Cited by 367Cancer Immunotherapy and BiomarkersViral Infections and Immunology ResearchImmunotherapy and Immune Responses

T cells specific for α-myosin drive immunotherapy-related myocarditis

Open access
Axelrod, Margaret L., Meijers, Wouter C., Screever, Elles M., Qin, Juan, Carroll, Mary Grace, Sun, Xiaopeng, Tannous, Elie, Zhang, Yueli +18 more·2022·Nature

Published version of a preprint

Abstract

Immune-related adverse events, particularly severe toxicities such as myocarditis, are major challenges to the utility of immune checkpoint inhibitors (ICIs) in anticancer therapy 1 . The pathogenesis of ICI-associated myocarditis (ICI-MC) is poorly understood. Pdcd1 –/– Ctla4 +/– mice recapitulate clinicopathological features of ICI-MC, including myocardial T cell infiltration 2 . Here, using single-cell RNA and T cell receptor (TCR) sequencing of cardiac immune infiltrates from Pdcd1 –/– Ctla4 +/– mice, we identify clonal effector CD8 + T cells as the dominant cell population. Treatment with anti-CD8-depleting, but not anti-CD4-depleting, antibodies improved the survival of Pdcd1 –/– Ctla4 +/– mice. Adoptive transfer of immune cells from mice with myocarditis induced fatal myocarditis in recipients, which required CD8 + T cells. The cardiac-specific protein α-myosin, which is absent from the thymus 3 , 4 , was identified as the cognate antigen source for three major histocompatibility complex class I-restricted TCRs derived from mice with fulminant myocarditis. Peripheral blood T cells from three patients with ICI-MC were expanded by α-myosin peptides. Moreover, these α-myosin-expanded T cells shared TCR clonotypes with diseased heart and skeletal muscle, which indicates that α-myosin may be a clinically important autoantigen in ICI-MC. These studies underscore the crucial role for cytotoxic CD8 + T cells, identify a candidate autoantigen in ICI-MC and yield new insights into the pathogenesis of ICI toxicity. Cytotoxic CD8 + T cells specific for α-myosin are identified as pivotal players in myocarditis associated with immune checkpoint inhibitor anticancer therapies.

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  • Autoreactive T cells that recognize α-MyHC naturally develop in every individual.

    “autoreactive T cells that recognize α -MyHC naturally develop in every individual”

    From Autoimmune Myocarditis, Old Dogs and New Tricks. (2024) · cites this paper as [41]

    The section “α-myosin TCRs are found in ICI-MC patients” reports expandable α-myosin-specific T cells in the healthy donors and patients tested. The Discussion says their presence is likely common in humans, but neither passage establishes that these cells naturally develop in every individual. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • The gene for α-MyHC is not expressed in medullary thymic epithelial cells, which are crucial for negative selection during T-cell development.

    “the gene for α -MyHC is not expressed in medullary thymic epithelial cells, which are crucial for negative selection during T-cell development.”

    From Autoimmune Myocarditis, Old Dogs and New Tricks. (2024) · cites this paper as [41]

    In “Myocarditis TCRs recognize α-myosin” (page unavailable), the paper reports no detectable thymic expression of MYH6, the gene encoding α-myosin, and links that absence to escape from negative selection. It describes data on thymic antigen-presenting cells and thymus tissue, but does not specifically establish non-expression in medullary thymic epithelial cells or identify those cells as crucial to negative selection. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Following ICI therapy, 40% of patients with myocarditis experience concomitant myositis, confirmed in mouse models.

    “Following ICI therapy, 40% of patients with myocarditis experience concomitant myositis, confirmed in mouse models. 41,42,46,68,282”

    From Autoimmune Myocarditis, Old Dogs and New Tricks. (2024) · cites this paper as [41]

    The Abstract (page unavailable) says ICI-related myocarditis often co-occurs with myositis, but gives no 40% figure. It also says severe inflammation in the mouse model is specific to the heart, so the model does not confirm concomitant myositis. (LLM, conf=0.88)

    Experimental — accuracy not yet measured
  • Autoreactive T cells targeting α-MyHC may play a pivotal role in the development and progression of ICI myocarditis.

