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Updated: Apr 30, 2026
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Evaluation of Planar-Cell-Polarity Phenotypes in Ciliopathy Mouse Mutant Cochlea
Published on: February 21, 2016
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Changes in cochlear PMCA2 expression correlate with the maturation of auditory sensitivity.
Claire J Watson1, Sarah M Lies, Rebecca R Minich
1Department of Otolaryngology-Head and Neck Surgery, University of Washington, Box 356515, Seattle, WA, 98195, USA, cwalk1@uw.edu.
Summary
Plasma membrane Ca(2+) ATPase 2 (PMCA2) is crucial for hearing. This study reveals PMCA2 expression and auditory sensitivity mature together post-hearing onset, with potential regulation by noncoding RNAs.
Area of Science:
- Auditory Neuroscience
- Molecular Biology
- Genetics
Background:
- Plasma membrane Ca(2+) ATPase 2 (PMCA2) is essential for auditory transduction and calcium regulation in stereocilia.
- Previous research on PMCA2's role in hearing focused on adult mice, leaving developmental aspects understudied.
Purpose of the Study:
- To investigate the developmental changes in PMCA2 expression and auditory sensitivity from P16 into adulthood.
- To compare auditory responses, RNA, and protein levels in haploinsufficient PMCA2 and wild-type mice.
- To explore the potential role of long noncoding RNAs (lnc82, lnc83) in regulating PMCA2 expression.
Main Methods:
- Comparative analysis of auditory sensitivity thresholds in wild-type and PMCA2 haploinsufficient mice.
- Quantitative RNA analysis of α-Atp2b2 transcript levels in cochleae.
- Assessment of PMCA2 protein expression during auditory system development.
- Characterization of long noncoding RNA (lncRNA) expression (Gm15082, Gm15083).
Main Results:
- Auditory sensitivity matures in wild-type mice between P16 and 3 weeks, stabilizing thereafter.
- PMCA2 haploinsufficient mice exhibit frequency-dependent hearing loss and recovery.
- α-Atp2b2 transcript and PMCA2 protein levels increase in wild-type cochleae from P16 to 5 weeks.
- lncRNA Gm15083 may play a regulatory role in α-Atp2b2 expression.
Conclusions:
- PMCA2 expression and auditory sensitivity maturation are linked after hearing onset.
- Developmental changes in PMCA2 are critical for establishing mature auditory function.
- Long noncoding RNA Gm15083 is a potential regulator of PMCA2 during auditory development.
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