Differential expression of ryanodine receptor in the developing rat cochlea
Ryanodine receptors (RyRs) are one of the intracellular calcium channels involved in regulation of intracellular free calcium concentration ([Ca2+]i). The immunolocalization of RyRs was investigated in the developing rat cochlea at different postnatal days (PND). The change of [Ca2+]i in isolated ou...
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2009-12-01
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doaj-586b93c467d24897a4e4c17658c27d312020-11-25T03:17:04ZengPAGEPress PublicationsEuropean Journal of Histochemistry 1121-760X2038-83062009-12-01534e30e3010.4081/ejh.2009.e30983Differential expression of ryanodine receptor in the developing rat cochleaY. LiangL. HuangJ. YangRyanodine receptors (RyRs) are one of the intracellular calcium channels involved in regulation of intracellular free calcium concentration ([Ca2+]i). The immunolocalization of RyRs was investigated in the developing rat cochlea at different postnatal days (PND). The change of [Ca2+]i in isolated outer hair cells (OHCs) was determined. Morphological results showed low expression of RyRs in the Kolliker’s organ from the PND 5 group. RyR expression in inner hair cells (IHCs) increased as the rats aged, and was mature after PND 14. RyRs in OHCs were expressed near the synaptic area of afferent and efferent nerves. RyRs in supporting cells were expressed widely and strongly. The application of ACh, ryanodine + ACh, and thapsigargin + ACh could induce a significant increase in [Ca2+]i in OHCs in the presence of extracellular calcium. This increase of [Ca2+]i induced by ACh was caused by not only the calcium influx through surface calcium channels, but also the calciuminduced calcium release (CICR) from intracellular RyR-sensitive calcium stores. Morphological and Ca imaging results suggested that RyRs expression is related to cochlear maturity, and may play an important role in its function.http://www.ejh.it/index.php/ejh/article/view/1536ryanodine receptor, development of cochlea, Ca2+, calcium-induced calcium release. |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Y. Liang L. Huang J. Yang |
spellingShingle |
Y. Liang L. Huang J. Yang Differential expression of ryanodine receptor in the developing rat cochlea European Journal of Histochemistry ryanodine receptor, development of cochlea, Ca2+, calcium-induced calcium release. |
author_facet |
Y. Liang L. Huang J. Yang |
author_sort |
Y. Liang |
title |
Differential expression of ryanodine receptor in the developing rat cochlea |
title_short |
Differential expression of ryanodine receptor in the developing rat cochlea |
title_full |
Differential expression of ryanodine receptor in the developing rat cochlea |
title_fullStr |
Differential expression of ryanodine receptor in the developing rat cochlea |
title_full_unstemmed |
Differential expression of ryanodine receptor in the developing rat cochlea |
title_sort |
differential expression of ryanodine receptor in the developing rat cochlea |
publisher |
PAGEPress Publications |
series |
European Journal of Histochemistry |
issn |
1121-760X 2038-8306 |
publishDate |
2009-12-01 |
description |
Ryanodine receptors (RyRs) are one of the intracellular calcium channels involved in regulation of intracellular free calcium concentration ([Ca2+]i). The immunolocalization of RyRs was investigated in the developing rat cochlea at different postnatal days (PND). The change of [Ca2+]i in isolated outer hair cells (OHCs) was determined. Morphological results showed low expression of RyRs in the Kolliker’s organ from the PND 5 group. RyR expression in inner hair cells (IHCs) increased as the rats aged, and was mature after PND 14. RyRs in OHCs were expressed near the synaptic area of afferent and efferent nerves. RyRs in supporting cells were expressed widely and strongly. The application of ACh, ryanodine + ACh, and thapsigargin + ACh could induce a significant increase in [Ca2+]i in OHCs in the presence of extracellular calcium. This increase of [Ca2+]i induced by ACh was caused by not only the calcium influx through surface calcium channels, but also the calciuminduced calcium release (CICR) from intracellular RyR-sensitive calcium stores. Morphological and Ca imaging results suggested that RyRs expression is related to cochlear maturity, and may play an important role in its function. |
topic |
ryanodine receptor, development of cochlea, Ca2+, calcium-induced calcium release. |
url |
http://www.ejh.it/index.php/ejh/article/view/1536 |
work_keys_str_mv |
AT yliang differentialexpressionofryanodinereceptorinthedevelopingratcochlea AT lhuang differentialexpressionofryanodinereceptorinthedevelopingratcochlea AT jyang differentialexpressionofryanodinereceptorinthedevelopingratcochlea |
_version_ |
1724633540660822016 |