    “Recent animal studies have suggested that autoreactive T cells targeting α -MyHC, rather than tumor antigens, may play a pivotal role in the development and progression of ICI myocarditis”

    From Autoimmune Myocarditis, Old Dogs and New Tricks. (2024) · cites this paper as [41]

    The Abstract and Discussion report that α-myosin-specific CD8+ T cells contribute to myocarditis in the mouse model and suggest α-myosin may be an important autoantigen in patients. The paper does not establish the citing sentence’s contrast with tumor antigens; the Discussion also notes that other antigens may be relevant. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • Abatacept and ruxolitinib are effective in attenuating myocarditis in preclinical models.

    “abatacept (a T-cell costimulation inhibitor) and ruxolitinib (an inhibitor for Janus kinase signaling critical in macrophage-T-cell crosstalk) have been shown to be effective in attenuating myocarditis in preclinical models.”

    From Autoimmune Myocarditis, Old Dogs and New Tricks. (2024) · cites this paper as [41]

    The paper’s Abstract (page unavailable) reports that abatacept attenuated myocarditis and increased survival in a mouse model. Our copy does not report a preclinical myocarditis result for ruxolitinib, so it supports only the abatacept part of the claim. (LLM, conf=0.88)

    Experimental — accuracy not yet measured

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Authors
Axelrod, M. L., Meijers, W. C., Screever, E. M., Qin, J., Carroll, M. G., Sun, X., Tannous, E., Zhang, Y., Sugiura, A., Taylor, B. C., Hanna, A., Zhang, S., Amancherla, K., Tai, W., Wright, J. J., Wei, S. C., Opalenik, S. R., Toren, A. L., Rathmell, J. C., Ferrell, P. B., Phillips, E. J., Mallal, S., Johnson, D. B., Allison, J. P., Moslehi, J. J., & Balko, J. M.
Affiliations
  • Vanderbilt University Medical Center (US)
  • University Medical Center Groningen (NL)
  • University of California, San Francisco (US)
  • University of California, Los Angeles (US)
  • The University of Texas MD Anderson Cancer Center (US)
  • Vanderbilt-Ingram Cancer Center (US)
  • Murdoch University (AU)
Corresponding author
  • Moslehi, Javid J.
  • Balko, Justin M.
Venue
Nature
Published
2022-11-16
Volume
611
Issue
7937
Pages
818-826
ISSN
  • 0028-0836 (ISSN-L)
  • 1476-4687
OpenAlex
W4309413232
Cited by
367
References
65
Citations by year
2026: 102 · 2025: 84 · 2024: 90 · 2023: 83 · 2022: 7
FWCI
27.62
Type
journal article
Language
en
Open access
Locations
  • Nature (publishedVersion)
  • Research Square (acceptedVersion, cc-by)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion, other-oa)
  • PubMed Central (acceptedVersion)
  • Digital Commons-TMC (Texas Medical Center) (submittedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
  • University of Groningen research database (University of Groningen / Centre for Information Technology) (submittedVersion, other-oa)
Funders
  • American Heart Association
  • Vanderbilt University Medical Center
  • National Institutes of Health (1s10od023475-01a1, 1s10od025092-01a1, UL1TR002243)
  • National Heart, Lung, and Blood Institute (K23HL138291, T32HL007895, R01HL141466, R01HL156021, R01HL155990)
  • National Human Genome Research Institute (R01HG010863)
  • National Eye Institute (P30EY008126)
  • National Cancer Institute (F30CA236157, R01CA227481, P30CA016672, P30CA068485, R01CA217987)
  • National Institute of General Medical Sciences (T32GM007347)
  • National Institute of Allergy and Infectious Diseases (P30AI110527, R01AI152183, U01AI154659)
  • National Institute of Diabetes and Digestive and Kidney Diseases (T32DK007061)
  • National Center for Research Resources (UL1RR024975, G20RR030956)
  • National Center for Advancing Translational Sciences
Topics
  • Health Sciences › Medicine › Oncology › Cancer Immunotherapy and Biomarkers
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Viral Infections and Immunology Research
  • Life Sciences › Immunology and Microbiology › Immunology › Immunotherapy and Immune Responses
Keywords
immune checkpoint inhibitor-associated myocarditis, CD8+ T cells, autoantigens, T cell clonotypes, immune-related adverse events, adoptive transfer, cancer immunotherapy toxicity
MeSH terms
Animals, Autoantigens, Immunotherapy, Myocarditis, CD8-Positive T-Lymphocytes, Ventricular Myosins, Mice, CTLA-4 Antigen, Programmed Cell Death 1 Receptor

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