Table 1.
Displacement of [3H]epibatidine binding to spinal cord membranes by α-conotoxin MII
Ki (nM) | % Total Binding | |||
---|---|---|---|---|
High affinity | Low affinity | High affinity | Low affinity | |
Normal | 2.7 ± 1.6 | 83.5 ± 3.2 | 59 ± 11% | 41 ± 11% |
SNL | 3.2 ± 1.5 | 67.5 ± 2.1 | 54 ± 11% | 46 ± 11% |
Mean Ki values ± S.E.M. of α-CTX MII displacement of 0.8 nM [3H]epibatidine to spinal cord membranes from normal and spinal nerve-ligated (SNL) rats are shown. Ki values were calculated using the previously reported KD = 0.12 nM of epibatidine to α3β2 nAChRs (Wang et al., 1996). The mean percent contribution ± S.E.M. of high and low affinity sites to total α-CTX MII binding in spinal cord membranes from normal and SNL rats is shown.