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Outer hair cell-specific prestin-CreERT2 knockin mouse lines
Jie Fang1, Wen-Cheng Zhang, Tetsuji Yamashita
1Department of Developmental Neurobiology, St. Jude Children's Research Hospital, Memphis, Tennessee 38105, USA.
Genesis (New York, N.Y. : 2000)
|September 29, 2011
Summary
Researchers developed two new mouse models for studying outer hair cells (OHCs) in the cochlea. These prestin-CreERT2 mouse lines enable precise genetic manipulation in OHCs, aiding hearing research.
Area of Science:
- Oto-genetics
- Molecular Biology
- Auditory Neuroscience
Background:
- Outer hair cells (OHCs) are vital for hearing sensitivity and frequency selectivity.
- Understanding OHC function requires specific genetic manipulation tools in mice.
- Prestin is a key motor protein in OHCs, essential for their function.
Purpose of the Study:
- To generate and validate novel mouse lines for inducible gene manipulation in OHCs.
- To establish tools for investigating OHC physiology and pathology.
- To facilitate in vivo studies of gene function within the cochlea.
Main Methods:
- Generation of two prestin-CreERT2 knockin mouse lines (prestin-CreERT2 and prestin-CreERT2-NN).
- Inducible Cre activity assessment via crossing with reporter lines (CAG-eGFP, Ai6) and tamoxifen induction.
- Auditory function evaluation of the generated mouse lines.
Main Results:
- Both prestin-CreERT2 mouse lines exhibited tamoxifen-inducible Cre activity exclusively in OHCs.
- The Cre activity pattern mirrored endogenous prestin expression.
- Mice carrying the prestin-CreERT2 alleles showed normal hearing thresholds.
Conclusions:
- The developed prestin-CreERT2 and prestin-CreERT2-NN mouse lines are effective tools for OHC-specific gene manipulation.
- These models will advance research into OHC function, dysfunction, and hearing disorders.
- The tools allow for precise temporal and spatial control of gene expression in OHCs.
