Evidence map›Paper›PMID 24510313›Full record

ArticleMolecular neurobiology2014

Sterol carrier protein-2: binding protein for endocannabinoids.

Elizabeth Sabens Liedhegner, Caleb D Vogt, Daniel S Sem, Christopher W Cunningham, Cecilia J Hillard

Open access · greenAbstract read
In one paragraph

Article in Molecular neurobiology, 2014. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 24 papers.

0numbers the graph read from it
0cells of the map it votes in
24citing papers in PubMed
2.9field-weighted citation impact, top 10% 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

24 citing papers in PubMed, 40 citations in OpenAlex.

  1. Article
  2. Review
  3. Article
  4. Review
  5. Review
  6. Article
  7. Review
  8. Article
  9. Review
  10. Mechanisms of endocannabinoid transport in the brain.British journal of pharmacology · 2022
    Review
  11. Review
  12. Hypothalamic endocannabinoids in obesity: an old story with new challenges.Cellular and molecular life sciences : CMLS · 2021
    Review
  13. Article
  14. The Epigenetics of the Endocannabinoid System.International journal of molecular sciences · 2020
    Review
  15. Article
  16. Review
  17. Article
  18. Article
  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

5 authors at 2 institutions in 1 country.

Elizabeth Sabens LiedhegnerNeuroscience Research Center and Departments of Pharmacology and Toxicology, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI, 53226, USA.
Caleb D Vogt
Daniel S Sem
Christopher W Cunningham
Cecilia J Hillard
University of Wisconsin System · USMedical College of Wisconsin · US

Funding

BIOCHEMISTRY OF ANANDAMIDE, AN ENDOGENOUS CANNABINOIDR01DA009155 · NIDA · MEDICAL COLLEGE OF WISCONSIN · PI HILLARD, CECILIA J · 1996 to 2011
$3.4M
Cannabinoid regulation of glycogen synthase kinase-3R01DA026996 · NIDA · MEDICAL COLLEGE OF WISCONSIN · PI HILLARD, CECILIA J · 2010 to 2014
$1.7M
NIDA NIH HHS DA026996NIDA NIH HHS DA09155NIDA NIH HHS R01 DA009155NIDA NIH HHS R01 DA026996
6 · The paper itself

Abstract

The endocannabinoid (eCB) system, consisting of eCB ligands and the type 1 cannabinoid receptor (CB1R), subserves retrograde, activity-dependent synaptic plasticity in the brain. eCB signaling occurs "on-demand," thus the processes regulating synthesis, mobilization and degradation of eCBs are also primary mechanisms for the regulation of CB1R activity. The eCBs, N-arachidonylethanolamine (AEA) and 2-arachidonoylglycerol (2-AG), are poorly soluble in water. We hypothesize that their aqueous solubility, and, therefore, their intracellular and transcellular distribution, are facilitated by protein binding. Using in silico docking studies, we have identified the nonspecific lipid binding protein, sterol carrier protein 2 (SCP-2), as a potential AEA binding protein. The docking studies predict that AEA and AM404 associate with SCP-2 at a putative cholesterol binding pocket with ∆G values of -3.6 and -4.6 kcal/mol, respectively. These values are considerably higher than cholesterol (-6.62 kcal/mol) but consistent with a favorable binding interaction. In support of the docking studies, SCP-2-mediated transfer of cholesterol in vitro is inhibited by micromolar concentrations of AEA; and heterologous expression of SCP-2 in HEK 293 cells increases time-related accumulation of AEA in a temperature-dependent fashion. These results suggest that SCP-2 facilitates cellular uptake of AEA. However, there is no effect of SCP-2 transfection on the cellular accumulation of AEA determined at equilibrium or the IC50 values for AEA, AM404 or 2-AG to inhibit steady state accumulation of radiolabelled AEA. We conclude that SCP-2 is a low affinity binding protein for AEA that can facilitate its cellular uptake but does not contribute significantly to intracellular sequestration of AEA.

Indexed as

Arachidonic AcidsCarrier ProteinsCholesterolEndocannabinoidsHEK293 CellsHumansLipidsNeuronsProtein BindingSignal TransductionArachidonic AcidsCarrier ProteinsCholesterolEndocannabinoidsLipidsN-(4-hydroxyphenyl)arachidonylamidesterol carrier proteins

Identifiers

PMID24510313
PMCPMC4450258
OpenAlexW2077127073

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.