Authors: Shin Kikuchi Takafumi Ninomiya Tomoyuki Kawamata Haruyuki Tatsumi
Publish Date: 2008/06/17
Volume: 333, Issue: 2, Pages: 217-224
Abstract
Acidsensing ion channel 2 ASIC2 plays a role as a mechanorecptor and acid receptor in the peripheral and central nervous systems However several recent studies have suggested that ASIC2 is expressed in several organs in addition to the nervous system We have examined the expression and distribution of ASIC2 in rat ciliated cells trachea and oviduct and stereociliated cells epididymis Corti organ and ampullary crest by immunohistochemistry and transmission electron microscopy TEM Imunohistochemistry revealed that ASIC2 was expressed in both ciliated cells and stereociliated cells but the localization differed between these cell types In ciliated cells ASIC2 was coexpressed with a cilial marker acetylated tubulin In stereociliated cells stained with a stereocilial marker phalloidin ASIC2 was observed in the cell body Observation by TEM suggested that ASIC2 expression was present at the apical side of the cilial membrane in ciliated cells and at the apical side of the cell body in stereociliated cells This study thus indicates that the proton receptor ASIC2 is expressed in both ciliated and stereociliated cells
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