Evidence map›Paper›PMID 19539019›Full record

ArticleHearing research2009

Localization and expression of clarin-1, the Clrn1 gene product, in auditory hair cells and photoreceptors.

Marisa Zallocchi, Daniel T Meehan, Duane Delimont, Charles Askew, Suneetha Garige, Michael Anne Gratton, Christie A Rothermund-Franklin, Dominic Cosgrove

Abstract read
In one paragraph

Article in Hearing research, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 37 papers.

0numbers the graph read from it
0cells of the map it votes in
37citing papers in PubMed
1.9field-weighted citation impact, top 15% 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

37 citing papers in PubMed, 49 citations in OpenAlex.

  1. Article
  2. Article
  3. Cochlear Implantation Outcomes in Genotyped Subjects with Sensorineural Hearing Loss.Journal of the Association for Research in Otolaryngology : JARO · 2025
    Article
  4. Article
  5. Review
  6. Review
  7. AAV-mediated rescue ofMolecular therapy. Methods & clinical development · 2022
    Article
  8. Review
  9. Article
  10. Novel Missense and Splice Site Mutations inFrontiers in genetics · 2022
    Article
  11. Article
  12. Usher Syndrome: Genetics of a Human Ciliopathy.International journal of molecular sciences · 2021
    Review
  13. Article
  14. Article
  15. Article
  16. Article
  17. Article
  18. Photoreceptor Cilia and Retinal Ciliopathies.Cold Spring Harbor perspectives in biology · 2017
    Review
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

8 authors at 3 institutions in 1 country.

Marisa ZallocchiBoys Town National Research Hospital, Omaha, NE 68131, USA. zallocchim@boystown.org
Daniel T Meehan
Duane Delimont
Charles Askew
Suneetha Garige
Michael Anne Gratton
Christie A Rothermund-Franklin
Dominic Cosgrove
Boys Town National Research Hospital · USUniversity of Nebraska Medical Center · USUniversity of Pennsylvania · US

Funding

USHERIN: STRUCTURAL AND FUNCTIONAL ANALYSISR01DC004844 · NIDCD · FATHER FLANAGAN'S BOYS'HOME · PI COSGROVE, DOMINIC E. · 2002 to 2012
$2.8M
Matrix OtopathologyR01DC006442 · NIDCD · UNIVERSITY OF PENNSYLVANIA · PI GRATTON, MICHAEL ANNE NMI · 2004 to 2011
$2.6M
CONSTRUCTION OF RESEARCH FACILITYC06RR017417 · NCRR · CREIGHTON UNIVERSITY · PI WILSON, M. ROY · 2002 to 2002
$2.0M
NCRR NIH HHS C06 RR017417NCRR NIH HHS RR17417-01NIDCD NIH HHS R01 DC004844NIDCD NIH HHS R01 DC 006442NIDCD NIH HHS R01 DC006442
6 · The paper itself

Abstract

The Usher syndrome 3A (CLRN1) gene encodes clarin-1, which is a member of the tetraspanin family of transmembrane proteins. Although identified more than 6 years ago, little is known about its localization or function in the eye and ear. We developed a polyclonal antibody that react with all clarin-1 isoforms and used it to characterize protein expression in cochlea and retina. In the cochlea, we observe clarin-1expression in the stereocilia of P0 mice, and in synaptic terminals present at the base of the auditory hair cells from E18 to P6. In the retina, clarin-1 localizes to the connecting cilia, inner segment of photoreceptors and to the ribbon synapses. RT-PCR from P0 cochlea and P28 retina show mRNAs encoding only isoforms 2 and 3. Western blots show that only isoform 2 is present in protein extracts from these same tissues. We examined clarin-1 expression in the immortomouse-derived hair cell line UB/OC-1. Only isoform 2 is expressed in UB/OC-1 at both mRNA and protein levels, suggesting this isoform is biologically relevant to hair cell function. The protein co-localizes with microtubules and post-transgolgi vesicles. The subcellular localization of clarin-1 in hair cells and photoreceptors suggests it functions at both the basal and apical poles of neurosensoriepithelia.

Indexed as

AnimalsAnimals, NewbornBase SequenceCell LineCochleaDNA PrimersFemaleGene ExpressionGestational AgeHair Cells, AuditoryMembrane ProteinsMiceMice, KnockoutMicroscopy, FluorescencePhotoreceptor Cells, VertebratePregnancyClrn1 protein, mouseDNA PrimersMembrane ProteinsProtein IsoformsRNA, MessengerRNA, Small Interfering

Identifiers

PMID19539019
PMCPMC2730942
OpenAlexW2059524639

What OpenQuestion holds

Textmetadata
LicenceTDM
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.