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On the role of ephrinA2 in auditory function
Neil J Ingham1, Karen P Steel1, Uwe Drescher2
1Wolfson Centre for Age-Related Diseases, King's College London, Guy's Campus, London, SE1 1UL, United Kingdom.
Hearing Research
|April 10, 2017
Summary
Researchers could not replicate findings that the EphA/ephrinA system improves hearing. Loss of ephrinA2 alone does not impact auditory function in mice, suggesting functional redundancy within this gene family.
Area of Science:
- Neuroscience
- Genetics
- Auditory Science
Background:
- The EphA/ephrinA system is implicated in auditory system development and function.
- Previous research suggested manipulating this system could improve hearing sensitivity.
Purpose of the Study:
- To replicate findings on the EphA/ephrinA system's role in hearing.
- To investigate the specific role of ephrinA2 in auditory function.
Main Methods:
- Auditory brainstem evoked potential (ABR) recordings were performed.
- Experiments utilized ephrinA2 homozygous knockout mice and wildtype littermates.
Main Results:
- EphrinA2 knockout mice exhibited auditory threshold sensitivity comparable to wildtype littermates.
- Evoked potential wave amplitudes, latencies, and inter-peak intervals were similar between groups.
- The previously reported findings by Yates et al. (2014) could not be replicated.
Conclusions:
- The EphA/ephrinA system may be involved in cochlear innervation and auditory brainstem circuitry development.
- Functional redundancy exists within the EphA/ephrinA family.
- Loss of ephrinA2 function alone is insufficient to alter auditory function in mice.