Evidence map›Paper›PMID 21087672›Full record

ArticleNeuroImage2011

Beneficial network effects of methylene blue in an amnestic model.

Penny D Riha, Julio C Rojas, F Gonzalez-Lima

Open access · hybridAbstract read
In one paragraph

Article in NeuroImage, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
3.9field-weighted citation impact, top 6% 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

27 citing papers in PubMed, 57 citations in OpenAlex.

  1. Trial
  2. Trial
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Antidotal Effects of the Phenothiazine Chromophore Methylene Blue Following Cyanide Intoxication.Toxicological sciences : an official journal of the Society of Toxicology · 2019
    Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Methylene blue counteracts H2S toxicity-induced cardiac depression by restoring L-type Ca channel activity.American journal of physiology. Regulatory, integrative and comparative physiology · 2016
    Article
  15. Review
  16. Article
  17. Article
  18. Review
  19. Article
  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

3 authors at 1 institution in 1 country.

Penny D RihaDepartments of Psychology, Pharmacology and Toxicology, University of Texas at Austin, Austin, TX 78712, USA.
Julio C Rojas
F Gonzalez-Lima
The University of Texas at Austin · US

Funding

Texas Consortium Program in Behavioral NeuroscienceT32MH065728 · NIMH · UNIVERSITY OF TEXAS AUSTIN · PI GONZALEZ-LIMA, FRANCISCO · 2002 to 2009
$4.9M
Brain Mechanisms Underlying the Congenital Predisposition to HelplessnessR01MH076847 · NIMH · UNIVERSITY OF TEXAS AT AUSTIN · PI GONZALEZ-LIMA, FRANCISCO · 2007 to 2010
$1.1M
NIMH NIH HHS MH076847NIMH NIH HHS MH65728NIMH NIH HHS R01 MH076847NIMH NIH HHS T32 MH065728
6 · The paper itself

Abstract

Posterior cingulate/retrosplenial cortex (PCC) hypometabolism is a common feature in amnestic mild cognitive impairment and Alzheimer's disease. In rats, PCC hypometabolism induced by mitochondrial dysfunction induces oxidative damage, neurodegeneration and memory deficits. USP methylene blue (MB) is a diaminophenothiazine drug with antioxidant and metabolic-enhancing properties. In rats, MB facilitates memory and prevents neurodegeneration induced by mitochondrial dysfunction. This study tested the memory-enhancing properties of systemic MB in rats that received an infusion of sodium azide, a cytochrome oxidase inhibitor, directly into the PCC. Lesion volumes were estimated with unbiased stereology. MB's network-level mechanism of action was analyzed using graph theory and structural equation modeling based on cytochrome oxidase histochemistry-derived metabolic mapping data. Sodium azide infusions induced PCC hypometabolism and impaired visuospatial memory in a holeboard food-search task. Isolated PCC cytochrome oxidase inhibition disrupted the cingulo-thalamo-hippocampal effective connectivity, decreased the PCC functional networks and created functional redundancy within the thalamus. An intraperitoneal dose of 4 mg/kg MB prevented the memory impairment, reduced the PCC metabolic lesion volume and partially restored the cingulo-thalamo-hippocampal network effects. The effects of MB were dependent upon the local sub-network necessary for memory retrieval. The data support that MB's metabolic-enhancing effects are contingent upon the neural context, and that MB is able to boost coherent and orchestrated adaptations in response to physical alterations to the network involved in visuospatial memory. These results implicate MB as a candidate intervention to improve memory. Because of its neuroprotective properties, MB may have disease-modifying effects in amnestic conditions associated with hypometabolism.

Indexed as

AmnesiaAnimalsCognition DisordersEnzyme InhibitorsGyrus CinguliMaleMethylene BlueNeuroprotective AgentsRatsRats, Sprague-DawleySodium AzideEnzyme InhibitorsMethylene BlueNeuroprotective AgentsSodium Azide

Identifiers

PMID21087672
PMCPMC3026638
OpenAlexW2157487795

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.