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This cell line is useful to study molecular mechanism of cell apoptosis, BCL-2 family pathway, BAX function, as well as cells that are resistant to multiple apoptotic stimuli.

Cells are immortalized MEFs (genotype: bax^-/-), which were generated from BAX knockout mice. 

BAX is a pro-apoptotic BCL-2 family member.  Cells are sensitive to tBID-induced cytochrome c release and apoptosis.

Cells are sensitive to Bim and Bad expression induced apoptosis. 

This cell line is useful to study molecular mechanism of cell apoptosis, BCL-2 family pathway, BAX function, as well as cells that are resistant to multiple apoptotic stimuli.

1. Remove and discard culture medium.
2. Briefly rinse the cell layer with Ca++/Mg++ free Dulbecco's phosphate-buffered saline (D-PBS) or 0.25% (w/v) Trypsin - 0.53 mM EDTA solution to remove all traces of serum which contains trypsin inhibitor.
3. Add 1.0 to 2.0 mL of Trypsin-EDTA solution to flask and observe cells under an inverted microscope until cell layer is dispersed (usually within 5 to 15 minutes).
   Note: To avoid clumping do not agitate the cells by hitting or shaking the flask while waiting for the cells to detach. Cells that are difficult to detach may be placed at 37°C to facilitate dispersal.
4. Add 6.0 to 8.0 mL of complete growth medium and aspirate cells by gently pipetting.
5. Add appropriate aliquots of the cell suspension to new culture vessels. An inoculum of 4 X 10³ to 1 X 10⁴ viable cells/cm² is recommended.
6. Incubate cultures at 37°C. At subculture, cell concentration is between 8 X 10⁴ to 1.5 X 10⁵ cells/cm².

Wei M, et al. Proapoptotic BAX and BAK: a requisite gateway to mitochondrial dysfunction and death. Science 292(5517): 727-730, 2001 PubMed: 11326099

Lindsten T, et al. The Combined Functions of Proapoptotic Bcl-2 Family Members Bak and Bax Are Essential for Normal Development of Multiple Tissues. Molecular Cell 6(6): 1389-1399, 2000 PubMed: 11163212

Zong WX, et al. BH3-only proteins that bind pro-survival Bcl-2 family members fail to induce apoptosis in the absence of Bax and Bak. Genes Dev. 15(12): 1481-6, 2001 PubMed: 11410528

Cheng EH, et al. BCL-2, BCL-XL Sequester BH3 Domain-Only Molecules Preventing BAX- and BAK-Mediated Mitochondrial Apoptosis. Molecular Cell 8(3) : 705–711, 2001 PubMed: 11583631