CAR Triggered Release of Type-1 Interferon Limits CAR T-Cell Activities by an Artificial Negative Autocrine Loop
Open accessAbstract
The advent of chimeric antigen receptor (CAR) T cells expedited the field of cancer immunotherapy enabling durable remissions in patients with refractory hematological malignancies. T cells redirected for universal cytokine-mediated killing (TRUCKs), commonly referred to as “fourth generation” CAR T-cells, are designed to release engineered payloads upon CAR-induced T-cell activation. Building on the TRUCK technology, we aimed to generate CAR T-cells with a CAR-inducible artificial, self-limiting autocrine loop. To this end, we engineered CAR T-cells with CAR triggered secretion of type-1 interferons (IFNs). At baseline, IFNα and IFNβ CAR T-cells showed similar capacities in cytotoxicity and cytokine secretion compared to conventional CAR T-cells. However, under “stress” conditions of repetitive rounds of antigen stimulation using BxPC-3 pancreas carcinoma cells as targets, anti-tumor activity faded in later rounds while being fully active in destructing carcinoma cells during first rounds of stimulation. Mechanistically, the decline in activity was primarily based on type-1 IFN augmented CAR T-cell apoptosis, which was far less the case for CAR T-cells without IFN release. Such autocrine self-limiting loops can be used for applications where transient CAR T-cell activity and persistence upon target recognition is desired to avoid lasting toxicities.
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Type-I IFN augmented apoptosis and confined the anti-tumor activity of CAR T cells during repetitive rounds of antigen stimulation.
“Previously, we demonstrated that type-I IFN augmented apoptosis and confined the anti-tumor activity of CAR T cells during repetitive rounds of antigen stimulation [17], which is similar to CAR T cells with ectopic PU.1 expression.”
From Ectopic PU.1 Expression Provides Chimeric Antigen Receptor (CAR) T Cells with Innate Cell Capacities Including IFN-β Release (2024) · cites this paper as [17]
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Cited by
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Harrer, D. C., Eder, M., Barden, M., Pan, H., Herr, W., & Abken, H. (2024) · Cancers · doi:10.3390/cancers16152737 · Cited by 1 · see citing works
Self-citation
- Authors
- Harrer, D. C., Schenkel, C., Bezler, V., Kaljanac, M., Hartley, J., Barden, M., Pan, H., Holzinger, A., Herr, W., & Abken, H.
- Affiliations
- University Hospital Regensburg (DE)
- Leibniz Institute for Immunotherapy (DE)
- Corresponding author
- Harrer, Dennis Christoph
- ORCID
- Venue
- Cells
- Publisher
- MDPI AG
- Published
- 2022-11-30
- Volume
- 11
- Issue
- 23
- Pages
- 3839
- ISSN
- 2073-4409 (ISSN-L)
- PMC
- PMC9737386
- OpenAlex
- W4311001952
- Cited by
- 24
- References
- 0
- Citations by year
- 2026: 10 · 2025: 5 · 2024: 7 · 2023: 2
- FWCI
- 1.46
- Type
- journal article
- Language
- en
- Open access
- gold
- doi.org
- Licence
- Locations
- Cells (publishedVersion, cc-by)
- PubMed Central (publishedVersion, cc-by)
- PubMed (publishedVersion)
- University of Regensburg Publication Server (University of Regensburg) (acceptedVersion)
- DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
- University of Regensburg Publication Server (University of Regensburg)
- Funders
- Deutsche Forschungsgemeinschaft (324392634-TRR221)
- Else-Kröner Fresenius Foundation (324392634-TRR221)
- university of Regensburg intramural (324392634-TRR221)
- Topics
- Health Sciences › Medicine › Oncology › CAR-T cell therapy research
- Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
- Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › CRISPR and Genetic Engineering
- Keywords
- chimeric antigen receptor T cells, type I interferon, trucks, T cell exhaustion, anticancer activity, CAR T cell persistence
- MeSH terms
- Carcinoma, Humans, Interferon Type I, Receptors, Antigen, T-Cell, T-Lymphocytes, Cytokines
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