Description
BD IMag™ anti-CD11b Particles - DM are magnetic nanoparticles that have monoclonal antibody conjugated to their surfaces. These particles areoptimized for the positive selection or depletion of CD11b-bearing leukocytes using the BD IMag™ Cell Separation Magnet. CD11b is expressed at varying levels on granulocytes, macrophages, myeloid-derived dendritic cells, natural killer cells, and B-1 cells and is rapidly upregulated on neutrophils after activation.
Format
- FormatBD IMag™-DM
Suggested Companion Products
Cell Separation Magnet RUO Cat No: 552311
PE Rat Anti-Mouse Ly-6G and Ly-6C RB6-8C5RUO 0.1mgCat No: 553128
Purified Rat Anti-Mouse CD16/CD32 (Mouse BD Fc Block™) 2.4G2RUO 0.5mgCat No: 553142
FITC Rat Anti-CD11b M1/70RUO 0.5mgCat No: 553310
Buffer (10X) RUO 100mLCat No: 552362
Purified Rat Anti-Mouse CD16/CD32 (Mouse BD Fc Block™) 2.4G2RUO 0.1mgCat No: 553141
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Preparation and Storage
Store undiluted at 4°C.The monoclonal antibody was purified from tissue culture supernatant or ascites by affinity chromatography.Antibody or streptavidin was conjugated to the magnetic particles under optimum conditions, and unconjugated antibody/streptavidin was removed.
Product Notices
- Please refer to www.bdbiosciences.com/pharmingen/protocols for technical protocols.
- Caution: Sodium azide yields highly toxic hydrazoic acid under acidic conditions. Dilute azide compounds in running water before discarding to avoid accumulation of potentially explosive deposits in plumbing.
- Source of all serum proteins is from USDA inspected abattoirs located in the United States.
- BD IMag™ particles are prepared from carboxy-functionalized magnetic particles which are manufactured by Skold Technology and are licensed under US patent number 7,169,618.
- Species testing during development may have been performed with a different format of the same clone.Selected applications have been tested for cross-reactivity.
Leukocytes are labeled with BD IMag™ anti-CD11b Particles - DM according to the Magnetic Labeling Protocol. This labeled cell suspension is then placed within the magnetic field of the BD IMag™ Cell Separation Magnet (Cat. No. 552311). Labeled cells migrate toward the magnet (positive fraction), leaving the unlabeled cells in suspension so they can be drawn off (negative fraction). The tube is then removed from the magnetic field for resuspension of the positive fraction. The separation is repeated twice to increase the purity of the positive fraction. The magnetic separation steps are diagrammed in the Separation Flow Chart. After the positive fraction is washed, the small size of the magnetic particles allows the positive fraction to be further evaluated in downstream applications such as flow cytometry.
MAGNETIC LABELING PROTOCOL
1. Prepare a single-cell suspension from the lymphoid tissue of interest according to standard laboratory procedures. Remove clumps of cells and/or debris by passing the suspension through a 70-µm nylon cell strainer.
2. Dilute BD IMag™ Buffer (10X) (Cat. no. 552362) 1:10 with sterile distilled water or prepare 1X BD IMag™ buffer by supplementing Phosphate Buffered Saline with 0.5% BSA, 2 mM EDTA, and 0.09% sodium azide. Place on ice. In our experience, Mouse BD Fc Block™ purified anti-mouse CD16/CD32 mAb 2.4G2 (Cat. no. 553141/553142) is not required for optimal cell separation, but some laboratories may use it.If adding Mouse BD Fc Block™, proceed to Step 3.If not adding Mouse BD Fc Block™, proceed to Step 4.
3. Add Mouse BD Fc Block at 0.25 µg/10e6 cells, and incubate on ice for 15 minutes.
4. Wash cells with at least an equal volume of 1X BD IMag™ buffer, and carefully aspirate all the supernatant.
5. Vortex the BD IMag™ anti-CD11b Particles - DM thoroughly, and add 50 µl of particles for every 10e7 total cells.
6. MIX THOROUGHLY. Refrigerate at 6°C - 12°C for 30 minutes.
7. Bring the BD IMag-particle labeling volume up to 1 - 8 x 10e7 cells/ml with 1X BD IMag™ buffer, and immediately place the tube on the Cell Separation Magnet. Incubate at room temperature for 6 - 8 minutes.
8. With the tube on the Cell Separation Magnet, carefully aspirate off the supernatant. This supernatant contains the negative fraction.
9. Remove the tube from the Cell Separation Magnet, and add 1X BD IMag™ buffer to the same volume as in Step 7. Gently resuspend cells by pipetting briefly, and return the tube to the Cell Separation Magnet for another 2 - 4 minutes.
10. With the tube on the Cell Separation Magnet, carefully aspirate off the supernatant and discard.
11. Repeat Steps 9 and 10.
12. After the final wash step, resuspend the positive fraction in an appropriate buffer and at an appropriate concentration for further analysis.
NOTE: Avoid nonspecific labeling by working quickly and adhering to recommended incubation times.
