Evidence map›Paper›PMID 22696173›Full record

ArticleCell and tissue research2012

Ablation of TNAP function compromises myelination and synaptogenesis in the mouse brain.

János Hanics, János Barna, Jinsong Xiao, José Luis Millán, Caroline Fonta, László Négyessy

Open access · greenAbstract read
In one paragraph

Article in Cell and tissue research, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
2.9field-weighted citation impact, top 9% 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

26 citing papers in PubMed, 53 citations in OpenAlex.

  1. Hypophosphatasia-pathophysiological understanding, preclinical data looking beyond the skeleton, and upcoming treatments.Journal of bone and mineral research : the official journal of the American Society for Bone and Mineral Research · 2026
    Review
  2. Article
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  11. TNAP as a New Player in Chronic Inflammatory Conditions and Metabolism.International journal of molecular sciences · 2021
    Review
  12. Review
  13. Neonatal Seizures and Purinergic Signalling.International journal of molecular sciences · 2020
    Review
  14. Article
  15. Review
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  19. Article
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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

6 authors at 4 institutions in 4 countries.

János HanicsDepartment of Anatomy, Histology and Embryology, Semmelweis University, Budapest, Hungary.
János Barna
Jinsong Xiao
José Luis Millán
Caroline Fonta
László Négyessy
Semmelweis University · HUUniversité Fédérale de Toulouse Midi-Pyrénées · FRHUN-REN Wigner Research Centre for Physics · HUSanford Burnham Prebys Medical Discovery Institute · US

Funding

MOLECULAR PATHOGENESIS/TREATMENT OF HYPOPHOSPHATASIAR01DE012889 · NIDCR · SANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE · PI MILLAN, JOSE LUIS · 1999 to 2020
$9.2M
Mechanisms of initiation of skeletal mineralizationR01AR053102 · NIAMS · SANFORD BURNHAM PREBYS MEDICAL DISCOVERY INSTITUTE · PI MILLAN, JOSE LUIS · 2006 to 2015
$3.8M
NIAMS NIH HHS R01 AR053102NIDCR NIH HHS DE12889NIDCR NIH HHS R01 DE012889
6 · The paper itself

Abstract

Mutations in the tissue-nonspecific alkaline phosphatase (TNAP) gene can result in skeletal and dental hypomineralization and severe neurological symptoms. TNAP is expressed in the synaptic cleft and the node of Ranvier in normal adults. Using TNAP knockout (KO) mice (Akp2(-/-)), we studied synaptogenesis and myelination with light- and electron microscopy during the early postnatal days. Ablation of TNAP function resulted in a significant decrease of the white matter of the spinal cord accompanied by ultrastructural evidence of cellular degradation around the paranodal regions and a decreased ratio and diameter of the myelinated axons. In the cerebral cortex, myelinated axons, while present in wild-type, were absent in the Akp2( -/- ) mice and these animals also displayed a significantly increased proportion of immature cortical synapses. The results suggest that TNAP deficiency could contribute to neurological symptoms related to myelin abnormalities and synaptic dysfunction, among which epilepsy, consistently present in the Akp2(-/-) mice and observed in severe cases of hypophosphatasia.

Indexed as

Alkaline PhosphataseAnimalsCerebral CortexGene Knockout TechniquesMiceMice, KnockoutMyelin SheathSpinal CordSynapsesAlkaline PhosphataseALPL protein, mouse

Identifiers

PMID22696173
PMCPMC3415568
OpenAlexW2128951839

What OpenQuestion holds

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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.