Rational combinatorial targeting by adapter CAR-T-cells (AdCAR-T) prevents antigen escape in acute myeloid leukemia
Targeting AML by chimeric antigen receptor T-cells (CAR-T) is challenging due to the promiscuous expression of AML-associated antigens in healthy hematopoiesis and high degree of inter- and intratumoral heterogeneity. Here, we present single-cell expression data of AML-associated antigens in 30 prim...
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| Hauptverfasser: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
October 2024
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| In: |
Leukemia
Year: 2024, Jahrgang: 38, Heft: 10, Pages: 21832195 |
| ISSN: | 14765551 |
| DOI: | 10.1038/s41375-024-02351-2 |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1038/s41375-024-02351-2 Verlag, kostenfrei, Volltext: https://www.nature.com/articles/s41375-024-02351-2 
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| Verfasserangaben: | Daniel Atar, Lara Ruoff, Anna-Sophia Mast, Simon Krost, Moustafa Moustafa-Oglou, Sophia Scheuermann, Beate Kristmann, Maximilian Feige, Aysegül Canak, Kathrin Wolsing, Lennart Schlager, Karin Schilbach, Latifa Zekri, Martin Ebinger, Daniel Nixdorf, Marion Subklewe, Johannes Schulte, Claudia Lengerke, Irmela Jeremias, Niels Werchau, Joerg Mittelstaet, Peter Lang, Rupert Handgretinger, Patrick Schlegel and Christian M. Seitz |
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| 245 | 1 | 0 | |a Rational combinatorial targeting by adapter CAR-T-cells (AdCAR-T) prevents antigen escape in acute myeloid leukemia |c Daniel Atar, Lara Ruoff, Anna-Sophia Mast, Simon Krost, Moustafa Moustafa-Oglou, Sophia Scheuermann, Beate Kristmann, Maximilian Feige, Aysegül Canak, Kathrin Wolsing, Lennart Schlager, Karin Schilbach, Latifa Zekri, Martin Ebinger, Daniel Nixdorf, Marion Subklewe, Johannes Schulte, Claudia Lengerke, Irmela Jeremias, Niels Werchau, Joerg Mittelstaet, Peter Lang, Rupert Handgretinger, Patrick Schlegel and Christian M. Seitz |
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| 520 | |a Targeting AML by chimeric antigen receptor T-cells (CAR-T) is challenging due to the promiscuous expression of AML-associated antigens in healthy hematopoiesis and high degree of inter- and intratumoral heterogeneity. Here, we present single-cell expression data of AML-associated antigens in 30 primary pediatric AML samples. We identified CD33, CD38, CD371, IL1RAP and CD123 as the most frequently expressed. Notably, high variability was observed not only across the different patient samples but also among leukemic cells of the same patient suggesting the necessity of multiplexed targeting approaches. To address this need, we utilized our modular Adapter CAR (AdCAR) platform, enabling precise qualitative and quantitative control over CAR-T-cell function. We show highly efficient and target-specific activity for newly generated adapter molecules (AMs) against CD33, CD38, CD123, CD135 and CD371, both in vitro and in vivo. We reveal that inherent intratumoral heterogeneity in antigen expression translates into antigen escape and therapy failure to monotargeted CAR-T therapy. Further, we demonstrate in PDX models that rational combinatorial targeting by AdCAR-T-cells can cure heterogenic disease. In conclusion, we elucidate the clinical relevance of heterogeneity in antigen expression in pediatric AML and present a novel concept for precision immunotherapy by combinatorial targeting utilizing the AdCAR platform. | ||
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