Cited by 2,926CAR-T cell therapy researchImmunotherapy and Immune ResponsesCancer Immunotherapy and Biomarkers

CAR-T cell therapy: current limitations and potential strategies

Open access
Sterner, Robert C., Sterner, Rosalie M.·2021·Blood Cancer Journal

Abstract

Chimeric antigen receptor (CAR)-T cell therapy is a revolutionary new pillar in cancer treatment. Although treatment with CAR-T cells has produced remarkable clinical responses with certain subsets of B cell leukemia or lymphoma, many challenges limit the therapeutic efficacy of CAR-T cells in solid tumors and hematological malignancies. Barriers to effective CAR-T cell therapy include severe life-threatening toxicities, modest anti-tumor activity, antigen escape, restricted trafficking, and limited tumor infiltration. In addition, the host and tumor microenvironment interactions with CAR-T cells critically alter CAR-T cell function. Furthermore, a complex workforce is required to develop and implement these treatments. In order to overcome these significant challenges, innovative strategies and approaches to engineer more powerful CAR-T cells with improved anti-tumor activity and decreased toxicity are necessary. In this review, we discuss recent innovations in CAR-T cell engineering to improve clinical efficacy in both hematological malignancy and solid tumors and strategies to overcome limitations of CAR-T cell therapy in both hematological malignancy and solid tumors.

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Crossref · 10.1038/s41408-021-00459-7

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  • T cell-engaging bispecific antibodies and TCR/CAR-T engineered T cells, contingent on the target, could result in significant off-target tissue destruction, leading to associated morbidity and mortality.

    “Despite their general tolerability, immune checkpoint inhibitors (ICIs) may induce cytokine storms in patients, and T cell-engaging bispecific antibodies and TCR/CAR-T engineered T cells, contingent on the target, could result in significant off-target tissue destruction, leading to associated morbidity and mortality (Sterner and Sterner, 2021; Johnson et al., 2022).”

    From Microphysiological systems as models for immunologically ‘cold’ tumors (2024) · cites this paper as Sterner and Sterner, 2021

    The “On-target off-tumor effects” section (page unavailable) explains that CAR-T cells may target antigens also present on normal tissue, causing toxicity; “CAR-T cell-associated toxicities” reports severe events and some fatalities. The copy does not establish the same tissue-destruction risk for T cell-engaging bispecific antibodies or TCR-engineered T cells, nor does it specifically link the reported fatalities to off-tumor tissue damage. (LLM, conf=0.85)

    Experimental — accuracy not yet measured
  • Various immunotherapeutic strategies have emerged, including adoptive cell transfer, primarily utilizing genetically modified T cells expressing chimeric antigen receptors (CAR T-cells), and adjuvant therapies such as dendritic cell, mRNA, and peptide-based vaccinations, which have the potential to convert 'cold' tumors into immunogenic 'hot' tumors by generating potent cytotoxic T lymphocyte (CTL

    “To address this, various immunotherapeutic strategies have emerged, including adoptive cell transfer, primarily utilizing genetically modified T cells expressing chimeric antigen receptors (CAR T-cells) to recognize and eliminate cancer cells directly (Sterner and Sterner, 2021). Adjuvant therapies, such as dendritic cell, mRNA, and peptide-based vaccinations, aim to boost the patient’s anticancer”

    From Microphysiological systems as models for immunologically ‘cold’ tumors (2024) · cites this paper as Sterner and Sterner, 2021

  • Immune checkpoint inhibitors may induce cytokine storms in patients.

    “Despite their general tolerability, immune checkpoint inhibitors (ICIs) may induce cytokine storms in patients, and T cell-engaging bispecific antibodies and TCR/CAR-T engineered T cells, contingent on the target, could result in significant off-target tissue destruction, leading to associated morbidity and mortality (Sterner and Sterner, 2021; Johnson et al., 2022).”

    From Microphysiological systems as models for immunologically ‘cold’ tumors (2024) · cites this paper as Sterner and Sterner, 2021

    The CAR-T cell-associated toxicities section attributes cytokine-release syndrome to CAR-T cells, not to immune checkpoint inhibitors. The Immunosuppressive microenvironment section discusses checkpoint blockade in combination with CAR-T therapy but does not address whether checkpoint inhibitors induce cytokine storms; searches for checkpoint blockade and cytokine-release toxicity found no such passage. Page numbers were not available in our copy. (LLM, conf=0.76)

    Experimental — accuracy not yet measured

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1 of the 110 references couldn’t be matched to a known paper.

Research works printed but not linked: 1

  1. [60]Peter P. Lee (eds.) Tumor Microenvironment (Springer) https://www.springer.com/gp/book/9783030388614

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Authors
Sterner, R. C., & Sterner, R. M.
Affiliations
Mayo Clinic (US)
Corresponding author
Sterner, Rosalie M.
Venue
Blood Cancer Journal
Published
2021-04-06
Volume
11
Issue
4
Pages
69-69
ISSN
2044-5385 (ISSN-L)
OpenAlex
W3148729173
Cited by
2,926
References
110
Citations by year
2026: 530 · 2025: 806 · 2024: 726 · 2023: 532 · 2022: 287 · 2021: 42 · 2012: 1
FWCI
48.36
Type
journal article
Language
en
Open access
Locations
  • Blood Cancer Journal (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
Funders
  • University of Wisconsin-Madison (T32-GM008692)
  • Regenerative Medicine Minnesota (RMM 012819 EPC 003)
  • National Institute of General Medical Sciences (T32GM008692)
Topics
  • Health Sciences › Medicine › Oncology › CAR-T cell therapy research
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
Keywords
CAR T-cell therapy, chimeric antigen receptor, solid tumors, hematologic malignancies, CAR-T cell engineering, tumor microenvironment, antigen escape, CAR-T toxicity, tumor infiltration
MeSH terms
Receptors, Chimeric Antigen, Animals, Humans, Neoplasms, T-Lymphocytes, Immunotherapy, Adoptive, Hematologic Neoplasms, Tumor Microenvironment

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