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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2020.1
- 수록면
- 344 - 355 (12page)
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초록· 키워드
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Kv3 family K+ channels, by ensuring speedy repolarization of action potential, enable rapid and high frequency neuronal firing and high precision temporal coding of auditory information in various auditory synapses in the brain. Expression of different Kv3 subtypes within the auditory end organ has been reported. Yet, their precise role at the hair cell synaptic transmission has not been fully elucidated. Using immunolabeling and confocal microscopy we examined the expression pattern of different Kv3 family K+ channel subunits in the nerve fibers innervating the cochlear hair cells. Kv3.1b was found in NKA-positive type 1 afferent fibers, exhibiting high signal intensity at the cell body, the unmyelinated dendritic segment, first heminode and nodes of Ranvier. Kv3.3 signal was detected in the cell body and the unmyelinated dendritic segment of NKA-positive type 1 afferent fibers but not in peripherin-positive type 2 afferent. Kv3.4 was found in ChAT-positive LOC and MOC efferent fibers as well as peripherin-positive type 2 afferent fibers. Such segregated expression pattern implies that each Kv3 subunits participate in different auditory tasks, for example, Kv3.1b and Kv3.3 in ascending signaling while Kv3.4 in feedback upon loud noise exposure.
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참고문헌 (64)
참고문헌 신청
Rudy B / 2001 / Kv3 channels : voltage-gated K+channels designed for high-frequency repetitive firing / Trends Neurosci 24:517~526
Kaczmarek LK / 2017 / Kv3 channels : enablers of rapid firing, neurotransmitter release, and neuronal endurance / Physiol Rev 97:1431~1468
Trussell LO / 1997 / Cellular mechanisms for preservation of timing in central auditory pathways / Curr Opin Neurobiol 7:487~492
Spirou GA / 1990 / Recordings from cat trapezoid body and HRP labeling of globular bushy cell axons / J Neurophysiol 63:1169~1190
Smith PH / 1991 / Projections of physiologically characterized globular bushy cell axons from the cochlear nucleus of the cat / J Comp Neurol 304:387~407
Kaczmarek LK / 2017 / Kv3 channels : enablers of rapid firing, neurotransmitter release, and neuronal endurance / Physiol Rev 97:1431~1468
Trussell LO / 1997 / Cellular mechanisms for preservation of timing in central auditory pathways / Curr Opin Neurobiol 7:487~492
Spirou GA / 1990 / Recordings from cat trapezoid body and HRP labeling of globular bushy cell axons / J Neurophysiol 63:1169~1190
Smith PH / 1991 / Projections of physiologically characterized globular bushy cell axons from the cochlear nucleus of the cat / J Comp Neurol 304:387~407
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