Evidence map›Paper›PMID 22987438›Full record

ArticleGlia2012

Molecular scaffolds underpinning macroglial polarization: an analysis of retinal Müller cells and brain astrocytes in mouse.

Rune Enger, Georg Andreas Gundersen, Nadia Nabil Haj-Yasein, Martine Eilert-Olsen, Anna Elisabeth Thoren, Gry Fluge Vindedal, Pétur Henry Petersen, Øivind Skare, Maiken Nedergaard, Ole Petter Ottersen and 1 more

Abstract read
In one paragraph

Article in Glia, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 21 papers.

0numbers the graph read from it
0cells of the map it votes in
21citing papers in PubMed
–field-weighted citation impact
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

21 citing papers in PubMed.

  1. Article
  2. Article
  3. Review
  4. Review
  5. Article
  6. Astrocytic CaFrontiers in cellular neuroscience · 2021
    Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Article
  12. Article
  13. Review
  14. Aquaporin-4 and Cerebrovascular Diseases.International journal of molecular sciences · 2016
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. 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

11 authors.

Rune EngerCentre for Molecular Biology and Neuroscience, Institute of Basic Medical Sciences, University of Oslo, Norway.
Georg Andreas Gundersen
Nadia Nabil Haj-Yasein
Martine Eilert-Olsen
Anna Elisabeth Thoren
Gry Fluge Vindedal
Pétur Henry Petersen
Øivind Skare
Maiken Nedergaard
Ole Petter Ottersen
Erlend A Nagelhus

Funding

Failure of metabolite clearance in a model of multi-lacunar infarctsR01NS078167 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2012 to 2016
$1.8M
The glymphatic system, a new concept in glia biologyR01NS078304 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2012 to 2016
$1.7M
ATP as the instigator of inflammatory responses to spinal cord injuryR01NS075177 · NINDS · UNIVERSITY OF ROCHESTER · PI NEDERGAARD, MAIKEN · 2012 to 2016
$1.6M
NINDS NIH HHS R01 NS075177NINDS NIH HHS R01 NS078167NINDS NIH HHS R01 NS078304
6 · The paper itself

Abstract

Key roles of macroglia are inextricably coupled to specialized membrane domains. The perivascular endfoot membrane has drawn particular attention, as this domain contains a unique complement of aquaporin-4 (AQP4) and other channel proteins that distinguishes it from perisynaptic membranes. Recent studies indicate that the polarization of macroglia is lost in a number of diseases, including temporal lobe epilepsy and Alzheimer's disease. A better understanding is required of the molecular underpinning of astroglial polarization, particularly when it comes to the significance of the dystrophin associated protein complex (DAPC). Here, we employ immunofluorescence and immunogold cytochemistry to analyze the molecular scaffolding in perivascular endfeet in macroglia of retina and three regions of brain (cortex, dentate gyrus, and cerebellum), using AQP4 as a marker. Compared with brain astrocytes, Müller cells (a class of retinal macroglia) exhibit lower densities of the scaffold proteins dystrophin and α-syntrophin (a DAPC protein), but higher levels of AQP4. In agreement, depletion of dystrophin or α-syntrophin--while causing a dramatic loss of AQP4 from endfoot membranes of brain astrocytes--had only modest or insignificant effect, respectively, on the AQP4 pool in endfoot membranes of Müller cells. In addition, while polarization of brain macroglia was less affected by dystrophin depletion than by targeted deletion of α-syntrophin, the reverse was true for retinal macroglia. These data indicate that the molecular scaffolding in perivascular endfeet is more complex than previously assumed and that macroglia are heterogeneous with respect to the mechanisms that dictate their polarization.

Indexed as

AnimalsAquaporin 4AstrocytesBrainBrain ChemistryCalcium-Binding ProteinsCell PolarityDystrophinDystrophin-Associated ProteinsImmunohistochemistryMaleMembrane ProteinsMiceMice, 129 StrainMice, Inbred C57BLMice, Inbred mdxAqp4 protein, mouseAquaporin 4Calcium-Binding ProteinsDystrophinDystrophin-Associated ProteinsMembrane ProteinsMuscle Proteinssyntrophinsyntrophin alpha1

Identifiers

PMID22987438
PMCPMC4306326

What OpenQuestion holds

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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.