NanoSring of PBMC from bladder cancer and RCC patients
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PROVIDER: EGAS00001004229 | EGA |
REPOSITORIES: EGA
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Project description:Purpose: Nxf1 is thought to be an essential nuclear exporter of messenger RNA (mRNA) in eukaryotic cells. Whether perturbations in the Nxf1 pathway affect mammalian physiology is not known. The aim of this study is to determine the impact of a Nxf1 mutation in the representation of mRNA transcripts in erythrocytes. Methods: Red blood cells were obtained from cardiac puncture, mixed with 100µl Aster Jandl citrate-based anticoagulant and subsequently diluted in 2 ml of phosphate buffer saline (PBS) with 2mM EDTA. This suspension was layered with 1.5 ml Ficoll-paque PLUS (GE Healthcare) and centrifuged at 400g for 30 minutes at room temperature with minimal acceleration and brake. The red blood cell containing pellet was washed twice with PBS 2mM EDTA and lysed for RNA extraction. The purity of each sample was checked by flow cytometry to assess the relative contamination of Ter199+ red blood cells with CD41+ platelets, CD45+ lymphocytes and DRAQ5+ (Thermo Fisher Scientific) nucleated cells. Red blood cell suspensions used for RNAseq were > 99.8% pure. RNA was extracted with Qiagen RNA extraction kit.
2020-03-04 | GSE141160 | GEO
Project description:Each colony of A. hydrophila and the OXY-R strain were incubated in 5 mL LB medium overnight, and then diluted in 100 mL fresh LB medium at a ratio of 1:100 and subsequently cultured until the optical density at 600 nm (OD600) reached 1.0. The cultures were harvested via centrifuging for 20 min at 10,000 x g, 4°C, and then the bacterial cells were washed with cold phosphate buffered saline (PBS, pH 7.4) for three times. The cell pellets were resuspending in the 10 mL ultrasonic buffer (50 mM Tris-HCl, pH 7.4, 1 mM PMSF) and disrupted with intermittent sonic oscillation for a total of 30 minutes at 9 seconds intervals on ice. Subsequently, the cell debris and unbroken cells were separated by centrifugation at 8,000 x g for 20 min at 4°C. Then the supernatant was centrifuged at 100,000 x g for 1 h at 4°C in the Optima LE-80 K Ultracentrifuge (Beckman, Palo Alto, CA, USA). After the pellet was dissolved with 2% sodium lauroyl sarcosine (in 50 mM Tris-HCl, pH 7.5) for 40 min at room temperature (RT), the pellets were ultracentrifuged again at 100,000 x g for 1 h at 4°C. Finally, the precipitate was dissolved in an appropriate volume of SDT buffer (4 % SDS, 0.1 M DTT [dithiothreitol], and 0.5 M triethylammonium bicarbonate buffer [TEAB, pH 8.5]). The protein concentration was determined using the Bradford method and then stored at -20°C until subsequent use.The proteins were digested with trypsin after being reduced with DTT and alkylated with Iodoacetamide using a filter-aided sample preparation method (Tanca et al., 2013; Li et al., 2016b). After washing three times with 0.5 M TEAB followed by fractionation using the 10 kDa ultrafiltration system (Millipore, Billerica, MA, USA), about 100 μg digested peptide from each group, including two biological replicates, was taken out for further labeled using TMT isobaric and isotopic mass-tagging kits (Thermo Fisher Scientific, MA, USA), which was performed according to instructions from the kit.
2018-11-23 | PXD009622 | Pride
Project description:Background: Interest in single-cell whole transcriptome analysis is growing rapidly, especially for profiling rare or heterogeneous populations of cells. In almost all reported works, investigators have used live cells which represent several inconveniences and limitations. Some recent cell fixation methods did not work with most primary cells including immune cells. Methods: The methanol-fixation and new processing method was introduced to preserve PBMCs for single-cell RNA sequencing (scRNA-Seq) analysis on 10X Chromium platform. Results: When methanol fixation protocol was broken up into three steps, we found that PBMC RNA was degraded during rehydration with PBS, not at cell fixation and up to three-month storage steps. Resuspension but not rehydration in 3X saline sodium citrate (SSC) buffer instead of PBS preserved PBMC RNA integrity and prevented RNA leakage. Diluted SSC buffer did not interfere with full-length cDNA synthesis. The methanol-fixed PBMCs resuspended in 3X SSC were successfully implemented into 10X Chromium standard scRNA-seq workflows with no elevated low quality cells and cell doublets. The fixation process did not alter the single-cell transcriptional profiles and gene expression levels. Major subpopulations classified by marker genes could be identified in fixed PBMCs at a similar proportion as in live PBMCs. This new fixation processing protocol was validated in CD8+ T cell and several other cell types. Conclusions: We expect that the methanol-based cell fixation procedure presented here will substantially enable complex experimental design with primary cells at single cell resolution.
