Characterization of the Expression and Role of Striatin-Interacting Protein 2 in Mouse Cochlea.

IF 1.9 3区 医学 Q3 CLINICAL NEUROLOGY
Otology & Neurotology Pub Date : 2025-04-01 Epub Date: 2025-02-14 DOI:10.1097/MAO.0000000000004449
Siyu Li, Yue Qiu, Ao Li, Jie Lu, Xinya Ji, Wenli Hao, Cheng Cheng, Xia Gao
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引用次数: 0

Abstract

Hypothesis: In this study, we aimed to examine the cochlear expression pattern and function of Striatin-interacting protein 2 (STRIP2) by using animal models.

Background: Sensorineural hearing loss often results from genetic defects in hair cell (HC) development and function. STRIP2 is a part of the striatin-interacting phosphatase and kinase (STRIPAK) complex, which plays important regulatory roles in cell fate determination, proliferation, cytoskeletal organization, and cell morphology. A recent study revealed Strip2 as the candidate gene that regulates positive selection in HC lineages. However, its role in the inner ear has not been identified.

Methods: Strip2 knockout mouse model was used to examine the cochlear expression pattern and function of STRIP2. Auditory brainstem response test was used to evaluate the hearing function of mice. Immunostaining and scanning electron microscope were used to study hair cells, synapses, and stereocilia of cochlea.

Results: Immunostaining showed that cytoplasmic STRIP2 expression in hair cells increased from postnatal day (P) 3 to P14. Despite having normal hearing thresholds, hair cell numbers, and stereocilia morphology until P90, the deletion of Strip2 resulted in a mild reduction in ribbon synapse density, suggesting a late onset of cochlear synaptic defects.

Conclusion: Our results revealed that STRIP2 was abundantly expressed in hair cells; however, the hearing function of Strip2-/- mice was comparable to that of control mice until P90, and a mild decrease in ribbon synapse number was detected at P60 and P90. Further studies on STRIP2 and its associated complexes will provide new insights into the pathways involved in inner ear development and function.

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来源期刊
Otology & Neurotology
Otology & Neurotology 医学-耳鼻喉科学
CiteScore
3.80
自引率
14.30%
发文量
509
审稿时长
3-6 weeks
期刊介绍: ​​​​​Otology & Neurotology publishes original articles relating to both clinical and basic science aspects of otology, neurotology, and cranial base surgery. As the foremost journal in its field, it has become the favored place for publishing the best of new science relating to the human ear and its diseases. The broadly international character of its contributing authors, editorial board, and readership provides the Journal its decidedly global perspective.
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