Serum Prestin After Ototoxin Exposure Is Not Dependent on Outer Hair Cell Loss
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View abstract on PubMed
Summary
This summary is machine-generated.Cyclodextrin (CDX) causes a serum prestin increase independent of outer hair cell (OHC) loss. This N-glycosylated prestin burst may serve as an early ototoxicity biomarker for intervention.
Area Of Science
- Ototoxicity research
- Biomarker discovery
- Auditory neuroscience
Background
- Serum prestin is a potential biomarker for ototoxicity.
- Previous studies introduced a cyclodextrin (CDX) ototoxicity model.
- Further characterization of serum prestin in this model is needed.
Purpose Of The Study
- To investigate the relationship between CDX-induced serum prestin changes and outer hair cell (OHC) loss.
- To characterize the nature of the serum prestin burst.
- To evaluate serum prestin as an early biomarker for ototoxicity.
Main Methods
- Guinea pigs were administered varying doses of CDX (750, 3,000, 4,000 mg/kg).
- Serum prestin levels were quantified using automated Western analysis over 15 weeks.
- Hair cell counts were performed to assess OHC damage.
Main Results
- All CDX doses induced an N-glycosylated ~134-kDa prestin burst.
- Significant OHC loss was observed only at higher CDX doses (3,000 and 4,000 mg/kg).
- Serum prestin returned to baseline levels and remained stable even with OHC loss.
Conclusions
- The CDX-induced ~134-kDa prestin burst is a post-translationally modified, N-glycosylated form of prestin.
- Serum prestin is a promising biomarker for ototoxicity, as its elevation is not contingent on OHC loss.
- This finding allows for early detection and intervention of ototoxicity.
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