2018-07-25 | GSE112845 | GEO
Project description:Overnight cultures of S. aureus were diluted to OD600 = 1 and 1 ml of culture was resuspended in 500 μl of either PBS, human plasma, or human serum, and incubated rotating at 37 °C for 30 m. Suspensions were washed 3x with PBS supplemented with 500 40% sucrose and 20 mM Sodium Azide. Cells were incubated with immobilized trypsin (ThermoFisher 20230), suspended in PBS supplemented with 500 40% sucrose and 20 mM Sodium Azide, at 37 °C for 2 h. cells were pelleted, and the supernatant containing protein fragments was analyzed by mass spectrometry to determine proteins.
2023-04-14 | PXD038927 | Pride
Project description:Preparation of AMDs. 125 μM Ac4ManNAz were incubated with Raw 264.7 (~ 107 cells/dish) for 24, 48, and 72 h, followed by gentle washing with PBS or complete medium to produce Raw 264.7-Ac4ManNAz. Subsequently, Raw 264.7-Ac4ManNAz (~ 107 cells) were resuspended in PBS containing Alkynyl-Ce6(0.1 μM), ascorbic acid (0.2 μM) and CuSO4 (0.2 μM) and incubated for 1h at 37 °C. Then centrifuged (1000 rpm, 3 min) and washed 3 times with PBS to obtain precursor of AMDs. precursor of AMDs (~ 107 cells/tube, 1.0 ml) was immersed in liquid nitrogen, 24 h later, the frozen tubes were thawed at 37°C, centrifuged at 1500 rpm for 3 min, washed and resuspended by PBS to generate the AMDs (5 x 106 units/tube, 1.0 ml).
2024-03-21 | PXD050063 | Pride
Project description:Cortical rat neuronal culture, lysis and proteolytic digestion Primary rat cortical neurons were generated from E18 Sprague-Dawley rat embryos with minor modifications (Swanger, Mattheyses et al. 2015, Henderson, Greathouse et al. 2019). Neurons were cultured at a density of 4x105 cells per well in 12-well culture plates (Fisher Scientific, catalog no. 353043). Neurons were cultured in Neurobasal medium (Fisher Scientific, catalog no. 21103-049) supplemented with B27 (Fisher Scientific, catalog no.17504-044). Culture maintenance included a half media change every 2-3 days. At DIV 14, neurons were either treated with 150 ng/mL recombinant NRN1 protein (Abcam, ab69755) or vehicle treated with diH2O for 6 hours. NRN1 concentration was chosen based on published data that identified a plateau in exogenous NRN1 induced effects on transient potassium currents at 150 ng/mL (Yao et al., 2012). After 6 hours neurons were washed 2x with 1 mL 1X phosphate-buffered saline (PBS). To harvest cells, 1 mL 1X PBS + protease inhibitor (Fisher Scientific, catalog no. 78426) was added and cells were centrifuged for 2300rpm for 5 minutes at 4°C. Cell pellets were lysed in 200uL 8M urea buffer and HALT protease and phosphatase inhibitor cocktail (1x final concentration). Lysates were sonicated with a probe sonicator 3 times for 10 s with 10 s intervals at 30% amplitude and cleared of cellular debris by centrifugation in a tabletop centrifuge at 18,000 rcf for 3 minutes at 4° C. Protein concentration was determined by BCA assay and one-dimensional SDS-PAGE gels were run followed by Coomassie blue staining as quality control for protein integrity and equal loading before proceeding to protein digestion. Protein homogenates (50 µg) were diluted with 50 mM NH4HCO3 to a final concentration of less than 2 M urea and then treated with 1 mM dithiothreitol (DTT) at 25°C for 30 minutes, followed by 5 mM iodoacetimide (IAA) at 25°C for 30 minutes in the dark. Protein was digested with 1:100 (w/w) lysyl endopeptidase (Wako) at 25°C for 2 hours and further digested overnight with 1:50 (w/w) trypsin (Pierce) at 25°C. Resulting peptides were desalted with a Sep-Pak C18 column (Waters) and dried under vacuum.
