Evidence map›Paper›PMID 34636990›Full record

ReviewEJNMMI research2021

There is a world beyond αvβ3-integrin: Multimeric ligands for imaging of the integrin subtypes αvβ6, αvβ8, αvβ3, and α5β1 by positron emission tomography.

Katja Steiger, Neil Gerard Quigley, Tanja Groll, Frauke Richter, Maximilian Alexander Zierke, Ambros Johannes Beer, Wilko Weichert, Markus Schwaiger, Susanne Kossatz, Johannes Notni

Abstract readReview
In one paragraph

Review in EJNMMI research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 2 pooled it
–field-weighted citation impact
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

29 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Pooled it
  2. Pooled it
  3. Prospective Phase II Trial of [Journal of nuclear medicine : official publication, Society of Nuclear Medicine · 2023
    Trial
  4. Article
  5. Article
  6. Article
  7. Article
  8. Review
  9. Article
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  11. The molecular blueprint of targeted radionuclide therapy.Nature reviews. Clinical oncology · 2025
    Review
  12. Integrin αvβ6-Targeted PET/CT Imaging of Non-Small Cell Lung Cancer with [Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2025
    Observational
  13. Article
  14. Cancers · 2025
    Review
  15. Article
  16. Enhanced radiotheranostic targeting of integrinActa pharmaceutica Sinica. B · 2025
    Article
  17. Journal of medicinal chemistry · 2024
    Article
  18. Review
  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

10 authors.

Katja SteigerInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany.
Neil Gerard QuigleyInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany.
Tanja GrollInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany.
Frauke RichterInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany.
Maximilian Alexander ZierkeInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany.
Ambros Johannes BeerKlinik Für Nuklearmedizin, Universitätsklinikum Ulm, Ulm, Germany.
Wilko WeichertInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany.
Markus SchwaigerKlinik Für Nuklearmedizin Und Zentralinstitut Für Translationale Krebsforschung (TranslaTUM), Klinikum Rechts Der Isar der Technischen Universität München, Munich, Germany.
Susanne KossatzKlinik Für Nuklearmedizin Und Zentralinstitut Für Translationale Krebsforschung (TranslaTUM), Klinikum Rechts Der Isar der Technischen Universität München, Munich, Germany.
Johannes NotniInstitut Für Pathologie Und Pathologische Anatomie, Technische Universität München, Munich, Germany. tum@notni.de.ORCID http://orcid.org/0000-0002-3964-3391

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundIn the context of nuclear medicine and theranostics, integrin-related research and development was, for most of the time, focused predominantly on 'RGD peptides' and the subtype αvβ3-integrin. However, there are no less than 24 known integrins, and peptides without the RGD sequence as well as non-peptidic ligands play an equally important role as selective integrin ligands. On the other hand, multimerization is a well-established method to increase the avidity of binding structures, but multimeric radiopharmaceuticals have not made their way into clinics yet. In this review, we describe how these aspects have been interwoven in the framework of the German Research Foundation's multi-group interdisciplinary funding scheme CRC 824, yielding a series of potent PET imaging agents for selective imaging of various integrin subtypes.

resultsThe gallium-68 chelator TRAP was utilized to elaborate symmetrical trimers of various peptidic and non-peptidic integrin ligands. Preclinical data suggested a high potential of the resulting Ga-68-tracers for PET-imaging of the integrins α5β1, αvβ8, αvβ6, and αvβ3. For the first three, we provide some additional immunohistochemistry data in human cancers, which suggest several future clinical applications. Finally, application of αvβ3- and αvβ6-integrin tracers in pancreatic carcinoma patients revealed that unlike αvβ3-targeted PET, αvβ6-integrin PET is not characterized by off-target uptake and thus, enables a substantially improved imaging of this type of cancer.

conclusionsNovel radiopharmaceuticals targeting a number of different integrins, above all, αvβ6, have proven their clinical potential and will play an increasingly important role in future theranostics.

Indexed as

Gallium-68IntegrinsPositron emission tomographyRadiopharmaceuticalsTheranostics

Identifiers

PMID34636990
PMCPMC8506476

What OpenQuestion holds

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Registered trials

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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.