Evidence map›Paper›PMID 34806649›Full record

ArticleJCI insight2021

Growth factors with valproic acid restore injury-impaired hearing by promoting neuronal regeneration.

Takahiro Wakizono, Hideyuki Nakashima, Tetsuro Yasui, Teppei Noda, Kei Aoyagi, Kanako Okada, Yasuhiro Yamada, Takashi Nakagawa, Kinichi Nakashima

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 11 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
11citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 20% 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

11 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.

  1. Pooled it
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  5. Review
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  11. Application of New Materials in Auditory Disease Treatment.Frontiers in cellular neuroscience · 2021
    Review
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

9 authors at 2 institutions in 1 country.

Takahiro WakizonoDepartment of Stem Cell Biology and Medicine and.
Hideyuki NakashimaDepartment of Stem Cell Biology and Medicine and.
Tetsuro YasuiDepartment of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan.
Teppei NodaDepartment of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan.
Kei AoyagiDepartment of Stem Cell Biology and Medicine and.
Kanako OkadaDepartment of Stem Cell Biology and Medicine and.
Yasuhiro YamadaDivision of Stem Cell Pathology, Center for Experimental Medicine and Systems Biology, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan.
Takashi NakagawaDepartment of Otorhinolaryngology, Graduate School of Medical Sciences, Kyushu University, Higashi-ku, Fukuoka, Japan.
Kinichi NakashimaDepartment of Stem Cell Biology and Medicine and.
Kyushu University · JPSystems Biology Institute · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Spiral ganglion neurons (SGNs) are primary auditory neurons in the spiral ganglion that transmit sound information from the inner ear to the brain and play an important role in hearing. Impairment of SGNs causes sensorineural hearing loss (SNHL), and it has been thought until now that SGNs cannot be regenerated once lost. Furthermore, no fundamental therapeutic strategy for SNHL has been established other than inserting devices such as hearing aids and cochlear implants. Here we show that the mouse spiral ganglion contains cells that are able to proliferate and indeed differentiate into neurons in response to injury. We suggest that SRY-box transcription factor 2/SRY-box transcription factor 10-double-positive (Sox2/Sox10-double-positive) Schwann cells sequentially started to proliferate, lost Sox10 expression, and became neurons, although the number of new neurons generated spontaneously was very small. To increase the abundance of new neurons, we treated mice with 2 growth factors in combination with valproic acid, which is known to promote neuronal differentiation and survival. This treatment resulted in a dramatic increase in the number of SGNs, accompanied by a partial recovery of the hearing loss induced by injury. Taken together, our findings offer a step toward developing strategies for treatment of SNHL.

Indexed as

AnimalsHearing LossHumansMiceNeuronsRegenerationValproic AcidValproic AcidAdult stem cellsNeuronal stem cellsNeuroscienceStem cells

Identifiers

PMID34806649
PMCPMC8663787
OpenAlexW3217194058

What OpenQuestion holds

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LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.