2005 Fiscal Year Final Research Report Summary
Patch clamp recordings from the inner hair cell in hemi-cochlea
| Project/Area Number |
16591717
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Otorhinolaryngology
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| Research Institution | University of Miyazaki |
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Principal Investigator |
MATSUDA Keiji University of Miyazaki, Faculty of Medicine, Assistant, 医学部, 助手 (40253835)
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| Co-Investigator(Kenkyū-buntansha) |
KAWANO Hirokazu University of Miyazaki, Faculty of Medicine, Associate Prof., 医学部, 講師 (20204745)
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| Project Period (FY) |
2004 – 2005
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| Keywords | hair cell / intact cochlea / potassium current / electrophysiology / patch-clump / potassium currents |
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| Research Abstract |
The hemi-cochlear technique has greatly facilitated the investigation of the proportional contributions of two different mechanisms in cochlear amplification, somatic motility by outer hair cells (OHCs) and hair bundle motor derived from stereocilia. We tried to take whole cell recordings from inner hair cells (IHCs) in hemi-cochlea. However, it was too tough to get giga-ohm seal formation from IHCs. Instead of hemi-cochlea, we measured potassium currents from isolated guinea pig IHCs. We showed that TEA-dependent potassium current from IHCs possess the kinetics of fast inactivation. Some enzymes using for IHCs dissociation affect these inactivation kinetics. In addition, we reviewed another mechanism of cochlear amplification, or somatic motility of OHC. We also mentioned possible clinical manifestation of prestin-caused hearing loss.
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Research Products
(6 results)
