How Usher-1 proteins in inner-ear hair cells affect hearing
Official title: Significance of Usher Protein Dynamics in Hair Cell Function and Deafness
Funded at West Virginia University · NIH-11233313 · Data updated 2026-11-12
This project looks at how key Usher-1 proteins help tiny hair cells in the inner ear work and how problems in these proteins lead to inherited hearing and vision loss for people with Usher syndrome.
Quick facts
| Grant type | R01 grant |
|---|---|
| Study type | NIH-funded research |
| Funding institution | West Virginia University NIH-funded |
| Lab location | 1 site (Morgantown, United States) |
| Project start | December 1, 2024 |
| Project end | November 30, 2029 |
| Funding year | 2026 |
| Award (this year) | $433,241 |
| NIH project number | 5R01DC021696-02 |
| Project ID | NIH-11233313 on NIH RePORTER |
Who could benefit from this research
✓Could help
People with Usher syndrome type 1 or known mutations in USH1 genes (for example MYO7A, USH1C, USH1G) and their families may be most interested in following this work or participating in related future studies.
✕Less likely to help
Individuals with non-genetic hearing loss (for example age-related or noise-induced hearing loss) are less likely to benefit directly from this basic lab-focused research.
What this research studies
Researchers will study three Usher-1 proteins—myosin-7a, sans, and harmonin-b—that sit at the tips of hair cell stereocilia and help control hearing. Using purified proteins, biochemical assays, high-resolution microscopy, and cellular or animal models, they will watch how these proteins travel along actin, assemble into complexes, and form the upper tip link density. They will also test how disease-causing mutations change transport and assembly behavior. The lab-based work aims to connect molecular defects to the loss of hair cell function that causes deafness in Usher syndrome.
Why it matters
Potential benefit: If successful, the findings could point to specific molecular targets or strategies for future therapies, diagnostics, or gene-correction approaches for inherited deafness such as Usher syndrome.
How similar studies have gone: Previous laboratory studies have established roles for myosin-7a and harmonin in hair cells and shown aspects of transport and phase behavior, but the proposed co-assembly and transport mechanism is a novel direction with limited direct clinical translation so far.
Where this research is happening
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West Virginia University
Morgantown, United States Active
Researchers
- Principal investigator: Liu, Rong — West Virginia University
- Study coordinator: Liu, Rong
Related research
Other NIH-funded projects on the same topics.
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How microtubules help inner-ear hair cells develop and prevent deafness
Researchers are looking at how a gene called Cep85l helps inner-ear hair cells build the tiny bundles needed for hearing, which could explain some inherited hearing loss.
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Gene therapy approach to Usher syndrome type 1F using compact PCDH15 in the inner ear
A researcher team is developing a compact gene therapy using specially designed PCDH15 pieces delivered by AAV to the inner ear to help people with Usher syndrome type 1F.
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New genes for early-onset hearing loss and precision medicine
Researchers are trying to identify genetic causes of hearing loss present at birth or in early childhood to enable earlier, DNA-based diagnoses and future gene-based therapies.
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Optimizing how CI users hear in busy real-world environments
This grant studies how to improve speech understanding and spatial hearing for people using cochlear implants, especially those with implants in both ears or with single-sided deafness.
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Improving genetic testing for hearing loss
This project works to make genetic test results clearer and more useful for people with inherited hearing loss.
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CRISPR-based exon-skipping to treat Usher syndrome deafness
A gene-editing approach using CRISPR techniques to fix faulty exon regions in Usher syndrome patients to protect hearing and balance functions.
About this research
- This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
- Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
- For full project details, budget, and progress reports, visit the official NIH RePORTER page.