2023-07-20 | PXD040867 | Pride
Project description:Analysis of expression quantitative trait loci (eQTLs) using RNA derived from freshly harvested peripheral blood CD4+ lymphocytes from 200 asthmatics collected in clinical settings. RNA was obtained from peripheral blood CD4+ lymphocytes at four study centers. Peripheral blood (17 cc) was collected into BD Vacutainer CPT tubes (BD Diagnostics, Franklin Lakes, New Jersey) and placed on ice. Samples were centrifuged within 1 hour of collection for 20 minutes at 1700RCF, followed by mononuclear cell layer isolation and suspension in 10 ml of PBS. We isolated CD4+ lymphocytes using anti-CD4+ microbeads by column separation (Miltenyi Biotec, Auburn, CA) using 20 µl anti-CD4+ Micro beads per 106 total cells
2010-06-23 | E-GEOD-22324 | biostudies-arrayexpress
Project description:293T (Human embryonic kidney cells-ATCC CRL-3216) cells were plated at 500,000 cells per 10 cm dish and grown for 48 hours. Cells were then transfected with GFP-MAGEC1 WT or GFP-MAGEC1 L318D in a 3:1 ratio of PEI (polyethylenimine) to DNA. Cells were harvested after 48 hours and lysed in 50 mM Tris pH 7.5, 150 mM NaCl, 1% Triton X-100, protease inhibitor (cOmplete™, Mini, EDTA-free (Roche)). Cells were incubated for 25 minutes on ice and then sonicated for 5 minutes at 4°C. Cells were centrifuged at 14,000 rpm for 20 minutes at 4 °C. 500 ug lysate was then added to GFP-Trap® Agarose resin (ChromoTek) and samples were incubated rotating at 4°C for 2 hours. Following washing of the beads with 50 mM Tris pH 7.5, 150 mM NaCl, proteins were eluted by the addition of 2x Laemmli buffer and boiled for 10 minutes at 95 °C. Samples were spun down and the supernatants were sent for mass spectrometry analysis as described below. Experiments were conducted in triplicate.
2024-02-20 | PXD047849 | Pride
Project description:Patients received standardized coartem therapy. Briefly, each pill contains 20 mg of artemether and 120 mg of lumefantrine. The dose and total coarse of tablets is based on the patients body weight. Blood was drawn from patients prior to anti-malarial treatment (day 0) and after treatment (day42 for children and day 28 for adults). Peripheral Blood Mononuclear Cells were isolated from all patients. Briefly, for PBMC isolation, whole blood from was diluted 1:2 in sterile PBS and overlaid on Ficoll Paque-PLUS in 50 mL conical tubes and centrifuged 800xg for 15 minutes at 25°C with no brake. Resulting buffy coats were collected and washed twice in RPMI 1640 medium, and then cells were treated with Red Blood Cell Lysis Buffer for 3 minutes at room temperature. Cells were washed in RPMI and counted on a hemacytometer. Monocytes were purified from PBMC using a miltenyi Pan Monocyte Isolation negative selection kit according to the manufacturer's instructions. For each sample. 50,000 viable cells were pelleted and lysed with cold ATAC-Resuspension Buffer (RSB) containing 0.1% NP40, 0.1% Tween-20, and 0.01% Digitonin and incubated in ice for 3 minutes. The lysaste was washed with 1 ml of cold ATAC-RSB containing 0.1% Tween-20 but NO NP40 or digitonin. Nuclei were pelleted at 500 RCF for 10 min at 4 degrees celcius. The supernatant was discarded and the pellet was resuspended in 50 uL of transposition mixture (25 ul 2x TD buffer, 2.5 ul transposase (100nM final), 16.5 ul PBS,0.5 ul 1% digitonin, 0.5 ul 10% Tween-20, 5 ul H2O). The reaction was incubated for 30 minutes in a thermomixer with 1000 RPM mixing. Zymo DNA Clean and concentrator kit (cat# D4014) was used as a cleanup step. The DNA was amplified at 98 degrees C for 30 seconds, then 13 cycles of: 98 degrees C for 10 seconds, 63 degrees C for 30 seconds, 72 degrees C for 1 minute.The library was evaluated in an Agilent TapeStation system and the DNA concentration evaluated by Qubit. Sequencing was performed on Illumina Nextseq 500 with Buffer cartridge v2: Ref: 15057941, High output reagent cartridge v2: Ref: 15057934, NextSeq accessory Box v2: Ref: 15058251, and High output Flow Cell cartridge v2.5: Ref: 20022408
2022-04-24 | E-MTAB-11643 | biostudies-arrayexpress
Project description:We procured PBMCs whole blood from five HC preterm infants and five preterm infants with BPD. PBMCs were extracted using a density gradient centrifugation method. Initially, 10ml of peripheral blood was mixed with an equal volume of physiological saline, then carefully layered onto Ficoll solution (T10124, from Shangbao Biotech Co., Ltd., Shanghai). After centrifugation at 2,000 rpm for 20 minutes, the cells stratified due to differences in density, with PBMCs positioned between the red blood cells and plasma. Subsequently, the intermediate layer containing PBMCs was gently collected, washed several times with physiological saline to remove residual medium and red blood cells, and finally, PBMCs were isolated and collected through centrifugation.
2024-10-20 | E-MTAB-14507 | biostudies-arrayexpress