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Induction FAS
Receptor-Mediated Apoptosis in Mouse Cells Using anti-Fas/CD95 (Clone Jo2)
Materials Required
- A cell line or primary cells that can be induced to undergo apoptosis by mouse Fas mAb. We typically use thymocytes isolated from a 4-6 week old BALB/c mouse.
Note: Not all cell types that express Fas can be induced to undergo apoptosis using this protocol. - Anti-mouse Fas mAb, Clone Jo2 (Cat. No. 554254).
- Recombinant Protein G (SIGMA, Cat. No. P4689). The addition of Protein G to the tissue culture medium can enhance the efficiency of Jo2 mAb to induce apoptosis in some experimental systems.
- Tissue culture flasks or plates.
- RPMI-1640 medium supplemented with 10% heat-inactivated fetal bovine serum (FBS), 1% L-glutamine and 1% antibiotics (penicillin/streptomycin; 100 U/ml). This supplemented medium is referred to as 'medium' below.
Procedure
- Isolate BALB/c thymocytes from the thymus of a 4-6 week old mouse.
- Treat cell suspension (2 x 10 6-1 x 10 7 thymocytes/ml) with 2-20 µg/ml Jo2 mAb. Negative controls should consist of cells cultured in medium without the addition of anti-Fas and medium containing a hamster isotype control (clone Ha4/8, Cat. No. 553961) at the same concentration as the anti-Fas mAb. If Protein G (1-2 µg/ml) is added along with Jo2, then add controls containing (1) Protein G alone and (2) Protein G plus the Ha4/8 mAb.
- Perform a time course to obtain optimum results. Incubation time between 2 to 12 hr at 37°C is suggested.
- Proceed with assays designed to evaluate induction of apoptosis.
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