Evidence map›Paper›PMID 22739815›Full record

ArticleArthritis and rheumatism2012

Role of plasma kallikrein-kinin system activation in synovial recruitment of endothelial progenitor cells in experimental arthritis.

Jihong Dai, Alexis Agelan, Aizhen Yang, Viviana Zuluaga, Daniel Sexton, Robert W Colman, Yi Wu

Open access · greenAbstract read
In one paragraph

Article in Arthritis and rheumatism, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.

0numbers the graph read from it
0cells of the map it votes in
13citing papers in PubMed
0.9field-weighted citation impact, top 26% 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

13 citing papers in PubMed, 20 citations in OpenAlex.

  1. Pain mechanism and management strategy of rheumatoid arthritis.Frontiers in pain research (Lausanne, Switzerland) · 2025
    Review
  2. Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. A critical role for plasma kallikrein in the pathogenesis of autoantibody-induced arthritis.FASEB journal : official publication of the Federation of American Societies for Experimental Biology · 2017
    Article
  10. Article
  11. Article
  12. Kallikrein-kinin in stem cell therapy.World journal of stem cells · 2014
    Review
  13. 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

7 authors at 3 institutions in 2 countries.

Jihong DaiTemple University School of Medicine, Philadelphia, Pennsylvania, USA.
Alexis Agelan
Aizhen Yang
Viviana Zuluaga
Daniel Sexton
Robert W Colman
Yi Wu
Temple University · USSoochow University · CNTakeda (United States) · US

Funding

Innate Immunity in Experimental Arthritis of KininogenR01AR051713 · NIAMS · TEMPLE UNIV OF THE COMMONWEALTH · PI COLMAN, ROBERT W · 2004 to 2007
$1.2M
The kallikrein-kinin system in endothelial progenitor cell homing in arthritisR03AR057542 · NIAMS · TEMPLE UNIV OF THE COMMONWEALTH · PI WU, YI · 2009 to 2011
$221k
NIAMS NIH HHS R01 AR051713NIAMS NIH HHS R01-AR-051713NIAMS NIH HHS R03 AR057542NIAMS NIH HHS R03-AR-057542
6 · The paper itself

Abstract

objectiveTo examine whether activation of the plasma kallikrein-kinin system (KKS) mediates synovial recruitment of endothelial progenitor cells (EPCs) in arthritis.

methodsEPCs were isolated from Lewis rat bone marrow, and expression of progenitor cell-lineage markers and functional properties were characterized. EPCs were injected intravenously into Lewis rats with arthritis, and their recruitment and formation of de novo blood vessels in inflamed synovium were evaluated. The role of plasma KKS was examined using a plasma kallikrein inhibitor (EPI-KAL2) and an antikallikrein antibody (13G11). A transendothelial migration assay was used to determine the role of bradykinin and its receptor in EPC mobilization.

resultsEPCs from Lewis rats exhibited a strong capacity to form tubes and vacuoles and expressed increased levels of bradykinin type 2 receptor (B2R) and progenitor cell markers CD34 and Sca-1. In Lewis rats with arthritis, EPCs were recruited into inflamed synovium at the acute phase of disease and formed de novo blood vessels. Inhibition of plasma kallikrein by EPI-KAL2 and 13G11 significantly suppressed synovial recruitment of EPCs and hyperproliferation of synovial cells. Bradykinin stimulated transendothelial migration of EPCs in a concentration-dependent manner. This was mediated by B2R, as demonstrated by the finding that knockdown of B2R with silencing RNA completely blocked bradykinin-stimulated transendothelial migration. Moreover, bradykinin selectively up-regulated expression of the homing receptor CXCR4 in EPCs.

conclusionThese observations demonstrate a novel role of plasma KKS activation in the synovial recruitment of EPCs in arthritis, acting via kallikrein activation and B2R-dependent mechanisms. B2R might be involved in the mobilization of EPCs via up-regulation of CXCR4.

Indexed as

Acute DiseaseAnimalsArthritis, ExperimentalBone Marrow CellsBradykininCell MovementCells, CulturedEndothelium, VascularFemaleHematopoietic Stem CellsHematopoietic Stem Cell TransplantationKallikrein-Kinin SystemKallikreinsNeovascularization, PathologicRatsRats, Inbred LewBradykininCxcr4 protein, ratKallikreinsReceptor, Bradykinin B2Receptors, CXCR4RNA, Messenger

Identifiers

PMID22739815
PMCPMC3477304
OpenAlexW2028324779

What OpenQuestion holds

Textmetadata
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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.