Evidence map›Paper›PMID 22203240›Full record

ArticleAngiogenesis2012

CLT1 targets angiogenic endothelium through CLIC1 and fibronectin.

Lynn M Knowles, Gunjan Malik, Brian L Hood, Thomas P Conrads, Jan Pilch

Open access · greenAbstract read
In one paragraph

Article in Angiogenesis, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
1.2field-weighted citation impact, top 24% 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

15 citing papers in PubMed, 35 citations in OpenAlex.

  1. Review
  2. CLIC1 Supports Mechanisms Related to Platelet Activation and Thrombosis.Transfusion medicine and hemotherapy : offizielles Organ der Deutschen Gesellschaft fur Transfusionsmedizin und Immunhamatologie · 2025
    Article
  3. Article
  4. Article
  5. Article
  6. Review
  7. Article
  8. Article
  9. Article
  10. Article
  11. Fibronectin overexpression is associated with latent membrane protein 1 expression and has independent prognostic value for nasopharyngeal carcinoma.Tumour biology : the journal of the International Society for Oncodevelopmental Biology and Medicine · 2014
    Article
  12. Article
  13. Article
  14. Article
  15. 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 3 institutions in 1 country.

Lynn M KnowlesDepartment of Urology, University of Pittsburgh School of Medicine, Shadyside Medical Center, Suite G33, 5200 Centre Avenue, Pittsburgh, PA 15232, USA.
Gunjan Malik
Brian L Hood
Thomas P Conrads
Jan Pilch
University of Pittsburgh · USInova Health System · USThe University of Texas Health Science Center at San Antonio · US

Funding

VECTOR CORE FACILITYP30CA047904 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI Jessie Nedrow · 1988 to 2026
$158.0M
SUPPRESSIVE ROLE OF ANDROGEN RESPONSE GENE CALRETICULIN IN PROSTATE CANCERP50CA090386 · NCI · NORTHWESTERN UNIVERSITY AT CHICAGO · PI CRAWFORD, SUSAN · 2001 to 2013
$25.1M
Clot formation in the tumor stroma as a target for prostate cancer treatmentR01CA134330 · NCI · UNIVERSITY OF PITTSBURGH AT PITTSBURGH · PI PILCH, JAN · 2008 to 2011
$1.2M
NCI NIH HHS CA134330NCI NIH HHS P30 CA047904NCI NIH HHS P30CA047904NCI NIH HHS P50 CA090386NCI NIH HHS P50 CA90386NCI NIH HHS R01 CA134330
6 · The paper itself

Abstract

Angiogenesis is important for tumor growth and metastasis. CLT1 (CGLIIQKNEC), a peptide that binds to tumor interstitial spaces in the presence of fibrin-fibronectin, has structural similarity to the anti-angiogenic β-sheet peptides anastellin and anginex. This similarity is reflected in the ability of CLT1 to form co-aggregates with fibronectin that induce an unfolded protein response and cause autophagic cell death in proliferating endothelial cells. CLT1 cytotoxicity is mediated at least in parts by a novel CLT1 binding protein, Chloride Intracellular Channel 1 (CLIC1), which promotes internalization of CLT1-fibronectin co-aggregates in a mechanism that depends on the LIIQK amino acid sequence of CLT1. LIIQK encompasses amino acid residues relevant for CLT1 binding to CLIC1 and in addition, facilitates the formation of CLT1-fibronectin co-aggregates, which in turn promote translocation of CLIC1 to the endothelial cell surface through ligation of integrin αvβ3. Paralleling the in vitro results, we found that CLT1 co-localizes with CLIC1 and fibronectin in angiogenic blood vessels in vivo, and that CLT1 treatment inhibited angiogenesis and tumor growth. Our findings show that CLT1 is a new anti-angiogenic compound, and its mechanism of action is to form co-aggregates with fibronectin, which bind to angiogenic endothelial cells through integrins, become internalized through CLIC1 and elicit a cytotoxic unfolded protein response. The simple structure and high potency of CLT1 make it a potentially useful compound for anti-angiogenic treatments.

Indexed as

Amino Acid SequenceAngiogenesis InhibitorsAnimalsAntineoplastic AgentsCell DeathCell Line, TumorCell MembraneCell ProliferationChloride ChannelsEndocytosisEndothelium, VascularFibronectinsHumansHuman Umbilical Vein Endothelial CellsLysosomesMaleAngiogenesis InhibitorsAntineoplastic AgentsChloride ChannelsCLIC1 protein, humancyclo(cysteinyl-glycyl-leucyl-isoleucyl-isoleucyl-glutaminyl-lysyl-asparaginyl-glutamyl-cysteinyl)FibronectinsPeptides, Cyclic

Identifiers

PMID22203240
PMCPMC3320048
OpenAlexW2073079122

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.