Table 1.
Effects of SNAP on action potential characteristics of bladder afferent neurons
TTX-Resistant Neurons | TTX-Sensitive Neurons | |||
---|---|---|---|---|
Control | SNAP (500 μM) | Control | SNAP (500 μM) | |
Resting membrane potential, mV | −51.2 ± 1.2 | −50.6 ± 1.1 | −54.4 ± 2.2 | −53.3 ± 2.3 |
Spike threshold, mV | −20.6 ± 1.6 | −21.1 ± 1.4 | −28.2 ± 2.1 | −27.6 ± 2.5 |
Spike amplitude, mV | 80.4 ± 3.6 | 83.1 ± 4.0 | 86.4 ± 5.1 | 83.3 ± 6.0 |
Firing frequency, spikes | 1.4 ± 0.2 | 1.3 ± 0.2 | 13.8 ± 1.5 | 14.3 ± 1.8 |
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Data were obtained before (control) and 2 min after application of S-nitroso-N-acetylpenicillamine (SNAP, 500 μM). Firing frequency was expressed as the number of spikes elicited by 500-ms depolarizing current pulses. Values are means ± SE.n = 12 and 5 for TTX-resistant and TTX-sensitive neurons, respectively.