LiberaseTM cell dissociation for axolotl/frog limb cells
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Prepare Reagents
0.7x PBS
- Dilute 1x PBS to 0.7x with dH2O
- -> Chill on ice before use.
Liberase TM solution
- 40uL Stock Liberase TM (100x, 26WU/mL)
- 3960uL 0.7xPBS in a FACS tube
- -> Chill on ice before use.
AMEM(0) (serum-free medium)
- 114.3mL F12:DMEM+Glutmax
- 1.5mL Sodium pyruvate (100mM)
- 1.5mL B27 supplement
- 1.5mL Insulin (1 mg/mL)
- 1.5mL MEM Non-Essential Amino Acid (NEAA)
- 1.5mL Penicillin/Streptomycin (10000 U/mL)
- 28.2mL Sterile ddH2O
- -> Total 150mL, filter.
- -> Chill on ice before use.
High-Serum AMEM (HS-AMEM)
- 125mL Minimum essential medium (MEM)
- 20mL Heat-inactivated fetal bovine serum (56 degree, 30 min)
- 2mL Insulin (1 mg/mL)
- 2mL Glutamine (200mM)
- 2mL Penicillin/Streptomycin (10000 U/mL)
- 49mL Sterile ddH2O
- -> Total 200mL, filter.
- -> Chill on ice before use.
Liberase TM cell dissociation on amphibian limb tissue
- Collect the limb tissue to dissociate into a new 100mm dish.
- Wash the tissue in a 60mm dish with 0.7x PBS to remove blood and debris.
- Transfer the tissue into a new 60mm dish with fresh 0.7x PBS.
- Remove the skin.
- Transfer the limb mesenchyme into a new 60mm dish. Remove as much liquid as possible.
- Chop the tissue into <500mm^3 cubes with a #21 scalpel.
- Transfer the tissue pieces into the Liberase TM solution.
- Rotate on a wheel 40-50 minutes, room temperature. Vigorously shake every 15-20 minutes to disperse the tissue.
- The tissue will start to clump together after ~20 minutes.
- Put the tube on a rack and wait until the remaining tissue pieces to settle down.
- Collect the cleared, top 3mL solution and filter through a 30mm filter cup on a 15mL falcon tube.
- Mechanically dissociate the remaining tissue by pipetting the remaining 1mL solution 15-20 times with a P1000 tip.
- Filter the remaining solution with the same 30mm filter cup.
- Stop the enzymatic reaction by washing the FACS tube with 4mL HS-AMEM, and then filter the HS-AMEM with the same 30mm filter cup.
- Collect the remaining solution at the bottom of the filter cup into the 15mL falcon tube, gently mix.
- -> If doing scRNA-seq directly, continue with these steps.
- Centrifuge 300xrcf, 20 degree, 5 minutes. Remove supernatant.
- Wash the cell pellet with 5mL 0.7xPBS
- Centrifuge 300xrcf, 20 degree, 5 minutes. Remove supernatant.
- The sample is ready for downstream applications: