001     285421
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024 7 _ |a 10.1126/scitranslmed.adh9562
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037 _ _ |a DKFZ-2023-02366
041 _ _ |a English
082 _ _ |a 500
100 1 _ |a Meng, Zibo
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245 _ _ |a Transcriptome-based identification of tumor-reactive and bystander CD8+ T cell receptor clonotypes in human pancreatic cancer.
260 _ _ |a Washington, DC
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520 _ _ |a Pancreatic ductal adenocarcinoma (PDAC) is generally refractory to immune checkpoint blockade, although patients with genetically unstable tumors can show modest therapeutic benefit. We previously demonstrated the presence of tumor-reactive CD8+ T cells in PDAC samples. Here, we charted the tumor-infiltrating T cell repertoire in PDAC by combining single-cell transcriptomics with functional testing of T cell receptors (TCRs) for reactivity against autologous tumor cells. On the basis of a comprehensive dataset including 93 tumor-reactive and 65 bystander TCR clonotypes, we delineated a gene signature that effectively distinguishes between these T cell subsets in PDAC, as well as in other tumor indications. This revealed a high frequency of tumor-reactive TCR clonotypes in three genetically unstable samples. In contrast, the T cell repertoire in six genetically stable PDAC tumors was largely dominated by bystander T cells. Nevertheless, multiple tumor-reactive TCRs were successfully identified in each of these samples, thereby providing a perspective for personalized immunotherapy in this treatment-resistant indication.
536 _ _ |a 314 - Immunologie und Krebs (POF4-314)
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700 1 _ |a Rodriguez Ehrenfried, Aaron
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700 1 _ |a Tan, Chin Leng
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700 1 _ |a Steffens, Laura Katharina
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700 1 _ |a Kehm, Hannes
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700 1 _ |a Zens, Stefan
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700 1 _ |a Lauenstein, Claudia
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700 1 _ |a Paul, Alina
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700 1 _ |a Schwab, Marius
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700 1 _ |a Förster, Jonas
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700 1 _ |a Salek, Mogjiborahman
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700 1 _ |a Riemer, Angelika
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700 1 _ |a Wu, Heshui
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700 1 _ |a Eckert, Christoph
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700 1 _ |a Leonhardt, Carl-Stephan
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700 1 _ |a Strobel, Oliver
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700 1 _ |a Volkmar, Michael
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700 1 _ |a Poschke, Isabel
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700 1 _ |a Offringa, Rienk
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773 _ _ |a 10.1126/scitranslmed.adh9562
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