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- W3206626372 abstract "Despite the success of immunotherapy in many types of cancer, pancreatic adenocarcinoma (PDAC) has yet to benefit. Innate immune cells are critical to antitumor immunosurveillance and recent studies have revealed that these populations possess a form of memory, termed trained innate immunity, which occurs through transcriptomic, epigenetic, and metabolic reprograming. Though trained innate immunity has mostly been investigated in the context of infection, the induction of trained innate immunity could also protect against tumors, and specifically pancreatic tumors. Here, we demonstrate that yeast-derived particulate β-glucan, a known inducer of trained immunity, traffics to the pancreas following IP administration. This causes a CCR2-dependent influx of newly characterized monocytes/macrophages to the pancreas which display features of trained immunity. These trained cells can be activated upon exposure to tumor cells and tumor-derived factors, and show enhanced phagocytosis and ROS-mediated cytotoxicity against pancreatic tumors. In orthotopic models of pancreatic cancer, mice trained with β-glucan show reduced tumor burden and prolonged survival which is further enhanced when combined with anti-PD-L1 immunotherapy. Cumulatively, these findings not only add novel characterization to the dynamic mechanisms, scope and localization of peripheral trained immunity, but also identify a direct application of trained immunity to cancer that can be utilized directly within the pancreas to reprogram the immunologically cold tumor microenvironment of PDAC." @default.
- W3206626372 created "2021-10-25" @default.
- W3206626372 creator A5081093808 @default.
- W3206626372 date "2021-11-30" @default.
- W3206626372 modified "2023-09-24" @default.
- W3206626372 title "Harnessing the power of trained immunity in the setting of pancreatic cancer: a novel mechanism of immune trafficking and tumor control." @default.
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