We now report hypoxic activation of currents recorded from cell-attached patches of intact SS cells.
In this model, activation of currents by external substrates is associated with the formation of a K+ bound inward-facing conformation in equilibrium with the conducting state.
The S520T mutation slows activation of currents through CLC-5 expressed in Xenopus oocytes (2) and in HEK293 cells (Supplemental Fig. 3).
Indeed, cisplatin and other drugs lead to a slow activation of currents with typical characteristics of ICl,vol, and the resulting AVD could be reduced by non-specific VRAC inhibitors (Shimizu et al, 2004; Poulsen et al, 2010; Min et al, 2011; Cai et al, 2015).
with, where is the electrical potential across a neuron's membrane,, are the gating variables associated with the activation and inactivation of ion currents, respectively, is the gating variable associated with the activation of ions current and where I represents current injected through the cell membrane.
Arrhenius diagrams of ln(J) vs 1/T (Figure 3) show a temperature dependence of the reverse current that confirms a thermal activation of the current and consequently that the carrier transport follows a PF mechanism.
Furthermore, in Figure 9 figure supplement 2 we show that there is difference in the range of activation of Nav current between WT and dKO cells that would account for the observed shifts in 0 current potential and rheobase.
An oscillatory potential region exists between the two stable steady-states where a hysteresis loop is formed by the sudden decrease (Co passivation) and increase (Co activation) of the current as the potential is scanned forward and backward.
Moreover, SKF83959 (50 µM) caused a 6 mV positive shift in the activation curve of Ih and significantly accelerated the activation of Ih current.
The average latency to current on-set was 6.63+/−0.55 ms, therefore considering that the average latency to spike in ChR2mCherry+ neurons was 4.83 ms, the post-synaptic response latency is consistent with monosynaptic activation of the current.
