Cited by 138CAR-T cell therapy researchImmunotherapy and Immune ResponsesT-cell and B-cell Immunology

Comparative analysis of assays to measure CAR T cell-mediated cytotoxicity

Open access
Kiesgen, Stefan, Messinger, John C., Chintala, Navin K., Tano, Zachary, Adusumilli, Prasad S.·2021·Nature Protocols

Abstract

The antitumor efficacy of genetically engineered 'living drugs', including chimeric antigen receptor and T-cell receptor T cells, is influenced by their activation, proliferation, inhibition, and exhaustion. A sensitive and reproducible cytotoxicity assay that collectively reflects these functions is an essential requirement for translation of these cellular therapeutic agents. Here, we compare various in vitro cytotoxicity assays (including chromium release, bioluminescence, impedance, and flow cytometry) with respect to their experimental setup, appropriate uses, advantages, and disadvantages, and measures to overcome their limitations. We also highlight the US Food and Drug Administration (FDA) directives for a potency assay for release of clinical cell therapy products. In addition, we discuss advanced assays of repeated antigen exposure and simultaneous testing of combinations of immune effector cells, immunomodulatory antibodies, and targets with variable antigen expression. This review article should help to equip investigators with the necessary knowledge to select appropriate cytotoxicity assays to test the efficacy of immunotherapeutic agents alone or in combination.

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Crossref · 10.1038/s41596-020-00467-0

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  • A U.S. company that seeks to manufacture CAR T-cells in the U.S. and E.U. must comply with both sets of regulations and work with strict oversight from both the FDA and EMA to meet respective manufacturing standards.

    “A U.S. company that seeks to manufacture CAR T-cells in the U.S. and E.U. must comply with both sets of regulations and work with strict oversight from both the FDA and the European Medicines Agency (EMA) to meet respective manufacturing standards (133,135,136).”

    From Scalable Manufacturing of CAR T Cells for Cancer Immunotherapy (2021) · cites this paper as [133]

    The Introduction’s “Potency assays for clinical cell therapy products” section describes requirements for potency testing and discusses FDA-approved CAR T-cell products. It does not address EMA oversight or say that a U.S. company manufacturing in both the U.S. and E.U. must comply with both sets of manufacturing regulations. (LLM, conf=0.83)

    Experimental — accuracy not yet measured
  • A similar clinical trial phase structure exists in the European Union, although some GMP regulations are stricter in Europe.

    “A similar clinical trial phase structure exists in the European Union, although some GMP regulations are stricter in Europe (132,133).”

    From Scalable Manufacturing of CAR T Cells for Cancer Immunotherapy (2021) · cites this paper as [133]

    The Introduction section on potency assays describes requirements by clinical-study phase but does not compare EU and US trial structures. Searches for European clinical-trial phases and stricter European GMP regulations found no passage addressing either comparison in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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Authors
Kiesgen, S., Messinger, J. C., Chintala, N. K., Tano, Z., & Adusumilli, P. S.
Affiliations
Memorial Sloan Kettering Cancer Center (US)
Corresponding author
Adusumilli, Prasad S.
Venue
Nature Protocols
Published
2021-02-15
Volume
16
Issue
3
Pages
1331-1342
ISSN
  • 1750-2799 (ISSN-L)
  • 1754-2189
OpenAlex
W3132904428
Cited by
138
References
100
Citations by year
2026: 24 · 2025: 37 · 2024: 32 · 2023: 22 · 2022: 18 · 2021: 5
FWCI
2.33
Type
journal article
Language
en
Open access
Locations
  • Nature Protocols (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Cancer Institute (R01CA236615, R01CA235667, P30CA008748, T32CA009501)
Topics
  • Health Sciences › Medicine › Oncology › CAR-T cell therapy research
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Life Sciences › Immunology and Microbiology › Immunology › T-cell and B-cell Immunology
Keywords
chimeric antigen receptor T cells, T cell cytotoxicity, chromium release assay, bioluminescence assay, flow cytometry, potency assay, T cell exhaustion, T cell proliferation, combination immunotherapy, immunomodulatory antibodies, T cell receptor T cells
MeSH terms
Receptors, Chimeric Antigen, Animals, Cytotoxicity Tests, Immunologic, Flow Cytometry, Humans, Receptors, Antigen, T-Cell, T-Lymphocytes, Immunotherapy, Adoptive, Xenograft Model Antitumor Assays

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