Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing
The G protein-coupled receptor (GPR) family critically regulates development and homeostasis of multiple organs. As a member of the GPR adhesion family, Gpr125 (Adgra3) modulates Wnt/PCP signaling and convergent extension in developing zebrafish, but whether it is essential for cochlear development...
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doaj-2626c18907ea46dfb7ce734b04475a392021-07-28T10:09:20ZengFrontiers Media S.A.Frontiers in Cell and Developmental Biology2296-634X2021-07-01910.3389/fcell.2021.690955690955Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and HearingHaiying Sun0Haiying Sun1Tian Wang2Patrick J. Atkinson3Sara E. Billings4Wuxing Dong5Alan G. Cheng6Department of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, United StatesDepartment of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, ChinaDepartment of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, United StatesDepartment of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, United StatesDepartment of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, United StatesDepartment of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, United StatesDepartment of Otolaryngology-Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, United StatesThe G protein-coupled receptor (GPR) family critically regulates development and homeostasis of multiple organs. As a member of the GPR adhesion family, Gpr125 (Adgra3) modulates Wnt/PCP signaling and convergent extension in developing zebrafish, but whether it is essential for cochlear development in mammals is unknown. Here, we examined the Gpr125lacZ/+ knock-in mice and show that Gpr125 is dynamically expressed in the developing and mature cochleae. From embryonic day (E) 15.5 to postnatal day (P) 30, Gpr125-β-Gal is consistently expressed in the lesser epithelial ridge and its presumed progenies, the supporting cell subtypes Claudius cells and Hensen’s cells. In contrast, Gpr125-β-Gal is expressed transiently in outer hair cells, epithelial cells in the lateral cochlear wall, interdental cells, and spiral ganglion neurons in the late embryonic and early postnatal cochlea. In situ hybridization for Gpr125 mRNA confirmed Gpr125 expression and validated loss of expression in Gpr125lacZ/lacZ cochleae. Lastly, Gpr125lacZ/+ and Gpr125lacZ/lacZ cochleae displayed no detectable loss or disorganization of either sensory or non-sensory cells in the embryonic and postnatal ages and exhibited normal auditory physiology. Together, our study reveals that Gpr125 is dynamically expressed in multiple cell types in the developing and mature cochlea and is dispensable for cochlear development and hearing.https://www.frontiersin.org/articles/10.3389/fcell.2021.690955/fullGpr125cochlealesser epithelial ridgehair cellspiral ganglion neurons |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Haiying Sun Haiying Sun Tian Wang Patrick J. Atkinson Sara E. Billings Wuxing Dong Alan G. Cheng |
spellingShingle |
Haiying Sun Haiying Sun Tian Wang Patrick J. Atkinson Sara E. Billings Wuxing Dong Alan G. Cheng Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing Frontiers in Cell and Developmental Biology Gpr125 cochlea lesser epithelial ridge hair cell spiral ganglion neurons |
author_facet |
Haiying Sun Haiying Sun Tian Wang Patrick J. Atkinson Sara E. Billings Wuxing Dong Alan G. Cheng |
author_sort |
Haiying Sun |
title |
Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing |
title_short |
Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing |
title_full |
Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing |
title_fullStr |
Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing |
title_full_unstemmed |
Gpr125 Marks Distinct Cochlear Cell Types and Is Dispensable for Cochlear Development and Hearing |
title_sort |
gpr125 marks distinct cochlear cell types and is dispensable for cochlear development and hearing |
publisher |
Frontiers Media S.A. |
series |
Frontiers in Cell and Developmental Biology |
issn |
2296-634X |
publishDate |
2021-07-01 |
description |
The G protein-coupled receptor (GPR) family critically regulates development and homeostasis of multiple organs. As a member of the GPR adhesion family, Gpr125 (Adgra3) modulates Wnt/PCP signaling and convergent extension in developing zebrafish, but whether it is essential for cochlear development in mammals is unknown. Here, we examined the Gpr125lacZ/+ knock-in mice and show that Gpr125 is dynamically expressed in the developing and mature cochleae. From embryonic day (E) 15.5 to postnatal day (P) 30, Gpr125-β-Gal is consistently expressed in the lesser epithelial ridge and its presumed progenies, the supporting cell subtypes Claudius cells and Hensen’s cells. In contrast, Gpr125-β-Gal is expressed transiently in outer hair cells, epithelial cells in the lateral cochlear wall, interdental cells, and spiral ganglion neurons in the late embryonic and early postnatal cochlea. In situ hybridization for Gpr125 mRNA confirmed Gpr125 expression and validated loss of expression in Gpr125lacZ/lacZ cochleae. Lastly, Gpr125lacZ/+ and Gpr125lacZ/lacZ cochleae displayed no detectable loss or disorganization of either sensory or non-sensory cells in the embryonic and postnatal ages and exhibited normal auditory physiology. Together, our study reveals that Gpr125 is dynamically expressed in multiple cell types in the developing and mature cochlea and is dispensable for cochlear development and hearing. |
topic |
Gpr125 cochlea lesser epithelial ridge hair cell spiral ganglion neurons |
url |
https://www.frontiersin.org/articles/10.3389/fcell.2021.690955/full |
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