Table 1.

Membrane properties of CA1 pyramidal cells after exposure to Tat and morphine

In vivo treatment	Tat− Vehicle n = 13	Tat+ Vehicle n = 12	Tat− Morphine n = 19	Tat+ Morphine n = 13	Tat− Morphine n = 29	Tat+ Morphine n = 22
Ex vivo treatment	-	-	Morphine	Morphine	-	-
Capacitance (pF)	130.2 ± 12.4	175.4 ± 16.0	157.7 ± 9.5	138.4 ± 10.3	166.3 ± 8.8	184.7 ± 13.5
Resistance (MΩ)	182.1 ± 21.6	154.7 ± 16.9	146.4 ± 10.2	127.2 ± 8.9	179.0 ± 10.9	149.2 ± 16.2

Capacitance and resistance values from pyramidal cell recordings from Tat− and Tat+ mice maintained on vehicle (control)-containing or morphine (25 mg)-containing time-release implants in which morphine (500 nm) was present (“morphine”) or withheld (-) during recordings in hippocampal slices ex vivo. No significant changes were observed. All values are shown as the mean ± SEM.