Evidence map›Paper›PMID 21655198›Full record

ArticlePloS one2011

CXCR7 protein expression in human adult brain and differentiated neurons.

Saori Shimizu, Michael Brown, Rajarshi Sengupta, Mark E Penfold, Olimpia Meucci

Open access · goldAbstract read
In one paragraph

Article in PloS one, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed
3.2field-weighted citation impact, top 7% 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

36 citing papers in PubMed, 68 citations in OpenAlex.

  1. Review
  2. Article
  3. Article
  4. Review
  5. Review
  6. Review
  7. Review
  8. Article
  9. Article
  10. Advances in CXCR7 Modulators.Pharmaceuticals (Basel, Switzerland) · 2020
    Review
  11. Article
  12. Review
  13. Article
  14. Review
  15. Frontline Science: CXCR7 mediates CD14Journal of leukocyte biology · 2017
    Article
  16. Review
  17. Pattern of CXCR7 Gene Expression in Mouse Brain Under Normal and Inflammatory Conditions.Journal of neuroimmune pharmacology : the official journal of the Society on NeuroImmune Pharmacology · 2016
    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.

Saori ShimizuDepartment of Pharmacology and Physiology, Drexel University College of Medicine, Philadelphia, Pennsylvania, United States of America.
Michael Brown
Rajarshi Sengupta
Mark E Penfold
Olimpia Meucci
Drexel University · USChemoCentryx (United States) · US

Funding

Role of chemokine receptors in neuronal survivalR01DA015014 · NIDA · MCP HAHNEMANN UNIVERSITY · PI MEUCCI, OLIMPIA · 2001 to 2017
$4.3M
Role of chemokines in neuronal function and survivalR37DA015014 · NIDA · DREXEL UNIVERSITY · PI Olimpia Meucci · 2018 to 2026
$3.7M
National NeuroAIDS Tissue Consortium Statistics and Data Coordinating CenterU01MH083545 · NIMH · INDIANA UNIVERSITY INDIANAPOLIS · PI YIANNOUTSOS, CONSTANTIN THEODORE · 2008 to 2012
$3.3M
Cellular and Molecular Mechanisms of HIV NeuropathologyR01DA019808 · NIDA · DREXEL UNIVERSITY · PI MEUCCI, OLIMPIA · 2004 to 2008
$1.8M
NIDA NIH HHS DA15014NIDA NIH HHS DA19808NIDA NIH HHS R01 DA015014NIDA NIH HHS R01 DA019808NIDA NIH HHS R37 DA015014NIMH NIH HHS U01 MH083545
6 · The paper itself

Abstract

backgroundCXCR7 and CXCR4 are receptors for the chemokine CXCL12, which is involved in essential functions of the immune and nervous systems. Although CXCR7 transcripts are widely expressed throughout the central nervous system, little is known about its protein distribution and function in the adult brain. To evaluate its potential involvement in CXCL12/CXCR4 signaling in differentiated neurons, we studied CXCR7 protein expression in human brain and cultured neurons. METHODOLOGY/PRINCIPAL

findingsImmunohistochemistry and RT-PCR analyses of cortex and hippocampus from control and HIV-positive subjects provided the first evidence of CXCR7 protein expression in human adult neurons, under normal and pathological conditions. Furthermore, confocal microscopy and binding assays in cultured neurons show that CXCR7 protein is mainly located into cytoplasm, while little to no protein expression is found on neuronal plasma membrane. Interestingly, specific CXCR7 ligands that inhibit CXCL12 binding to CXCR7 do not alter CXCR4-activated survival signaling (pERK/pAkt) in rat cortical neurons. Neuronal CXCR7 co-localizes to some extent with the endoplasmic reticulum marker ERp29, but not with early/late endosome markers. Additionally, large areas of overlap are detected in the intracellular pattern of CXCR7 and CXCR4 expression. CONCLUSIONS/SIGNIFICANCE: Overall, these results implicate CXCR4 as the main CXCL12 signaling receptor on the surface of differentiated neurons and suggest that CXCR7 may interact with CXCR4 at the intracellular level, possibly affecting CXCR4 trafficking and/or coupling to other proteins.

Indexed as

AdultBlotting, WesternCell DifferentiationCells, CulturedFemaleHumansImmunohistochemistryIn Vitro TechniquesMaleMiddle AgedNeuronsReceptors, CXCRReceptors, CXCR4Reverse Transcriptase Polymerase Chain ReactionACKR3 protein, humanCXCR4 protein, humanReceptors, CXCRReceptors, CXCR4

Identifiers

PMID21655198
PMCPMC3105114
OpenAlexW1974177265

What OpenQuestion holds

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LicenceCC BY
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.