Authors: Sang Jae Cho Ji Hyun Jeon Do Ill Chun Sang Won Yeo InBeom Kim
Publish Date: 2014/05/23
Volume: 357, Issue: 3, Pages: 563-569
Abstract
Calciumactivated chloride channels CaCCs are involved in numerous physiological functions including the epithelial movement of fluid Anoctamin 1 ANO1 has recently been cloned and characterized as a CaCC and is known to be expressed in various secretory epithelia and in nervous tissues such as the dorsal root ganglia and retina However data regarding the expression function and cellular and subcellular localization of CaCCs in the brain are still limited We investigated the distribution and expression patterns of ANO1 in adult mouse brain Reverse transcriptase plus the polymerase chain reaction Western blot and immunohistochemical analyses demonstrated that ANO1 was widely distributed throughout the brain Furthermore ANO1 was strongly expressed in two auditory brainstem nuclei the medial nucleus of the trapezoid body MNTB and the anteroventral cochlear nucleus AVCN Doublelabeling experiments revealed that this ANO1 expression was exclusive to the presynaptic endings of both the MNTB and AVCN ANO1 is thus mainly localized at presynaptic terminals in various brain regions specifically in two auditory brainstem nuclei the MNTB and AVCN and might therefore contribute to the highfrequency synaptic transmission of auditory signals
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