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KCNQ4 K(+) channels tune mechanoreceptors for normal touch sensation in mouse and man

Item Type:Article
Title:KCNQ4 K(+) channels tune mechanoreceptors for normal touch sensation in mouse and man
Creators Name:Heidenreich, M. and Lechner, S.G. and Vardanyan, V. and Wetzel, C. and Cremers, C.W. and De Leenheer, E.M. and Aranguez, G. and Moreno-Pelayo, M.A. and Jentsch, T.J. and Lewin, G.R.
Abstract:Mutations inactivating the potassium channel KCNQ4 (K(v)7.4) lead to deafness in humans and mice. In addition to its expression in mechanosensitive hair cells of the inner ear, KCNQ4 is found in the auditory pathway and in trigeminal nuclei that convey somatosensory information. We have now detected KCNQ4 in the peripheral nerve endings of cutaneous rapidly adapting hair follicle and Meissner corpuscle mechanoreceptors from mice and humans. Electrophysiological recordings from single afferents from Kcnq4(-/-) mice and mice carrying a KCNQ4 mutation found in DFNA2-type monogenic dominant human hearing loss showed elevated mechanosensitivity and altered frequency response of rapidly adapting, but not of slowly adapting nor of D-hair, mechanoreceptor neurons. Human subjects from independent DFNA2 pedigrees outperformed age-matched control subjects when tested for vibrotactile acuity at low frequencies. This work describes a gene mutation that modulates touch sensitivity in mice and humans and establishes KCNQ4 as a specific molecular marker for rapidly adapting Meissner and a subset of hair follicle afferents.
Keywords:Hearing Loss, KCNQ Potassium Channels, Mechanoreceptors, Mutation, Sensory Thresholds, Touch, Touch Perception, Animals, Mice
Source:Nature Neuroscience
Publisher:Nature Publishing Group
Page Range:138-145
Official Publication:https://doi.org/10.1038/nn.2985
PubMed:View item in PubMed

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