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Assay Method Information |
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| | NAV1.7 P1 BLOCK (nM) (Automated Patchclamp) |
| Description: | In some cases, the potency of compounds was measured using either the Patchliner automated patch clamp platform (Nanion) or manual patch clamp techniques. Both approaches allowed the compounds to be characterized based upon the ability of a compound to modulate use- and/or state-dependence. The potency data is tabulated in Table 3 and is represented by eight data fields. The first four fields represent potency data measured with the Patchliner automated platform under varying use- and state-dependent electrophysiology protocols similar to the Patch express protocols detailed above. The first data column describes the potency of compounds when the Nav1.7 channel is being repetitively activated at a 7 Hz hyperpolarization frequency (Table 3: hNav1.7: IC50 of inward current block at 7 Hz, Automated patchclamp). The second data column represents the potency at which 50% of the initial hyperpolarization pulse is inhibited by the compounds (Table 3: hNav1.7: IC50 of P1 block, Automated patchclamp). The third data column details the potency of compounds in their ability to block 50% of Nav1.7 channels when these channels are induced into the slow inactivated state (Table 3: hNav1.7: IC50 of slow inactivation block, Automated patchclamp). The fourth data column shows potency data at which 50% of channel activity is blocked when repetitively activated at a 0.25 Hz hyperpolarizing frequency (Table 3: hNav1.7: IC50 of inward current block at 0.25 Hz, Automated patchclamp). The next three data fields describe the data generated from manual patchclamp electrophysiology measurements using similar methods to those employed for automated patchclamp studies. The fifth and sixth data columns demonstrate the potency at which 50% of channel activity was inhibited when repetitively activated with a 7 Hz or 0.25 Hz hyperpolarization frequency, respectively (Table 3: hNav1.7: IC50 of inward current block at 7 Hz, Manual patchclamp)(hNav1.7: IC50 of inward current block at 0.25 Hz, Manual patchlamp). The seventh column shows the potency of certain compounds which block 50% channel activity when the Nav1.7 channel is in the slow inactivated state (hNav1.7: IC50 of slow inactivation block, Manual patchclamp). The last column characterizes the state-dependence of compound inhibition. Compounds that maintain the greatest potency for the slow inactivated state over fast inactivated or tonic inhibition at 0.25 Hz are characterized as "state dependent, blocker of slow inactivation". |
| Affinity data for this assay | |
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