Table I

Effects of M1 receptor stimulation and PI 4 kinase inhibition on TRPV3 channel activity.

Treatment:  CCh (+Ca2+iCCh (−Ca2+iPAO 
DNA:  WT R696A K705A WT R696A K705A WT R696A K705A 
Fold change Mean 21.4 9.7 3.6a 2.9 4.0 1.5a 19.6 3.3a 1.5a 
SEM 1.6 3.3 0.3 0.4 0.6 0.1 5.6 1.0 0.1 
ΔV0.5 (mV) Mean −117.3 −45.8a −64.4a −51.0 −35.1 −22.9 −109.9 −30.1a −22.5a 
SEM 19.4 10.8 7.8 10.0 8.6 7.8 23.9 7.6 5.3 
ΔVIF (%) Mean 23.1 21.3 8.3a 5.5 24.0 1.3a 19.1 12.2 2.3a 
SEM 3.5 5.2 3.0 1.2 8.6 1.2 3.4 3.8 1.0 
 n 
Treatment:  CCh (+Ca2+iCCh (−Ca2+iPAO 
DNA:  WT R696A K705A WT R696A K705A WT R696A K705A 
Fold change Mean 21.4 9.7 3.6a 2.9 4.0 1.5a 19.6 3.3a 1.5a 
SEM 1.6 3.3 0.3 0.4 0.6 0.1 5.6 1.0 0.1 
ΔV0.5 (mV) Mean −117.3 −45.8a −64.4a −51.0 −35.1 −22.9 −109.9 −30.1a −22.5a 
SEM 19.4 10.8 7.8 10.0 8.6 7.8 23.9 7.6 5.3 
ΔVIF (%) Mean 23.1 21.3 8.3a 5.5 24.0 1.3a 19.1 12.2 2.3a 
SEM 3.5 5.2 3.0 1.2 8.6 1.2 3.4 3.8 1.0 
 n 

Effects of M1 stimulation (CCh) or PI 4 kinase inhibition (PAO) on current amplitude and voltage dependence for WT TRPV3, R696A, and K705A channels expressed in HM1 cells recorded with either 50 nM [Ca2+i] (+) or <10 nM [Ca2+i] (−) to control PLCβ activity. Currents were recorded in the presence of 10 µM (WT), 3 µM (R696A), or 6 µM (K705A) 2-APB at +80 mV. Final drug concentrations: 100 µM CCh and 30 µM PAO.

a

P < 0.05 comparing WT TRPV3 and R696A or K705A, respectively.

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