Materials
Carbenoxolone disodium salt, dexamethasone-21-phosphate disodium salt
and cortisol were purchased from Sigma-Aldrich (St. Louis, MO, USA).
Carbenoxolone disodium salt and dexamethasone-21-phosphate disodium salt
were dissolved in sterile saline to achieve the final concentration as
indicated. Cortisol was dissolved in ethanol as a stock and then diluted
by culture media to final concentration.