A BK channel-targeted peptide induces age-dependent improvement in behavioral and neural sound representation
| Autor: | Bo Ding, Luisa L. Scott, Xiaoxia Zhu, Joseph P. Walton, Elliott J. Brecht |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
BK channel
Aging Hearing loss Gene Expression Mice Hearing Mesencephalon medicine Extracellular Animals Large-Conductance Calcium-Activated Potassium Channels Molecular Targeted Therapy Acoustic reflex Ion channel Neurons biology medicine.diagnostic_test Behavior Animal General Neuroscience Presbycusis Reflex Acoustic biology.protein Excitatory postsynaptic potential Auditory Perception Evoked Potentials Auditory Intercellular Signaling Peptides and Proteins Neurology (clinical) Geriatrics and Gerontology Audiometry Tonotopy medicine.symptom Neuroscience Developmental Biology |
| Zdroj: | Neurobiology of aging. 110 |
| ISSN: | 1558-1497 |
| Popis: | Recent evidence suggests that modulation of the large-conductance, calcium-activated potassium (BK) channel regulates auditory processing in the brain. Because ion channel expression often changes during aging, this could be a factor in age-related hearing loss. The current study explored how the novel BK channel modulator LS3 shapes central auditory processing in young and old adult mice. In vivo extracellular recordings in the auditory midbrain demonstrated that LS3 differentially modulates neural processing along the tonotopic axis. Though sound-evoked activity was reduced in the mid and ventral tonotopic regions, LS3 enhanced excitatory drive and sound-evoked responses for some neurons in the dorsal, low-frequency region. Behavioral assessment using acoustic reflex modification audiometry indicated improved tone salience following systemic LS3 administration. Moderation of these responses with aging correlated with an age-related decline in BK channel expression. These findings suggest that targeting the BK channel enhances responsivity to tonal sounds, providing the potential to improve hearing acuity and treat hearing loss. |
| Databáze: | OpenAIRE |
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