Summary of electrophysiological parameters determined for Nav1.7 and the two mutations Nav1.7/L823R and Nav1.7/I1461T
| . | Nav1.7/WT . | Nav1.7/L823R . | Nav1.7/I1461T . | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 15°C | 25°C | 35°C | 15°C | 25°C | 35°C | 15°C | 25°C | 35°C | |
| Activation parameter | |||||||||
| V1/2(mV) | −27.5 ± 0.7 | −32.0 ± 0.5 | −35.4 ± 0.5 | −37.4 ± 0.6 | −41.2 ± 0.5 | −44.8 ± 0.8 | −16.7 ± 0.7 | −23.4 ± 0.6 | −27.1 ± 0.6 |
| k | 6.3 ± 0.2 | 4.5 ± 0.2 | 4.2 ± 0.2 | 10.6 ± 0.3 | 7.0 ± 0.2 | 6.3 ± 0.3 | 8.5 ± 0.2 | 7.0 ± 0.2 | 6.0 ± 0.2 |
| Time-to-peak (ms) | 0.64 ± 0.01 | 0.38 ± 0.005 | n.a. | 0.71 ± 0.05 | 0.43 ± 0.01 | n.a. | 1.07 ± 0.06 | 0.47 ± 0.01 | n.a. |
| n | 94 | 80 | 81 | 73 | 88 | 37 | 50 | 50 | 51 |
| Inactivation parameter | |||||||||
| V1/2(mV) | −76.2 ± 0,9 | −75.4 ± 0.5 | −76.1 ± 0.7 | −81.3 ± 0.4 | −76.4 ± 0.5 | −76.6 ± 0.9 | −67.1 ± 0.7 | −65.8 ± 0.8 | −60.6 ± 0.8 |
| k | −10.3 ± 0.3 | −7.0 ± 0.1 | −7.3 ± 0.1 | −6.5 ± 0.2 | −5.1 ± 0.1 | −5.8 ± 0.2 | −7.8 ± 0.2 | −8.1 ± 0.2 | −6.9 ± 0.2 |
| n | 138 | 135 | 121 | 70 | 81 | 49 | 49 | 66 | 57 |
| Inactivation kinetics | |||||||||
| τ (ms) (0 mV) | 1.13 | 0.53 | 0.28 | 1.47 | 0.60 | 0.35 | 2.73 | 0.70 | 0.33 |
| n | 93 | 76 | 79 | 71 | 84 | 29 | 50 | 47 | 42 |
| Max Ipers(% from Imax) | 2.5 ± 0.3 | 0.7 ± 0.1 | n.a. | 10.0 ± 0.4 | 3.8 ± 0.1 | 2.4 ± 0.4 | 14.4 ± 1.4 | 3.9 ± 0.6 | 1.8 ± 0.2 |
| n | 94 | 76 | 81 | 73 | 84 | 37 | 50 | 48 | 51 |
| Recovery from fast inactivation | |||||||||
| % τ fast | 87.0 | 81.4 | 51.0 | 86.4 | 87.3 | 56.9 | 78.4 | 51.3 | 31.7 |
| τ fast (ms) | 49.2 | 13.3 | 8.5 | 89.0 | 20.0 | 11.0 | 22.4 | 8.34 | 589.2 |
| τ slow (ms) | 447.8 | 428.8 | 621.9 | 403.4 | 315.4 | 550.1 | 337.3 | 523.5 | 589.2 |
| n | 74 | 87 | 61 | 50 | 62 | 24 | 35 | 54 | 45 |
| . | Nav1.7/WT . | Nav1.7/L823R . | Nav1.7/I1461T . | ||||||
|---|---|---|---|---|---|---|---|---|---|
| 15°C | 25°C | 35°C | 15°C | 25°C | 35°C | 15°C | 25°C | 35°C | |
| Activation parameter | |||||||||
| V1/2(mV) | −27.5 ± 0.7 | −32.0 ± 0.5 | −35.4 ± 0.5 | −37.4 ± 0.6 | −41.2 ± 0.5 | −44.8 ± 0.8 | −16.7 ± 0.7 | −23.4 ± 0.6 | −27.1 ± 0.6 |
| k | 6.3 ± 0.2 | 4.5 ± 0.2 | 4.2 ± 0.2 | 10.6 ± 0.3 | 7.0 ± 0.2 | 6.3 ± 0.3 | 8.5 ± 0.2 | 7.0 ± 0.2 | 6.0 ± 0.2 |
| Time-to-peak (ms) | 0.64 ± 0.01 | 0.38 ± 0.005 | n.a. | 0.71 ± 0.05 | 0.43 ± 0.01 | n.a. | 1.07 ± 0.06 | 0.47 ± 0.01 | n.a. |
| n | 94 | 80 | 81 | 73 | 88 | 37 | 50 | 50 | 51 |
| Inactivation parameter | |||||||||
| V1/2(mV) | −76.2 ± 0,9 | −75.4 ± 0.5 | −76.1 ± 0.7 | −81.3 ± 0.4 | −76.4 ± 0.5 | −76.6 ± 0.9 | −67.1 ± 0.7 | −65.8 ± 0.8 | −60.6 ± 0.8 |
| k | −10.3 ± 0.3 | −7.0 ± 0.1 | −7.3 ± 0.1 | −6.5 ± 0.2 | −5.1 ± 0.1 | −5.8 ± 0.2 | −7.8 ± 0.2 | −8.1 ± 0.2 | −6.9 ± 0.2 |
| n | 138 | 135 | 121 | 70 | 81 | 49 | 49 | 66 | 57 |
| Inactivation kinetics | |||||||||
| τ (ms) (0 mV) | 1.13 | 0.53 | 0.28 | 1.47 | 0.60 | 0.35 | 2.73 | 0.70 | 0.33 |
| n | 93 | 76 | 79 | 71 | 84 | 29 | 50 | 47 | 42 |
| Max Ipers(% from Imax) | 2.5 ± 0.3 | 0.7 ± 0.1 | n.a. | 10.0 ± 0.4 | 3.8 ± 0.1 | 2.4 ± 0.4 | 14.4 ± 1.4 | 3.9 ± 0.6 | 1.8 ± 0.2 |
| n | 94 | 76 | 81 | 73 | 84 | 37 | 50 | 48 | 51 |
| Recovery from fast inactivation | |||||||||
| % τ fast | 87.0 | 81.4 | 51.0 | 86.4 | 87.3 | 56.9 | 78.4 | 51.3 | 31.7 |
| τ fast (ms) | 49.2 | 13.3 | 8.5 | 89.0 | 20.0 | 11.0 | 22.4 | 8.34 | 589.2 |
| τ slow (ms) | 447.8 | 428.8 | 621.9 | 403.4 | 315.4 | 550.1 | 337.3 | 523.5 | 589.2 |
| n | 74 | 87 | 61 | 50 | 62 | 24 | 35 | 54 | 45 |
n.a., not available.