Abstract
Stria vascularis of the mammalian cochlea transports K+ to establish the electrochemical property in the endolymph crucial for hearing. This epithelial tissue also transports various small molecules. To clarify the profile of proteins participating in the transport system in the stria vascularis, membrane components purified from the stria of adult rats were analysed by liquid chromatography tandem mass spectrometry. Of the 3236 proteins detected in the analysis, 1807 were membrane proteins. Ingenuity Knowledge Base and literature data identified 513 proteins as being expressed on the 'plasma membrane', these included 25 ion channels and 79 transporters. Sixteen of the former and 62 of the latter had not yet been identified in the stria. Unexpectedly, many Cl- and Ca2+ transport systems were found, suggesting that the dynamics of these ions play multiple roles. Several transporters for organic substances were also detected. Network analysis demonstrated that a few kinases, including protein kinase A, and Ca2+ were key regulators for the strial transports. In the library of channels and transporters, 19 new candidates for uncloned deafness-related genes were identified. These resources provide a platform for understanding the molecular mechanisms underlying the epithelial transport essential for cochlear function and the pathophysiological processes involved in hearing disorders.
| Original language | English |
|---|---|
| Pages (from-to) | 1984-2002 |
| Number of pages | 19 |
| Journal | European Journal of Neuroscience |
| Volume | 42 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Aug 1 2015 |
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All Science Journal Classification (ASJC) codes
- Neuroscience(all)
Cite this
Molecular architecture of the stria vascularis membrane transport system, which is essential for physiological functions of the mammalian cochlea. / Uetsuka, Satoru; Ogata, Genki; Nagamori, Shushi; Isozumi, Noriyoshi; Nin, Fumiaki; Yoshida, Takamasa; Komune, Shizuo; Kitahara, Tadashi; Kikkawa, Yoshiaki; Inohara, Hidenori; Kanai, Yoshikatsu; Hibino, Hirosh.
In: European Journal of Neuroscience, Vol. 42, No. 3, 01.08.2015, p. 1984-2002.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Molecular architecture of the stria vascularis membrane transport system, which is essential for physiological functions of the mammalian cochlea
AU - Uetsuka, Satoru
AU - Ogata, Genki
AU - Nagamori, Shushi
AU - Isozumi, Noriyoshi
AU - Nin, Fumiaki
AU - Yoshida, Takamasa
AU - Komune, Shizuo
AU - Kitahara, Tadashi
AU - Kikkawa, Yoshiaki
AU - Inohara, Hidenori
AU - Kanai, Yoshikatsu
AU - Hibino, Hirosh
PY - 2015/8/1
Y1 - 2015/8/1
N2 - Stria vascularis of the mammalian cochlea transports K+ to establish the electrochemical property in the endolymph crucial for hearing. This epithelial tissue also transports various small molecules. To clarify the profile of proteins participating in the transport system in the stria vascularis, membrane components purified from the stria of adult rats were analysed by liquid chromatography tandem mass spectrometry. Of the 3236 proteins detected in the analysis, 1807 were membrane proteins. Ingenuity Knowledge Base and literature data identified 513 proteins as being expressed on the 'plasma membrane', these included 25 ion channels and 79 transporters. Sixteen of the former and 62 of the latter had not yet been identified in the stria. Unexpectedly, many Cl- and Ca2+ transport systems were found, suggesting that the dynamics of these ions play multiple roles. Several transporters for organic substances were also detected. Network analysis demonstrated that a few kinases, including protein kinase A, and Ca2+ were key regulators for the strial transports. In the library of channels and transporters, 19 new candidates for uncloned deafness-related genes were identified. These resources provide a platform for understanding the molecular mechanisms underlying the epithelial transport essential for cochlear function and the pathophysiological processes involved in hearing disorders.
AB - Stria vascularis of the mammalian cochlea transports K+ to establish the electrochemical property in the endolymph crucial for hearing. This epithelial tissue also transports various small molecules. To clarify the profile of proteins participating in the transport system in the stria vascularis, membrane components purified from the stria of adult rats were analysed by liquid chromatography tandem mass spectrometry. Of the 3236 proteins detected in the analysis, 1807 were membrane proteins. Ingenuity Knowledge Base and literature data identified 513 proteins as being expressed on the 'plasma membrane', these included 25 ion channels and 79 transporters. Sixteen of the former and 62 of the latter had not yet been identified in the stria. Unexpectedly, many Cl- and Ca2+ transport systems were found, suggesting that the dynamics of these ions play multiple roles. Several transporters for organic substances were also detected. Network analysis demonstrated that a few kinases, including protein kinase A, and Ca2+ were key regulators for the strial transports. In the library of channels and transporters, 19 new candidates for uncloned deafness-related genes were identified. These resources provide a platform for understanding the molecular mechanisms underlying the epithelial transport essential for cochlear function and the pathophysiological processes involved in hearing disorders.
UR - http://www.scopus.com/inward/record.url?scp=84938289147&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84938289147&partnerID=8YFLogxK
U2 - 10.1111/ejn.12973
DO - 10.1111/ejn.12973
M3 - Article
C2 - 26060893
AN - SCOPUS:84938289147
VL - 42
SP - 1984
EP - 2002
JO - European Journal of Neuroscience
JF - European Journal of Neuroscience
SN - 0953-816X
IS - 3
ER -