Recipe

Slice Culture Medium

Reagent Final concentration Amount (for 500 mL)
MEM (Sigma-Aldrich M7278)  394 mL
Heat-inactivated horse seruma    20%  100 mL
l-glutamine (200 mm; Gibco 25030-024)    1 mm  2.5 mL
Insulin (1 mg/mL; Sigma-Aldrich I6634) 0.01 mg/mL  0.5 mL
NaCl (5 m; Sigma-Aldrich S5150) 1.45 mL
MgSO4 (1 m; Fluka 63126)    2 mm   1 mL
CaCl2 (1 m; Fluka 21114)   1.44 mm 0.72 mL
Ascorbic acid (25%; Fluka 11140)   0.00125%  2.4 µL
d-glucose (Fluka 49152)   13 mm  1.16 g
aThe serum is often a critical factor in slice quality and it is often necessary to test several batches (lots); three products that have been successfully used are Sigma-Aldrich H1138, Gibco 26050070, and Gibco 16050122. Gibco 16050122 must be heat-inactivated for 30 min at 55°C.
After mixing, filter-sterilize (0.2-µm pore size), and store at 4°C in 50-mL aliquots. (The solution should be orange-red [i.e., pH ∼7.3] and osmolality should be ∼320 mOsm/kg.)
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