{"id":231746,"date":"2026-02-20T21:20:32","date_gmt":"2026-02-21T03:20:32","guid":{"rendered":"https:\/\/lifeboat.com\/blog\/2026\/02\/immune-checkpoint-inhibitor-induced-myocarditis-is-dependent-on-cd8-t-cell-derived-tnf-and-tnfr2-signaling"},"modified":"2026-02-20T21:20:32","modified_gmt":"2026-02-21T03:20:32","slug":"immune-checkpoint-inhibitor-induced-myocarditis-is-dependent-on-cd8-t-cell-derived-tnf-and-tnfr2-signaling","status":"publish","type":"post","link":"https:\/\/lifeboat.com\/blog\/2026\/02\/immune-checkpoint-inhibitor-induced-myocarditis-is-dependent-on-cd8-t-cell-derived-tnf-and-tnfr2-signaling","title":{"rendered":"Immune checkpoint inhibitor\u2013induced myocarditis is dependent on CD8 T cell\u2013derived TNF and TNFR2 signaling"},"content":{"rendered":"<p style=\"padding-right: 20px\"><a class=\"aligncenter blog-photo\" href=\"https:\/\/lifeboat.com\/blog.images\/immune-checkpoint-inhibitor-induced-myocarditis-is-dependent-on-cd8-t-cell-derived-tnf-and-tnfr2-signaling.gif\"><\/a><\/p>\n<p>Kathrynne Warrick, Chandrashekhar Pasare et al. show that PD-1 blockade leads to de novo priming of self-reactive CD8 T cells resulting in immune related adverse events.<\/p>\n<hr>\n<p>Immune checkpoint inhibitors (ICIs) improve cancer survival but can trigger immune-related adverse events. Among these, fulminant myocarditis is an often fatal complication with limited therapies. We developed a mouse model employing cardiomyocyte-restricted antigen expression to define how ICIs drive cardiac autoimmunity. Combined cytotoxic T cell antigen-4 (\u03b1CTLA-4) and programmed death-1 (\u03b1PD-1) blockade uniquely induced robust expansion of antigen-specific CD8 T cells, myocardial inflammation, and lethal arrhythmias. PD-1 blockade alone permitted the priming and effector differentiation of naive autoreactive CD8 T cells, whereas concomitant CTLA-4 inhibition amplified cardiac pathology. Unexpectedly, myocardial injury was independent of perforin-mediated cytotoxicity but critically depended on T cell\u2013derived TNF, which promoted myeloid recruitment, cytokine production, and arrhythmogenesis. Genetic ablation of CD8 T cell\u2013derived tumor necrosis factor (TNF) or TNF receptor 2 (TNFR2) blockade prevented cardiotoxicity while preserving antitumor efficacy. These findings establish a TNF-TNFR2\u2013driven inflammatory circuit downstream of autoreactive CD8 T cells as a central mechanism of ICI myocarditis and a strategy to uncouple cardiotoxicity from immunotherapy benefits.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kathrynne Warrick, Chandrashekhar Pasare et al. show that PD-1 blockade leads to de novo priming of self-reactive CD8 T cells resulting in immune related adverse events. Immune checkpoint inhibitors (ICIs) improve cancer survival but can trigger immune-related adverse events. Among these, fulminant myocarditis is an often fatal complication with limited therapies. We developed a mouse [\u2026]<\/p>\n","protected":false},"author":662,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11,412],"tags":[],"class_list":["post-231746","post","type-post","status-publish","format-standard","hentry","category-biotech-medical","category-genetics"],"_links":{"self":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/231746","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/users\/662"}],"replies":[{"embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/comments?post=231746"}],"version-history":[{"count":0,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/posts\/231746\/revisions"}],"wp:attachment":[{"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/media?parent=231746"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/categories?post=231746"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lifeboat.com\/blog\/wp-json\/wp\/v2\/tags?post=231746"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}