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AAV-ie enables safe and efficient gene transfer to inner ear cells
Fangzhi Tan1, Cenfeng Chu2,3,4, Jieyu Qi5,6
1iHuman Institute, ShanghaiTech University, 201210, Shanghai, China. tanfzh@shanghaitech.edu.cn.
Nature Communications
|August 21, 2019
Summary
Researchers developed a new Adeno-associated virus (AAV) variant, AAV-inner ear (AAV-ie), for gene therapy. This novel vector efficiently delivers genes to mouse inner ear cells, enabling hair cell regeneration for hearing loss treatment.
Area of Science:
- Otolaryngology
- Gene Therapy
- Regenerative Medicine
Background:
- Hearing loss is a prevalent sensory disorder, often stemming from genetic causes.
- Gene therapy offers a promising avenue for treating inherited hearing loss, but requires effective gene delivery vectors.
- Current Adeno-associated virus (AAV) vectors lack efficiency and specificity for targeting diverse inner ear cell types.
Purpose of the Study:
- To identify and characterize a novel Adeno-associated virus (AAV) variant for enhanced gene delivery within the mouse inner ear.
- To evaluate the efficacy of the identified AAV variant in transducing cochlear supporting cells (SCs).
- To investigate the potential of AAV-mediated gene transfer for hair cell (HC) regeneration.
Main Methods:
- Isolation and characterization of a novel AAV variant, designated AAV-inner ear (AAV-ie).
- Assessment of AAV-ie's transduction efficiency in mouse cochlear supporting cells (SCs).
- In vivo gene transfer of the Atoh1 gene using AAV-ie, followed by analysis of SCs' trans-differentiation into hair cells (HCs).
Main Results:
- AAV-ie demonstrated high transduction efficiency in mouse cochlear supporting cells (SCs), significantly outperforming conventional AAV serotypes.
- Atoh1 gene transfer mediated by AAV-ie successfully induced trans-differentiation of SCs into new hair cells (HCs).
- The study highlights AAV-ie's potential as a superior tool for cochlear gene therapy.
Conclusions:
- AAV-inner ear (AAV-ie) represents a significant advancement in Adeno-associated virus (AAV) vector technology for inner ear gene delivery.
- AAV-ie facilitates efficient gene transfer to cochlear supporting cells, paving the way for novel therapeutic strategies for hearing loss.
- This vector is valuable for both cochlear gene therapy and for elucidating mechanisms of hair cell regeneration.
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