How Sound Exposure Affects Gentamicin Uptake in Cochlear Hair Cells
Author Information
Author(s): Li Hongzhe, Wang Qi, Steyger Peter S.
Primary Institution: Oregon Health and Science University
Hypothesis
Sound exposure enhances the intra-cochlear trafficking of aminoglycosides, such as gentamicin, leading to increased hair cell uptake of aminoglycosides and subsequent ototoxicity.
Conclusion
Prolonged, moderate sound exposures enhanced intra-cochlear aminoglycoside trafficking into the stria vascularis and hair cells.
Supporting Evidence
- Prolonged sound exposure increased gentamicin uptake by cochlear hair cells.
- Enhanced intra-cochlear trafficking and hair cell uptake of gentamicin occurred even when sound and drug exposure were temporally separated.
- Acute, concurrent sound exposure did not increase cochlear uptake of aminoglycosides.
Takeaway
Loud sounds can make it easier for certain medicines to get into the tiny hair cells in our ears, which can cause hearing problems.
Methodology
Juvenile C57Bl/6 mice were exposed to sound while receiving gentamicin, and drug uptake was examined in cochlear tissues by confocal microscopy.
Limitations
The study was conducted on a specific mouse strain, which may not represent all populations.
Participant Demographics
Juvenile C57Bl/6 mice, aged 4-7 weeks.
Statistical Information
P-Value
p<0.001
Statistical Significance
p<0.001
Digital Object Identifier (DOI)
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