Hair-Cell Mechanotransduction Persists in TRP Channel Knockout Mice.
Hair-Cell Mechanotransduction Persists in TRP Channel Knockout Mice.
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DOI：
10.1371/journal.pone.0155577
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发表时间：
2016
期刊：
影响因子：
3.7
通讯作者：
Corey DP
中科院分区：
文献类型：
--
作者：
Wu X;Indzhykulian AA;Niksch PD;Webber RM;Garcia-Gonzalez M;Watnick T;Zhou J;Vollrath MA;Corey DP
Members of the TRP superfamily of ion channels mediate mechanosensation in some organisms, and have been suggested as candidates for the mechanotransduction channel in vertebrate hair cells. Some TRP channels can be ruled out based on lack of an inner ear phenotype in knockout animals or pore properties not similar to the hair-cell channel. Such studies have excluded Trpv4, Trpa1, Trpml3, Trpm1, Trpm3, Trpc1, Trpc3, Trpc5, and Trpc6. However, others remain reasonable candidates. We used data from an RNA-seq analysis of gene expression in hair cells as well as data on TRP channel conductance to narrow the candidate group. We then characterized mice lacking functional Trpm2, Pkd2, Pkd2l1, Pkd2l2 and Pkd1l3, using scanning electron microscopy, auditory brainstem response, permeant dye accumulation, and single-cell electrophysiology. In all of these TRP-deficient mice, and in double and triple knockouts, mechanotransduction persisted. Together with published studies, these results argue against the participation of any of the 33 mouse TRP channels in hair cell transduction.
