Evidence map›Paper›PMID 33789881›Full record

ArticleJournal for immunotherapy of cancer2021

Complement C3a and C5a receptor blockade modulates regulatory T cell conversion in head and neck cancer.

Jacob Gadwa, Thomas E Bickett, Laurel B Darragh, Michael William Knitz, Shilpa Bhatia, Miles Piper, Benjamin Van Court, Shiv Bhuvane, Diemmy Nguyen, Varuna Nangia and 3 more

Abstract read
In one paragraph

Article in Journal for immunotherapy of cancer, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 22 papers.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed
–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

22 citing papers in PubMed.

  1. Review
  2. Article
  3. Complement system in cancer: friend or foe of immunotherapy.Journal for immunotherapy of cancer · 2026
    Review
  4. Review
  5. Article
  6. Article
  7. Review
  8. Review
  9. Review
  10. The Past and Future of Inflammation as a Target to Cancer Prevention.Cancer prevention research (Philadelphia, Pa.) · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Review
  15. Article
  16. Article
  17. 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

13 authors.

Jacob GadwaRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.ORCID 0000-0003-0560-2337
Thomas E Bickett *Radiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Laurel B Darragh *Radiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Michael William Knitz *Radiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.ORCID 0000-0002-5786-9837
Shilpa BhatiaRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Miles PiperRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Benjamin Van CourtRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Shiv BhuvaneRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Diemmy NguyenRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Varuna NangiaRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA.
Emily K KleczkoMedicine, University of Colorado Denver-Anschutz Medical Campus, Aurora, Colorado, USA.
Raphael A NemenoffMedicine, University of Colorado Denver-Anschutz Medical Campus, Aurora, Colorado, USA.
Sana D KaramRadiation Oncology, University of Colorado-Anschutz Medical Campus, Aurora, Colorado, USA sana.karam@cuanschutz.edu.

Funding

University of Colorado Anschutz Medical Campus DRCP30DK116073 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI PETER J DEMPSEY · 2020 to 2026
$10.8M
Tackling Treg mediated resistance to radiation and anti-PDL1 in HNSCCsR01DE028529 · NIDCR · WASHINGTON UNIVERSITY · PI SANA D KARAM · 2019 to 2026
$3.7M
Role of EphB4-ephrin-B2 interaction in regulating crosstalk between cancer cell and vascular tumor microenvironment in head and neck cancerR01DE028282 · NIDCR · UNIVERSITY OF COLORADO DENVER · PI KARAM, SANA D · 2019 to 2023
$2.4M
NIDCR NIH HHS R01 DE028282NIDCR NIH HHS R01 DE028529NIDDK NIH HHS P30 DK116073
6 · The paper itself

Abstract

backgroundResistance to therapy is a major problem in treating head and neck squamous cell carcinomas (HNSCC). Complement system inhibition has been shown to reduce tumor growth, metastasis, and therapeutic resistance in other tumor models, but has yet to be explored in the context of HNSCC. Here, we tested the effects of complement inhibition and its therapeutic potential in HNSCC.

methodsWe conducted our studies using two Human Papilloma Virus (HPV)-negative HNSCC orthotopic mouse models. Complement C3aR and C5aR1 receptor antagonists were paired with radiation therapy (RT). Tumor growth was measured and immune populations from tumor, lymph node, and peripheral blood were compared among various treatment groups. Genetically engineered mouse models

resultsIn contrast to established literature, inhibition of complement C3a and C5a signaling using receptor antagonists accelerated tumor growth in multiple HNSCC cell lines and corresponded with increased frequency of regulatory T cell (Treg) populations. Local C3a and C5a signaling has importance for CD4 T cell homeostasis and eventual development into effector phenotypes. Interruption of this signaling axis drives a phenotypic conversion of CD4

conclusionsOur data establish Tregs as a pro-tumorigenic driver during complement inhibition and provide evidence that targeted C3a and C5a receptor inhibition may add therapeutic advantage when coupled with anti-Treg therapy.

Indexed as

AnimalsCell Line, TumorCell ProliferationComplement C3Complement Inactivating AgentsDexamethasoneForkhead Transcription FactorsHead and Neck NeoplasmsHumansLymphocytes, Tumor-InfiltratingMiceMice, Inbred BALB CMice, Inbred C57BLMice, KnockoutReceptor, Anaphylatoxin C5aReceptors, ComplementC3 protein, mouseC5ar1 protein, mouseComplement C3complement C3a receptorComplement Inactivating AgentsDexamethasoneForkhead Transcription FactorsFoxp3 protein, mouseReceptor, Anaphylatoxin C5aReceptors, ComplementimmunotherapyradiotherapyT-lymphocytestumor microenvironment

Identifiers

PMID33789881
PMCPMC8016081

What OpenQuestion holds

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LicenceCC BY-NC
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.