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TRPA1 and TRPV1 are crucial pain mediators, but how their interaction contributes to persistent pain is unknown. Here, we identify Tmem100 as a potentiating modulator of TRPA1-V1 complexes. Tmem100 is coexpressed and forms a complex with TRPA1 and TRPV1 in DRG neurons. Tmem100-deficient mice show a reduction in inflammatory mechanical hyperalgesia and TRPA1- but not TRPV1-mediated pain. Single-channel...
Previous studies examining behavioral responses to CO2 revealed that high [CO2] acts as a natural repellent in a concentration dependent manner for crayfish. Physiologically, CO2 can rapidly block the autonomic responses in heart rate, as well as, inhibit an escape tail flip reflex in crayfish. Here, we demonstrate that the behavioral observations can be mechanistically explained by CO2 blocking glutamate...
KCNQ3 homomeric channels yield very small macroscopic currents compared with other KCNQ channels or KCNQ2/3 heteromers. Two disparate regions of the channels—the C-terminus and the pore region—have been implicated in governing KCNQ current amplitudes. We previously showed that the C-terminus plays a secondary role compared with the pore region. Here, we confirm the critical role of the pore region...
Two mechanisms have been postulated to underlie KCNQ3 homomeric current amplitudes, which are small compared with those of KCNQ4 homomers and KCNQ2/Q3 heteromers. The first involves differential channel expression governed by the D-helix within the C-terminus. The second suggests similar channel surface expression but an intrinsically unstable KCNQ3 pore. Here, we find H2O2-enhanced oligomerization...
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