Comparison of isolated outer hair cells from five mammalian species

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چکیده

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Comparison of isolated outer hair cells from five mammalian species.

Live outer hair cells were isolated from guinea pig, chinchilla, rat, mouse, and gerbil. The organ of Corti from selected turns of the cochlea was briefly incubated with collagenase and outer hair cells were separated from the tissue by micromanipulation under microscopic observation. Morphological criteria for cell viability were: cylindrical cell shape without swelling or distortion of the me...

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Acetylcholine-induced phosphorylation in isolated outer hair cells.

Two groups of isolated, surviving outer hair cells (OHCs) of guinea pig cochleas (n = 20, for each group) were treated with 10 microM acetylcholine or acetylcholine plus strichnine (an alpha9 nAChR antagonist), respectively, under short-term tissue culture conditions. The protein content of the cell homogenates was separated by SDS-polyacrylamide gel electrophoresis, Western blotted and labelle...

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Furosemide alters nonlinear capacitance in isolated outer hair cells.

The outer hair cell (OHC) from the organ of Corti plays a crucial role in hearing through its unique voltage-dependent mechanical responses. Furosemide, one of the loop diuretics, disrupts normal cochlear function. Here we report on direct effects of furosemide on OHC motility-related, voltage-dependent capacitance using the whole-cell patch-clamp technique. Extracellularly applied furosemide r...

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Shape changes in isolated outer hair cells: with attached microspheres

Shape changes can be induced in isolated outer hair cells by various stimuli and quantified from digitized video-images. While overall changes in length between base and apex are easily measured, changes in defined segments of the cell require fixed landmarks on the cell body. The problem of locating such landmarks makes it difficult to assess if a change in length is uniform or largely confine...

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Reversible contraction of isolated mammalian cochlear hair cells

Outer hair cells were isolated from the guinea pig cochlea using a micromechanical non-enzymatic procedure. Depolarization of outer hair cells in the presence of 25-125 mM K+ was accompanied by a longitudinal contraction of the isolated cells. A decrease of [K+] to 5.4 mM interrupted contraction and induced a relaxation. Individual hair cells were able to undergo as many as 5 cycles of contract...

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ژورنال

عنوان ژورنال: Hearing Research

سال: 1987

ISSN: 0378-5955

DOI: 10.1016/0378-5955(87)90061-x