ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2011
Onset of cholinergic efferent synaptic function in sensory hair cells of the rat cochlea.
Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 59 papers.
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Who cites it
59 citing papers in PubMed, 79 citations in OpenAlex.
- Impaired Development of the Medial Olivocochlear System in a KCNQ4-Deficient Mouse Model.Molecular neurobiology · 2026Article
- Patterned pre-sensory spontaneous activity drives the structural refinement of developing cochlear ribbon synapses.Frontiers in synaptic neuroscience · 2026Article
- Co-release of GABA and ACh from Medial Olivocochlear Neurons as a Fine Regulatory Mechanism of Cochlear Efferent Inhibition.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Article
- Strengthening Medial Olivocochlear Feedback Reduces the Developmental Impact of Early Noise Exposure.The Journal of neuroscience : the official journal of the Society for Neuroscience · 2025Article
- Taperin bundles F-actin at stereocilia pivot points enabling optimal lifelong mechanosensitivity.The Journal of cell biology · 2025Article
- Strengthening Medial Olivocochlear Feedback Reduces the Developmental Impact of Early Noise Exposure.bioRxiv : the preprint server for biology · 2025Article
- Virally mediated enhancement of efferent inhibition reduces acoustic trauma in wild-type murine cochleas.Molecular therapy. Methods & clinical development · 2025Article
- Mechanisms driving the functional maturation of the developing mammalian auditory pathway.Current topics in developmental biology · 2025Review
- In vivo AAV9-Myo7a gene rescue restores hearing and cholinergic efferent innervation in inner hair cells.JCI insight · 2024Article
- Co-release of GABA and ACh from medial olivocochlear neurons fine tunes cochlear efferent inhibition.bioRxiv : the preprint server for biology · 2024Article
- Priming central sound processing circuits through induction of spontaneous activity in the cochlea before hearing onset.Trends in neurosciences · 2024Review
- Cholinergic modulation in the vertebrate auditory pathway.Frontiers in cellular neuroscience · 2024Review
- Engineering olivocochlear inhibition to reduce acoustic trauma.Molecular therapy. Methods & clinical development · 2023Article
- Diverse identities and sites of action of cochlear neurotransmitters.Hearing research · 2022Review
- Review
- Sex difference in the efferent inner hair cell synapses of the aging murine cochlea.Hearing research · 2021Article
- Cy3-RgIA-5727 Labels and Inhibits α9-Containing nAChRs of Cochlear Hair Cells.Frontiers in cellular neuroscience · 2021Article
- SK Current, Expressed During the Development and Regeneration of Chick Hair Cells, Contributes to the Patterning of Spontaneous Action Potentials.Frontiers in cellular neuroscience · 2021Article
- Characterization of HA-tagged α9 and α10 nAChRs in the mouse cochlea.Scientific reports · 2020Article
- Nicotine evoked efferent transmitter release onto immature cochlear inner hair cells.Journal of neurophysiology · 2020Article
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Authors and funding
5 authors at 4 institutions in 1 country.
Funding
Abstract
In the developing mammalian cochlea, the sensory hair cells receive efferent innervation originating in the superior olivary complex. This input is mediated by α9/α10 nicotinic acetylcholine receptors (nAChRs) and is inhibitory due to the subsequent activation of calcium-dependent SK2 potassium channels. We examined the acquisition of this cholinergic efferent input using whole-cell voltage-clamp recordings from inner hair cells (IHCs) in acutely excised apical turns of the rat cochlea from embryonic day 21 to postnatal day 8 (P8). Responses to 1 mm acetylcholine (ACh) were detected from P0 on in almost every IHC. The ACh-activated current amplitude increased with age and demonstrated the same pharmacology as α9-containing nAChRs. Interestingly, at P0, the ACh response was not coupled to SK2 channels, so that the initial cholinergic response was excitatory and could trigger action potentials in IHCs. Coupling to SK current was detected earliest at P1 in a subset of IHCs and by P3 in every IHC studied. Clustered nAChRs and SK2 channels were found on IHCs from P1 on using Alexa Fluor 488 conjugated α-bungarotoxin and SK2 immunohistochemistry. The number of nAChRs clusters increased with age to 16 per IHC at P8. Cholinergic efferent synaptic currents first appeared in a subset of IHCs at P1 and by P3 in every IHC studied, contemporaneously with ACh-evoked SK currents, suggesting that SK2 channels may be necessary at onset of synaptic function. An analogous pattern of development was observed for the efferent synapses that form later (P6-P8) on outer hair cells in the basal cochlea.
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