The embryonal carcinoma (EC) cell line P19 can be induced to different
iate into neurons and glia by treatment with retinoic acid. Neuronal c
ells derived from P19 stem cells were found to express messenger RNAs
for alpha, beta, and gamma(2) subunits of the GABA(A) receptor-chlorid
e channel complex. Whole-cell voltage-clamp recording in differentiate
d P19 cells revealed that these cells possess GABA receptor-activated
chloride currents which are blocked by bicuculline and potentiated by
flurazepam. P19 EC cells thus represent a stable neuronal cell line wh
ich expresses functional GABA(A) receptors with all of the characteris
tics of native GABA(A) receptors.