Evidence map›Paper›PMID 35045958›Full record

ArticleClinical cancer research : an official journal of the American Association for Cancer Research2022

Predictable Clinical Benefits without Evidence of Synergy in Trials of Combination Therapies with Immune-Checkpoint Inhibitors.

Adam C Palmer, Benjamin Izar, Haeun Hwangbo, Peter K Sorger

Open access · hybridAbstract read
In one paragraph

Article in Clinical cancer research : an official journal of the American Association for Cancer Research, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed, 2 pooled it
6.7field-weighted citation impact, top 2% 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

43 citing papers in PubMed, 2 syntheses or guidelines pooled it, 66 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Phase II Study of Eribulin plus Pembrolizumab in Metastatic Soft-tissue Sarcomas: Clinical Outcomes and Biological Correlates.Clinical cancer research : an official journal of the American Association for Cancer Research · 2024
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  17. Investigating the synergistic effects of immunochemotherapy in esophageal squamous cell carcinoma.Esophagus : official journal of the Japan Esophageal Society · 2025
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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

4 authors at 2 institutions in 1 country.

Adam C PalmerDepartment of Pharmacology, Computational Medicine Program, UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.ORCID 0000-0001-5028-7028
Benjamin IzarLaboratory of Systems Pharmacology, Harvard Program in Therapeutic Science, Harvard Medical School, Boston, Massachusetts.
Haeun HwangboDepartment of Pharmacology, Computational Medicine Program, UNC Lineberger Comprehensive Cancer Center, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.
Peter K SorgerLaboratory of Systems Pharmacology, Harvard Program in Therapeutic Science, Harvard Medical School, Boston, Massachusetts. peter_sorger@hms.harvard.edu.ORCID 0000-0002-3364-1838
Harvard University · USUniversity of North Carolina at Chapel Hill · US

Funding

Systems Pharmacology of Therapeutic and Adverse Responses to ImmuneCheckpoint and Small Molecule DrugsU54CA225088 · NCI · HARVARD MEDICAL SCHOOL · PI HAIGIS, MARCIA · 2018 to 2022
$10.8M
Mechanisms of liver metastasis and associated resistance to immunotherapyR37CA258829 · NCI · COLUMBIA UNIVERSITY HEALTH SCIENCES · PI Benjamin Izar · 2021 to 2026
$2.6M
Dissecting mechanisms of immunotherapy resistance in melanoma patientsK08CA222663 · NCI · DANA-FARBER CANCER INST · PI IZAR, BENJAMIN · 2017 to 2021
$827k
NCI NIH HHS K08 CA222663NCI NIH HHS R37 CA258829NCI NIH HHS U54 CA225088
6 · The paper itself

Abstract

purposeCombinations of immune-checkpoint inhibitors (ICI) with other cancer therapies have been approved for advanced cancers in multiple indications, and numerous trials are under way to test new combinations. However, the mechanisms that account for the superiority of approved ICI combinations relative to their constituent monotherapies remain unknown. EXPERIMENTAL

designWe analyzed 13 phase III clinical trials testing combinations of ICIs with each other or other drugs in patients with advanced melanoma and lung, breast, gastric, kidney, and head and neck cancers. The clinical activity of the individual constituent therapies, measured in the same or a closely matched trial cohort, was used to compute progression-free survival (PFS) curves expected under a model of independent drug action. To identify additive or synergistic efficacy, PFS expected under this null model was compared with observed PFS by Cox regression.

resultsPFS elicited by approved combination therapies with ICIs could be accurately predicted from monotherapy data using the independent drug action model (Pearson

conclusionsCombining ICIs with other cancer therapies affords predictable and clinically meaningful benefit by providing patients with multiple chances of response to a single agent. Conversely, there exists no evidence in phase III trials that other therapies interact with and enhance the activity of ICIs. These findings can inform the design and testing of new ICI combination therapies while emphasizing the importance of developing better predictors (biomarkers) of ICI response.

Indexed as

Immune Checkpoint InhibitorsMelanomaClinical Trials, Phase III as TopicCohort StudiesCombined Modality TherapyHumansProgression-Free SurvivalImmune Checkpoint Inhibitors

Identifiers

PMID35045958
PMCPMC9068233
OpenAlexW4206616281

What OpenQuestion holds

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LicenceCC BY-NC-ND
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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.