Evidence map›Paper›PMID 19369543›Full record

ArticleThe Journal of neuroscience : the official journal of the Society for Neuroscience2009

Connexin32 mutations cause loss of function in Schwann cells and oligodendrocytes leading to PNS and CNS myelination defects.

Irene Sargiannidou, Natalie Vavlitou, Sophia Aristodemou, Andreas Hadjisavvas, Kyriacos Kyriacou, Steven S Scherer, Kleopas A Kleopa

Open access · bronzeAbstract readComparative Study
In one paragraph

Article in The Journal of neuroscience : the official journal of the Society for Neuroscience, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 56 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
56citing papers in PubMed, 2 pooled it
4.1field-weighted citation impact, top 5% 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

56 citing papers in PubMed, 2 syntheses or guidelines pooled it, 117 citations in OpenAlex.

  1. Pooled it
  2. Systematic review of CMTX1 patients with episodic neurological dysfunction.Annals of clinical and translational neurology · 2021
    Pooled it
  3. Review
  4. A dose escalation and safety study of AAVrh10-mediated Schwann cell-targeted gene therapy for CMT1X.Neurotherapeutics : the journal of the American Society for Experimental NeuroTherapeutics · 2025
    Article
  5. Glial connexins in glaucoma.Frontiers in neuroscience · 2025
    Review
  6. Article
  7. Article
  8. A novel HSPB1Prostaglandins & other lipid mediators · 2023
    Article
  9. Article
  10. Review
  11. X-linked Charcot Marie Tooth mutations alter COFrontiers in cellular neuroscience · 2023
    Article
  12. Review
  13. Connexin Mutations and Hereditary Diseases.International journal of molecular sciences · 2022
    Review
  14. Article
  15. Review
  16. Emerging Therapies for Charcot-Marie-Tooth Inherited Neuropathies.International journal of molecular sciences · 2021
    Review
  17. Article
  18. Article
  19. Review
  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 2 institutions in 2 countries.

Irene SargiannidouNeuroscience Laboratory, The Cyprus Institute of Neurology and Genetics, 1683 Nicosia, Cyprus.
Natalie Vavlitou
Sophia Aristodemou
Andreas Hadjisavvas
Kyriacos Kyriacou
Steven S Scherer
Kleopas A Kleopa
Cyprus Institute of Neurology and Genetics · CYUniversity of Pennsylvania · US

Funding

The Role of Connexin32 in the Pathogensis of CMTXR01NS055284 · NINDS · UNIVERSITY OF PENNSYLVANIA · PI SCHERER, STEVEN SIMON · 2007 to 2016
$2.9M
NINDS NIH HHS R01 NS055284NINDS NIH HHS R01 NS55284
6 · The paper itself

Abstract

The gap junction (GJ) protein connexin32 (Cx32) is expressed by myelinating Schwann cells and oligodendrocytes and is mutated in X-linked Charcot-Marie-Tooth disease. In addition to a demyelinating peripheral neuropathy, some Cx32 mutants are associated with transient or chronic CNS phenotypes. To investigate the molecular basis of these phenotypes, we generated transgenic mice expressing the T55I or the R75W mutation and an IRES-EGFP, driven by the mouse Cnp promoter. The transgene was expressed in oligodendrocytes throughout the CNS and in Schwann cells. Both the T55I and the R75W mutants were localized in the perinuclear cytoplasm, did not form GJ plaques, and did not alter the expression or localization of two other oligodendrocytic GJ proteins, Cx47 and Cx29, or the expression of Cx29 in Schwann cells. On wild type background, the expression of endogenous mCx32 was unaffected by the T55I mutant, but was partly impaired by R75W. Transgenic mice with the R75W mutation and all mutant animals with Gjb1-null background developed a progressive demyelinating peripheral neuropathy along with CNS myelination defects. These findings suggest that Cx32 mutations result in loss of function in myelinated cells without trans-dominant effects on other GJ proteins. Loss of Cx32 function alone in the CNS causes myelination defects.

Indexed as

Mutagenesis, Site-DirectedAnimalsCentral Nervous SystemConnexinsDemyelinating DiseasesFemaleGap Junction beta-1 ProteinGenes, DominantHumansMaleMiceMice, KnockoutMice, TransgenicNerve Fibers, MyelinatedOligodendrogliaPeripheral Nervous SystemConnexinsGap Junction beta-1 Protein

Identifiers

PMID19369543
PMCPMC2721059
OpenAlexW2170836507

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.