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Updated: Jul 17, 2026

Patch Clamp Recordings on Intact Dorsal Root Ganglia from Adult Rats
Published on: September 29, 2016
G protein-coupled inwardly rectifying potassium channels in dorsal root ganglion neurons
Xiao-fei Gao1, Hai-lin Zhang, Zhen-dong You
1Department of Neurobiology, Second Military Medical University, Shanghai 200433, China.
Aim:
G protein-coupled inwardly rectifying potassium channels (GIRK) are important for neuronal signaling and membrane excitability. In the present study, we intend to find whether GIRK channels express functionally in adult rat dorsal root ganglion (DRG) neurons.
Methods:
We used RT-PCR to detect mRNA for 4 subunits of GIRK in the adult DRG. The whole-cell patch clamp recording was used to confirm GIRK channels functionally expressed.
Results:
The mRNA for the 4 subunits of GIRK were detected in the adult DRG. GTPgammaS enhanced inwardly rectifying potassium (K+) currents of the DRG neurons, while Ba2+ inhibited such currents. Furthermore, the GIRK channels were shown to be coupled to the GABA(B) receptor, a member of the G protein-coupled receptor family, as baclofen increased the inwardly rectifying K+ currents.
Conclusion:
GIRK channels are expressed and functionally coupled with GABA(B) receptors in adult rat DRG neurons.
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