Evidence map›Paper›PMID 22222721›Full record

ArticleNeurochemistry international2012

[¹²⁵I]SD-7015 reveals fine modalities of CB₁ cannabinoid receptor density in the prefrontal cortex during progression of Alzheimer's disease.

Szabolcs Farkas, Katalin Nagy, Miklós Palkovits, Gábor G Kovács, Zhisheng Jia, Sean Donohue, Vic Pike, Christer Halldin, Domokos Máthé, Tibor Harkany and 2 more

Abstract read
In one paragraph

Article in Neurochemistry international, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
2.2field-weighted citation impact, top 14% 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

20 citing papers in PubMed, 43 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Review
  5. Review
  6. Review
  7. Review
  8. Article
  9. Article
  10. Endocannabinoid System Biomarkers in Alzheimer's Disease.Cannabis and cannabinoid research · 2023
    Article
  11. Review
  12. Cannabinoids for Agitation in Alzheimer's Disease.The American journal of geriatric psychiatry : official journal of the American Association for Geriatric Psychiatry · 2021
    Review
  13. Article
  14. Inhibitory Control Deficits Associated with Upregulation of CBJournal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2019
    Article
  15. Observational
  16. Article
  17. Article
  18. Review
  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

12 authors at 6 institutions in 4 countries.

Szabolcs FarkasDepartment of Neurology, University of Debrecen, H-4012 Debrecen, Hungary.
Katalin Nagy
Miklós Palkovits
Gábor G Kovács
Zhisheng Jia
Sean Donohue
Vic Pike
Christer Halldin
Domokos Máthé
Tibor Harkany
Balázs Gulyás
László Csiba
Karolinska Institutet · SEUniversity of Debrecen · HUNational Institute of Mental Health · USMedical University of Vienna · ATMontavid Thermodynamic Research Group · HUSemmelweis University · HU

Funding

PET Radiopharmaceutical SciencesZIAMH002793 · NIMH · NATIONAL INSTITUTE OF MENTAL HEALTH · PI PIKE, VICTOR W · 2009 to 2025
$69.8M
Intramural NIH HHS ZIA MH002793
6 · The paper itself

Abstract

The cannabinoid type-1 receptor (CB₁R) is one of the most abundant members of the G protein-coupled receptor family in the central nervous system. Once activated by their cognate ligands, endocannabinoids, CB₁Rs generally limit the timing of neurotransmitter release at many cortical synapses. Prior studies have indicated the involvement of CB₁R in neurodegeneration and in various neuronal insults, with an emphasis on their neuroprotective role. In the present study we used a novel selective CB₁R radioligand to investigate regional variations in CB₁R ligand binding as a factor of progressive Braak tau pathology in the frontal cortex of Alzheimer's disease (AD) patients. The frontal cortex was chosen for this study due to the high density of CB₁Rs and their well-characterized involvement in the progression of AD. Post-mortem prefrontal cortex samples from AD patients from Braak stages I to VI and controls were subjected to CB₁R autoradiography with [¹²⁵I]SD-7015 as radioligand. Regional concentration of [¹²⁵I]SD-7015, corresponding to, and thereby representing, regional CB₁R densities, were expressed in fM/g_tissue. The results show that CB₁R density inversely correlates with Braak tau pathology with the following tendency: controls <AD Braak stage V-VI <AD Braak stage III-IV <AD Braak stage I-II. Differences were significant between control and AD Braak stage I-II groups, as well as between controls and the AD group comprising all Braak stages. These findings indicate an up-regulation of the tissue binding of the selective CB₁R radioligand [¹²⁵I]SD7015 in human brains, allowing the detection of fine modalities of receptor expression and radioligand binding during the progression of AD.

Indexed as

PyrazolesRadiopharmaceuticalsAgedAged, 80 and overAgingAlzheimer DiseaseAutoradiographyCalibrationDisease ProgressionFemaleHumansMaleMiddle AgedPrefrontal CortexRadionuclide ImagingReceptor, Cannabinoid, CB14-cyano-1-(2-iodophenyl)-5-(4-methoxyphenyl)-N-(piperidin-1-yl)-1H-pyrazole-3-carboxamidePyrazolesRadiopharmaceuticalsReceptor, Cannabinoid, CB1

Identifiers

PMID22222721
PMCPMC4180663
OpenAlexW1990023400

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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.