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Updated: Aug 12, 2026
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Stereotactically-guided Ablation of the Rat Auditory Cortex, and Localization of the Lesion in the Brain
Published on: October 11, 2017
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Lmod3 ablation disrupts auditory function without compromising hair cell stereocilia development or MET competence
Haibo Du1, Xi Huang2, Sun Yixiao2
1Air Characteristic Medical Center Affiliated to PLA Air Force Military Medical University, Beijing, 100142, China; Shandong Provincial Key Laboratory of Animal Cells and Developmental Biology, Shandong University School of Life Sciences, Qingdao, Shandong, 266237, China.
Biochimie
|December 14, 2025
Summary
This study found that LMOD3 is crucial for hearing. Knocking out LMOD3 in mice causes significant hearing loss by impairing outer hair cell function and cochlear amplification.
Area of Science:
- Cell Biology
- Auditory Neuroscience
- Molecular Biology
Background:
- The F-actin cytoskeleton is vital for hair cell function.
- Outer hair cells (OHCs) are critical for hearing by providing cochlear amplification.
Purpose of the Study:
- To investigate the role of LMOD3, an F-actin nucleator, in auditory function.
- To determine the specific contribution of LMOD3 in outer hair cells.
Main Methods:
- Genetic knockout of Lmod3 in mice.
- Auditory brainstem response (ABR) threshold measurements.
- Distortion product otoacoustic emission (DPOAE) threshold measurements.
- Analysis of stereocilia morphology and mechanoelectrical transduction (MET).
Main Results:
- LMOD3 is specifically expressed in mouse outer hair cells (OHCs).
- Lmod3 knockout mice exhibited significant hearing loss (approx. 40 dB ABR threshold elevation).
- Stereocilia morphology and MET function remained intact in knockout mice.
- Phenotypic analysis suggests impaired OHC-based cochlear amplification.
Conclusions:
- LMOD3 is essential for normal auditory function.
- LMOD3 plays a critical role in outer hair cell function and cochlear amplification.
- LMOD3 deficiency leads to hearing impairment independent of structural or basic MET defects.
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