A. Superimposed traces of glutamate transporter currents recorded
from ventral horn astrocytes from WT (black, n = 15) and
hGFAPTG (cyan, n = 9) astrocytes are shown. Cells were
voltage clamped at −80 mV and responses were evoked by a 200 μM,
400 msec puff of glutamate. Bathing and puffing solutions contained 20
μM AP5, 20 μM bicuculline, 20 μM CNQX, 500 nM TTX and
100 μM CdCl2. Each trace shown is an average of three
individual traces for that astrocyte. B. Averaged data across all
WT (black) and hGFAPTG (cyan) responses are shown. C.
Summary scatter plot of the glutamate evoked responses indicates a decrease in
the hGFAPTG mice (−8.1 ± 4.1 pA, [n =
9]) relative to WT littermate controls (−53.2 ± 4.1 pA,
[n = 15], Two tailed t-test, p = 0.0416).