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Imiquimod enhances excitability of dorsal root ganglion neurons by inhibiting background (K(2P)) and voltage-gated (K(v)1.1 and K(v)1.2) potassium channels.

Jaekwang Lee | Taekeun Kim | Jinpyo Hong | Junsung Woo | Hyunjung Min | Eunmi Hwang | Sung Joong Lee | C Justin Lee
Molecular pain | 2012

Imiquimod (IQ) is known as an agonist of Toll-like receptor 7 (TLR7) and is widely used to treat various infectious skin diseases. However, it causes severe itching sensation as its side effect. The precise mechanism of how IQ causes itching sensation is unknown. A recent report suggested a molecular target of IQ as TLR7 expressed in dorsal root ganglion (DRG) neurons. However, we recently proposed a TLR7-independent mechanism, in which the activation of TLR7 is not required for the action of IQ in DRG neurons. To resolve this controversy regarding the involvement of TLR7 and to address the exact molecular identity of itching sensation by IQ, we investigated the possible molecular target of IQ in DRG neurons.

Pubmed ID: 22233604

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pClamp (tool)

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C57BL/6J (tool)

RRID:IMSR_JAX:000664

Mus musculus with name C57BL/6J from IMSR.

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