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Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae
The calcium-sensing receptor (CaSR) is an extracellular Ca(2+) sensor that plays a critical role in maintaining Ca(2+) homeostasis in several organs, including the parathyroid gland and kidneys. In this study, through in situ hybridization, the expression of CaSR mRNA was found in the neuromasts of...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Frontiers Media S.A.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5988855/ https://www.ncbi.nlm.nih.gov/pubmed/29899708 http://dx.doi.org/10.3389/fphys.2018.00649 |
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author | Lin, Li-Yih Yeh, Ya-Hsin Hung, Giun-Yi Lin, Chia-Hao Hwang, Pung-Pung Horng, Jiun-Lin |
author_facet | Lin, Li-Yih Yeh, Ya-Hsin Hung, Giun-Yi Lin, Chia-Hao Hwang, Pung-Pung Horng, Jiun-Lin |
author_sort | Lin, Li-Yih |
collection | PubMed |
description | The calcium-sensing receptor (CaSR) is an extracellular Ca(2+) sensor that plays a critical role in maintaining Ca(2+) homeostasis in several organs, including the parathyroid gland and kidneys. In this study, through in situ hybridization, the expression of CaSR mRNA was found in the neuromasts of zebrafish larvae. Immunohistochemistry further demonstrated that the CaSR protein was present in neuromast hair cell stereocilia and basolateral membranes. Based on the expression and subcellular localization of the CaSR in hair cells, we hypothesized that the CaSR is expressed in zebrafish lateral-line hair cells to regulate mechanotransducer (MET)-channel-mediated Ca(2+) entry. Using the scanning ion-selective electrode technique, MET-channel-mediated Ca(2+) influx at the stereocilia of hair cells was measured in intact larvae. Ca(2+) influx was suppressed after larvae were pretreated with a CaSR activator (R-568) or high-Ca(2+) (HCa) medium. Gene knockdown by using morpholino oligonucleotides decreased CaSR expression in hair cells and eliminated the effects of R-568 and HCa on Ca(2+) influx. In addition, we found that treatment with R-568 attenuated neomycin-induced hair cell death. This study is the first to demonstrate that the CaSR is involved in mechanotransduction in zebrafish hair cells. |
format | Online Article Text |
id | pubmed-5988855 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-59888552018-06-13 Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae Lin, Li-Yih Yeh, Ya-Hsin Hung, Giun-Yi Lin, Chia-Hao Hwang, Pung-Pung Horng, Jiun-Lin Front Physiol Physiology The calcium-sensing receptor (CaSR) is an extracellular Ca(2+) sensor that plays a critical role in maintaining Ca(2+) homeostasis in several organs, including the parathyroid gland and kidneys. In this study, through in situ hybridization, the expression of CaSR mRNA was found in the neuromasts of zebrafish larvae. Immunohistochemistry further demonstrated that the CaSR protein was present in neuromast hair cell stereocilia and basolateral membranes. Based on the expression and subcellular localization of the CaSR in hair cells, we hypothesized that the CaSR is expressed in zebrafish lateral-line hair cells to regulate mechanotransducer (MET)-channel-mediated Ca(2+) entry. Using the scanning ion-selective electrode technique, MET-channel-mediated Ca(2+) influx at the stereocilia of hair cells was measured in intact larvae. Ca(2+) influx was suppressed after larvae were pretreated with a CaSR activator (R-568) or high-Ca(2+) (HCa) medium. Gene knockdown by using morpholino oligonucleotides decreased CaSR expression in hair cells and eliminated the effects of R-568 and HCa on Ca(2+) influx. In addition, we found that treatment with R-568 attenuated neomycin-induced hair cell death. This study is the first to demonstrate that the CaSR is involved in mechanotransduction in zebrafish hair cells. Frontiers Media S.A. 2018-05-30 /pmc/articles/PMC5988855/ /pubmed/29899708 http://dx.doi.org/10.3389/fphys.2018.00649 Text en Copyright © 2018 Lin, Yeh, Hung, Lin, Hwang and Horng. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Physiology Lin, Li-Yih Yeh, Ya-Hsin Hung, Giun-Yi Lin, Chia-Hao Hwang, Pung-Pung Horng, Jiun-Lin Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae |
title | Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae |
title_full | Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae |
title_fullStr | Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae |
title_full_unstemmed | Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae |
title_short | Role of Calcium-Sensing Receptor in Mechanotransducer-Channel-Mediated Ca(2+) Influx in Hair Cells of Zebrafish Larvae |
title_sort | role of calcium-sensing receptor in mechanotransducer-channel-mediated ca(2+) influx in hair cells of zebrafish larvae |
topic | Physiology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5988855/ https://www.ncbi.nlm.nih.gov/pubmed/29899708 http://dx.doi.org/10.3389/fphys.2018.00649 |
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