Evidence map›Paper›PMID 28461564›Full record

ArticleCancer research2017

Granzyme B PET Imaging as a Predictive Biomarker of Immunotherapy Response.

Benjamin M Larimer, Eric Wehrenberg-Klee, Frank Dubois, Anila Mehta, Taylor Kalomeris, Keith Flaherty, Genevieve Boland, Umar Mahmood

Registry-linked trialOpen access · bronzeAbstract read
In one paragraph

Article in Cancer research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07057349 (Phase 1 Multi-cohort Evaluation of [18F]CSB-321 PET Imaging in Participants Receiving Immunotherapy for the Treatment of Cancer), which is not on this map. Cited by 213 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
213citing papers in PubMed, 4 pooled it
12.4field-weighted citation impact, top 1% 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.

NCT07057349 phase1not yet recruitingnot on this mapstarted 2025, after this paper: background citation

Phase 1 Multi-cohort Evaluation of [18F]CSB-321 PET Imaging in Participants Receiving Immunotherapy for the Treatment of Cancer

TypeinterventionalSponsorCytosite Biopharma Inc.Ran2025 to 2029Enrolled40ConditionsMetastatic Cancer, Unresectable Solid TumorArms[18F]CSB-321
3 · Its place in the literature

Who cites it

213 citing papers in PubMed, 4 syntheses or guidelines pooled it, 313 citations in OpenAlex.

  1. Guideline
  2. Pooled it
  3. Pooled it
  4. Pooled it
  5. CD8 PET imaging with [Journal for immunotherapy of cancer · 2026
    Trial
  6. Nature communications · 2024
    Trial
  7. Review
  8. Article
  9. Article
  10. Article
  11. European journal of nuclear medicine and molecular imaging · 2026
    Article
  12. Challenges in tracer development for tumor microenvironment (TME) imaging.European journal of nuclear medicine and molecular imaging · 2026
    Review
  13. Article
  14. Review
  15. Article
  16. Review
  17. Article
  18. Granzyme B PET/CT predicts chemo-immunotherapy outcomes in microsatellite stable gastric cancers.European journal of nuclear medicine and molecular imaging · 2026
    Article
  19. Article
  20. Review

153 more citing papers are in PubMed but not listed here.

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

8 authors at 1 institution in 1 country.

Benjamin M LarimerAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts.
Eric Wehrenberg-KleeAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts.
Frank DuboisAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts.
Anila MehtaAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts.
Taylor KalomerisAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts.
Keith FlahertyDepartment of Medicine, Harvard Medical School, Boston, Massachusetts.
Genevieve BolandDepartment of Surgery, Massachusetts General Hospital, Boston, Massachusetts.
Umar MahmoodAthinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Boston, Massachusetts. umahmood@mgh.harvard.edu.
Harvard University · US

Funding

Tissue and Pathology ResourcesP50CA127003 · NCI · DANA-FARBER CANCER INST · PI EL-BARDEESY, NABEEL, SELLERS, WILLIAM R · 2007 to 2023
$33.2M
PET imaging of carcinoid tumors to guide individualized chemotherapyR01CA166582 · NCI · MASSACHUSETTS GENERAL HOSPITAL · PI MAHMOOD, UMAR · 2013 to 2017
$1.8M
NCI NIH HHS P50 CA127003NCI NIH HHS R01 CA166582
6 · The paper itself

Abstract

While cancer immunotherapy can produce dramatic responses, only a minority of patients respond to treatment. Reliable response biomarkers are needed to identify responders, and conventional imaging modalities have not proved adequate. Here, we provide a preclinical proof of concept for the use of granzyme B, a downstream effector of tumoral cytotoxic T cells, as an early biomarker for tumors responding to immunotherapy. We designed novel PET imaging probes for the murine and human granzyme B isoforms that specifically and quantitatively bind granzyme B. Immunotherapy-treated mice were imaged prior to therapy-induced tumor volume reduction. Imaging distinguished treated responders from nonresponders with excellent predictive ability. To assess the clinical value of a granzyme B imaging paradigm, biopsy specimens from melanoma patients on checkpoint inhibitor therapy were analyzed. A marked differential in granzyme B expression was observed between treated responders and nonresponders. Additionally, our human probe was able to specifically detect granzyme B expression in human samples, providing a clear candidate for clinical application. Overall, our results suggest granzyme B PET imaging can serve as a quantitatively useful predictive biomarker for efficacious responses to cancer immunotherapy.

Indexed as

ImmunotherapyPositron-Emission TomographyAnimalsBiomarkers, PharmacologicalBiopsyCell Line, TumorGranzymesHumansMelanomaMiceT-Lymphocytes, CytotoxicBiomarkers, PharmacologicalGranzymes

Identifiers

PMID28461564
PMCPMC5474226
OpenAlexW2611333272

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

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.