TABLE 1

Activation and inactivation gating parameters of Nav1.4 channels in the absence or presence of metaflumizone

Values calculated from fits of data obtained in the absence or presence of 10 μM metaflumizone (Fig. 2) to the Boltzmann equation.

ConditionActivationFast InactivationSlow Inactivation
V1/2knV1/2knV1/2kn
mVmVmV
Control−24.9 ± 0.75.9 ± 0.65−53.3 ± 0.25.0 ± 0.25−44.9 ± 0.79.3 ± 0.66
Metaflumizone−20.2 ± 0.7*6.4 ± 0.65−53.5 ± 0.25.2 ± 0.25−48.4 ± 0.97.5 ± 0.85
  • V1/2, midpoint potential for voltage-dependent activation or inactivation; k, slope factor.

  • * Significantly different from control (paired t test, P < 0.05).

  • Significantly different from control (unpaired t test, P < 0.05).