Table 1.
Intrinsic properties of small-diameter TG neurons expressing mutant TRESK subunits
Diameter (μm) | Capacitance (pF) | Rin (MΩ) | Vrest (mV) | Rheobase (pA) | AP threshold (mV) | AP amplitude (mV) | AP half-width (ms) | AHP amplitude (mV) | Cell number | |
---|---|---|---|---|---|---|---|---|---|---|
IB4-negative neurons | ||||||||||
Control | 20.3 ± 0.2 | 25.2 ± 0.7 | 942 ± 78 | -52.9 ± 0.5 | 75.0 ± 3.0 | -14.4 ± 0.6 | 112.2 ± 1.4 | 4.9 ± 0.2 | -14.2 ± 0.5 | 14 |
Mutant | 19.5 ± 0.2 | 22.5 ± 0.7 | 1123 ± 48 | -52.1 ± 0.6 | 38.5 ± 1.8* | -23.2 ± 0.6* | 107.9 ± 2.1 | 4.5 ± 0.3 | -12.0 ± 0.4 | 12 |
IB4-positive neurons | ||||||||||
Control | 19.9 ± 0.2 | 22.4 ± 1.0 | 1358 ± 166 | -53.5 ± 0.7 | 77.3 ± 4.5 | -17.1 ± 0.9 | 104.4 ± 2.4 | 4.6 ± 0.1 | -14.9 ± 0.5 | 11 |
Mutant | 18.6 ± 0.2 | 19.5 ± 0.7 | 1388 ± 94 | -52.4 ± 0.6 | 40.0 ± 2.3* | -18.7 ± 1.2 | 113.3 ± 2.2 | 4.1 ± 0.2 | -15.4 ± 0.3 | 10 |
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Neurons in the control group express DsRed protein alone; the mutant group contains TG neurons coexpressing DsRed protein and MT TRESK subunits. Rin was calculated by measuring the change of membrane potential in response to a 20 pA hyperpolarizing current injection from Vrest.
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↵*p < 0.05 compared with the corresponding control group by two-tailed t test.