Flow cytometry Anti-bodies Human - CD45

Flow cytometry is an immunophenotyping technique whereby sing cell suspensions are stained for either cell surface markers or intracellular proteins by fluorescently-labelled antibodies and analyzed with a flow cytometer, where fluorescently-labelled molecules are excited by the laser to emit light at varying wavelengths, which is then detected by the instrument. There are several key criteria which are required to be kept in mind while designing a flow experiment- 1. Antibody titration (optimal dilution of antibodies should be calculated in order to avoid over- or under- saturated signals for proper detection of surface and intracellular markers), 2. Precision (3 or more replicates of the sample should be used per experiment), 3. Specificity (proper isotype controls should be included in the experiment), 4. Day-to-day variability (experiments should be repeated 3 or more times to ensure consistency and avoid variability due to flow cytometer settings), 5. Antibody interaction (Fluorescence minus one or FMO should be used, which is the comparison of signals from panel minus one antibody vs. the full panel), and 6. Antibody stability (fluorescently-labelled antibodies should be stored at 4C).

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Found 3 matching solutions for this experiment

Protocol tips
After incubation with monoclonal antibodies for 15 min (min) at 4°C, erythrocytes were lysed with ammonium chloride (PharmLyse, BD Biosciences, San Diego, California) at room temperature for 10 min using a standard lyse/wash technique. Samples were acquired on FACSCanto II instruments (BD Biosciences). For the detection of cytoplasmic antigens, cells were fixed and permeabilized using 4% formaldehyde and 0.25% Saponin. CD30‐PE was purchased from Beckman Coulter and all other antibodies were purchased from BD Biosciences.
Downstream tips
A total of 200,000 events were acquired for assessment of these investigated antibodies.

Data were analyzed using FCS Express software (De Novo Software, Los Angeles, California). Non‐viable cells, debris, and aggregates were excluded based on forward scatter‐height/forward scatter‐area (FSC‐H/FSC‐A).
Upstream tips
To perform flow cytometry analysis and to sort BFU-E and CFU-E cells from primary human samples including BM, cord blood, and peripheral blood, we isolated CD45+ cells from mononuclear cells (MNC) derived by Ficoll density gradient separation, followed by positive selection using CD45 magnetic beads.
Protocol tips
Ab or appropriate isotype controls (all from BD Biosciences) were incubated for 30 minutes in the dark. Cells were washed twice with 40 mL phosphate-buffered saline/0.5% bovine serum albumin, resuspended in 5 mL phosphate-buffered saline/0.5% bovine serum albumin, and stained with the viability marker 7-AAD on ice for 10 minutes in the dark.
Downstream tips
The analysis was performed using BD FACSDiva. Sorting was performed using a MoFlo high-speed cell sorter (Beckman Coulter). The number of BFU-E or CFU-E cells in one million MNCs was quantitated.
Protocol tips
Heparinized bone marrow (BM) and peripheral blood (PB) cells (106 leukocytes per tube) were incubated with various combinations of mAb (Supplementary Table S3) for 15 minutes. Then, erythrocytes were lysed in FACS-Lysing-Solution (BD Biosciences, San José, CA, USA). Washed cells were acquired on a FACSCalibur (BD Biosciences) and analyzed by FlowJo software (TreeStar, Ashland, OR, USA) as reported
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