To investigate the effect of interleukin-1beta (IL-1beta) on I(A) and I(K) currents in cultured murine trigeminal ganglion (TG) neurons, whole-cell patch clamp technique was used to record the I(A) and I(K) currents before and after 20 ng/mL I(L)-1beta perfusion. Our results showed that 20 ng/mL IL-1beta inhibited I(A) currents (18.3 +/- 10.7)% (n=6, P<0.05). I(L)-1beta at 20 ng/mL had no effect on G-V curve of I(A) but moved the H-infinity curve V0.5 from -36.6+/-6.1 mV to -42.4+/-5.2 mV (n=5, P<0.01). However, 20 ng/mL IL-1beta had effect on neither the amplitude nor the G-V curve of I(K). IL-1beta was found to selectively inhibit I(A) current in TG neurons and the effect may contribute to hyperalgesia under various inflammatory conditions.

To investigate the effect of interleukin-1β (IL-1β) on IA and IK currents in cultured murine trigeminal ganglion (TG) neurons, whole-cell patch clamp technique was used to record the IA and IKcurrents before and after 20 ng/mL IL-1β perfusion. Our results showed that 20 ng/mL IL-1β inhibited IA currents (18.3±10.7)% (n=6, P＜0.05). IL-1β at 20 ng/mL had no effect on G-V curve of IA but moved the H-infinity curve V0.5 from -36.6 ± 6.1 mV to-42.4 ±5.2 m V (n=5, P＜0.01). However, 20 ng/mL IL-1β had effect on neither the amplitude nor the G-V curve of IK. IL-1β was found to selectively inhibit IA current in TG neurons and the effect may contribute to hyperalgesia under various inflammatory conditions.