ArticleCancer immunology, immunotherapy : CII2025
Development and activity of canine B7-H3-CAR.CIK lymphocytes against sarcomas: preclinical evidence and perspectives for human clinical translation.
Article in Cancer immunology, immunotherapy : CII, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Not yet cited in PubMed.
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Corrections and comments
- Erratum issued
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19 authors.
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Abstract
Advanced-stage sarcomas pose a major challenge in oncology, as they are often resistant to conventional therapies and associated with poor prognosis. CAR-based cellular immunotherapy is emerging as a very promising therapeutic option; however, clinically relevant animal models are urgently needed to accelerate the clinical development of these approaches. B7-H3 molecule, due to its low expression in normal tissue, high prevalence in multiple human cancers, and association with cancer stemness and aggressiveness, represents one of the most attractive targets for CAR-immunotherapy. In this study, we established a preclinical cellular immunotherapy platform based on canine cytokine-induced killer cells (CIK) redirected by an antihuman B7-H3 CAR against canine sarcoma cells and 3D sarcoma spheroids. B7-H3 was consistently detected across all analyzed canine sarcoma subtypes, including osteosarcoma, soft tissue sarcoma, and hemangiosarcoma, although with variable levels of expression intensity. We successfully generated canine B7-H3-CAR.CIK, achieving a mean CAR expression of 39% ± 2 with an immune phenotype unmodified (NTD) control (CD3 = 92% ± 3, CD8 = 87% ± 7; CD4 = 49% ± 5; CD5 = 77% ± 0.1; NKp46 = 83% ± 5). Canine B7-H3-CAR.CIK efficiently killed canine sarcoma cell lines compared with NTD.CIK, even at low effector/target (E/T) ratios (B7-H3-CAR.CIK: 45% vs 8%; E:T 1:1; 48 h; N = 7, n = 8; p < 0.0001), and demonstrated significant cytotoxicity against 3D sarcoma spheroids (58% vs 13%; E:T 2:1; 48 h; N = 3, n = 4; p < 0.01). Our findings establish a clinically relevant and translationally valuable platform for evaluating B7-H3-CAR.CIK therapy in dogs with incurable sarcomas, providing a bridge toward the development of novel CAR-based immunotherapies for human incurable sarcomas.
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