Evidence map›Paper›PMID 21464208›Full record

ArticleMolecular and cellular biology2011

Cysteine 27 variant of the delta-opioid receptor affects amyloid precursor protein processing through altered endocytic trafficking.

Timo Sarajärvi, Jussi T Tuusa, Annakaisa Haapasalo, Jarkko J Lackman, Raija Sormunen, Seppo Helisalmi, Johannes T Roehr, Antonio R Parrado, Petra Mäkinen, Lars Bertram and 4 more

Open access · bronzeAbstract read
In one paragraph

Article in Molecular and cellular biology, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 17 papers.

0numbers the graph read from it
0cells of the map it votes in
17citing papers in PubMed
1.9field-weighted citation impact, top 15% 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

17 citing papers in PubMed, 33 citations in OpenAlex.

  1. Trial
  2. Review
  3. Article
  4. Review
  5. Article
  6. Review
  7. Article
  8. Molecular Pharmacology of δ-Opioid Receptors.Pharmacological reviews · 2016
    Review
  9. Review
  10. Article
  11. Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Opioid system and Alzheimer's disease.Neuromolecular medicine · 2012
    Review
  17. 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

14 authors at 5 institutions in 3 countries.

Timo SarajärviInstitute of Clinical Medicine-Neurology, University of Eastern Finland, and Department of Neurology, Kuopio University Hospital, FI-70211 Kuopio, Finland.
Jussi T Tuusa
Annakaisa Haapasalo
Jarkko J Lackman
Raija Sormunen
Seppo Helisalmi
Johannes T Roehr
Antonio R Parrado
Petra Mäkinen
Lars Bertram
Hilkka Soininen
Rudolph E Tanzi
Ulla E Petäjä-Repo
Mikko Hiltunen
Kuopio University Hospital · FIUniversity of Oulu · FIMassachusetts General Hospital · USMax Planck Institute for Molecular Genetics · DEUniversity of Eastern Finland · FI

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Agonist-induced activation of the δ-opioid receptor (δOR) was recently shown to augment β- and γ-secretase activities, which increased the production of β-amyloid peptide (Aβ), known to accumulate in the brain tissues of Alzheimer's disease (AD) patients. Previously, the δOR variant with a phenylalanine at position 27 (δOR-Phe27) exhibited more efficient receptor maturation and higher stability at the cell surface than did the less common cysteine (δOR-Cys27) variant. For this study, we expressed these variants in human SH-SY5Y and HEK293 cells expressing exogenous or endogenous amyloid precursor protein (APP) and assessed the effects on APP processing. Expression of δOR-Cys27, but not δOR-Phe27, resulted in a robust accumulation of the APP C83 C-terminal fragment and the APP intracellular domain, while the total soluble APP and, particularly, the β-amyloid 40 levels were decreased. These changes upon δOR-Cys27 expression coincided with decreased localization of APP C-terminal fragments in late endosomes and lysosomes. Importantly, a long-term treatment with a subset of δOR-specific ligands or a c-Src tyrosine kinase inhibitor suppressed the δOR-Cys27-induced APP phenotype. These data suggest that an increased constitutive internalization and/or concurrent signaling of the δOR-Cys27 variant affects APP processing through altered endocytic trafficking of APP.

Indexed as

EndocytosisAlzheimer DiseaseAmino Acid SubstitutionAmyloid beta-Protein PrecursorBlotting, WesternFlow CytometryHEK293 CellsHumansImmunoprecipitationMutationPolymorphism, Single NucleotideProtein Processing, Post-TranslationalProtein TransportReceptors, Opioid, deltaSignal TransductionAmyloid beta-Protein PrecursorAPP protein, humanOPRD1 protein, humanReceptors, Opioid, delta

Identifiers

PMID21464208
PMCPMC3133236
OpenAlexW2155166479

What OpenQuestion holds

Textmetadata
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.