Evidence map›Paper›PMID 33373328›Full record

ArticleJCI insight2021

Trk agonist drugs rescue noise-induced hidden hearing loss.

Katharine A Fernandez, Takahisa Watabe, Mingjie Tong, Xiankai Meng, Kohsuke Tani, Sharon G Kujawa, Albert Sb Edge

Open access · goldAbstract read
In one paragraph

Article in JCI insight, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
1.6field-weighted citation impact, top 13% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

27 citing papers in PubMed, 35 citations in OpenAlex.

  1. Article
  2. Neural Hearing Loss: Mechanisms, Diagnosis and Treatment Horizons.Journal of the Association for Research in Otolaryngology : JARO · 2026
    Review
  3. Article
  4. Review
  5. Article
  6. Article
  7. Phenotypic changes of auditory nerve fibers after excitotoxicity.Proceedings of the National Academy of Sciences of the United States of America · 2025
    Article
  8. Review
  9. Article
  10. Auditory hair cells and spiral ganglion neurons regenerate synapses with refined release properties in vitro.Proceedings of the National Academy of Sciences of the United States of America · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. Review
  18. Noise-induced hearing disorders: Clinical and investigational tools.The Journal of the Acoustical Society of America · 2023
    Article
  19. Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 1 institution in 1 country.

Katharine A FernandezDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Takahisa WatabeDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Mingjie TongDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Xiankai MengDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Kohsuke TaniDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Sharon G KujawaDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Albert Sb EdgeDepartment of Otolaryngology, Harvard Medical School, Boston, Massachusetts, USA.
Massachusetts Eye and Ear Infirmary · US

Funding

Cellular therapy for the inner earR01DC007174 · NIDCD · MASSACHUSETTS EYE AND EAR INFIRMARY · PI EDGE, ALBERT · 2005 to 2017
$4.6M
NIDCD NIH HHS R01 DC007174
6 · The paper itself

Abstract

TrkB agonist drugs are shown here to have a significant effect on the regeneration of afferent cochlear synapses after noise-induced synaptopathy. The effects were consistent with regeneration of cochlear synapses that we observed in vitro after synaptic loss due to kainic acid-induced glutamate toxicity and were elicited by administration of TrkB agonists, amitriptyline, and 7,8-dihydroxyflavone, directly into the cochlea via the posterior semicircular canal 48 hours after exposure to noise. Synaptic counts at the inner hair cell and wave 1 amplitudes in the auditory brainstem response (ABR) were partially restored 2 weeks after drug treatment. Effects of amitriptyline on wave 1 amplitude and afferent auditory synapse numbers in noise-exposed ears after systemic (as opposed to local) delivery were profound and long-lasting; synapses in the treated animals remained intact 1 year after the treatment. However, the effect of systemically delivered amitriptyline on synaptic rescue was dependent on dose and the time window of administration: it was only effective when given before noise exposure at the highest injected dose. The long-lasting effect and the efficacy of postexposure treatment indicate a potential broad application for the treatment of synaptopathy, which often goes undetected until well after the original damaging exposures.

Indexed as

AmitriptylineAnimalsAuditory ThresholdCochleaCochlear NerveCoculture TechniquesDisease Models, AnimalEvoked Potentials, Auditory, Brain StemFlavonesHair Cells, Auditory, InnerHearing Loss, Noise-InducedMembrane GlycoproteinsMiceMice, Inbred CBAProtein-Tyrosine KinasesReceptor, trkB6,7-dihydroxyflavoneAmitriptylineFlavonesMembrane GlycoproteinsNtrk2 protein, mouseProtein-Tyrosine KinasesReceptor, trkBNeurodegenerationOtologySynapses

Identifiers

PMID33373328
PMCPMC7934864
OpenAlexW3114650255

What OpenQuestion holds

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.