p>- TBT 10 nM (5 replicates)</p> <p>- TBT 30 nM (5 replicates)</p> <p>- TBT 100 nM (5 replicates)</p> </blockquote> <p> </p> <blockquote> <p>TBT ESI- (tbt_neg.rar) - CDF files</p> <p>- QC (6 replicates)</p> <p>- Control (5 replicates)</p> <p>- TBT 3 nM (5 replicates)</p> <p>- TBT 10 nM (5 replicates)</p> <p>- TBT 30 nM (5 replicates)</p> <p>- TBT 100 nM (5 replicates)</p> </blockquote>
Untargeted metabolomic analysis of thyroid cancer and benign thyroid nodule
<p>Thyroid cancer (TC) is the most common endocrine malignancy with increasing incidence in recent years. Fine-needle aspiration biopsy (FNAB), as a quick and cost-effective method, serves as a gold standard for initial evaluation of thyroid nodules. However, this technique fails to cover all the cytopathologic conditions resulting in a high rate of indeterminate results. There is an urgent need for better classification of thyroid cancer from benign thyroid nodule (BTN). Here, we conducted untargeted metabolomics in 25 plasma samples from 10 patients with TC and 15 patients with BTN.</p>
Fig. 8. Untargeted metabolomic analysis A in Multivariate analysis of chemical and genetic diversity of wild Humulus lupulus L. (hop) collected in situ in northern France
Fig. 8. Untargeted metabolomic analysis A. Principle component analysis of the 63 chemotypes of hop studied. Each symbol represents a single plant from the different accessions. Commercial varieties (10 accessions), heirloom varieties (3 accessions), wild hops collected on different locations (50 accessions, Fig. 3). B. Principle component analysis of the chemical markers.
DSM41230 extract untargeted analysis
<p>Data dependent analysis of strain DSM31230 extracts in positive mode</p>
Untargeted and targeted transcriptome analysis to decipher the impact of exogenous fatty acids in cold stress adaptation of Listeria monocytogenes
GEO Series GSE268246. Listeria monocytogenes. 12 samples. Type: Expression profiling by high throughput sequencing.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.