Article
作者: Shaw, Lauren ; Huang, Shuo ; Minutolo, Nicholas ; Schott, Benjamin ; Qureshi, Rehman ; Pierini, Stefano ; Griffin, Crystal ; Sonawane, Poonam ; Varghese, Bindu ; Ceeraz DeLong, Sabrina ; Cushing, Daniel ; Sloas, Christopher ; Nagar, Karan ; Shestova, Olga ; Abramson, Sascha ; Klichinsky, Michael ; Ross, Kayleigh ; Blumenthal, Daniel ; Ciccaglione, Kerri ; Levitsky, Hyam ; Chhum, Sotheavy ; Worth, Alison ; Cornell, Linara ; Ball, Michael ; Gill, Saar ; Oliveira-Nunes, Maria Cecilia ; Condamine, Thomas ; Lian, Lurong ; Gabbasov, Rashid ; Zentner, Isaac ; Yashiro-Ohtani, Yumi
We previously developed human CAR macrophages (CAR-M) and demonstrated redirection of macrophage anti-tumor function leading to tumor control in immunodeficient xenograft models. Here, we develop clinically relevant fully immunocompetent syngeneic models to evaluate the potential for CAR-M to remodel the tumor microenvironment (TME), induce T cell anti-tumor immunity, and sensitize solid tumors to PD1/PDL1 checkpoint inhibition. In vivo, anti-HER2 CAR-M significantly reduce tumor burden, prolong survival, remodel the TME, increase intratumoral T cell and natural killer (NK) cell infiltration, and induce antigen spreading. CAR-M therapy protects against antigen-negative relapses in a T cell dependent fashion, confirming long-term anti-tumor immunity. In HER2+ solid tumors with limited sensitivity to anti-PD1 (aPD1) monotherapy, the combination of CAR-M and aPD1 significantly improves tumor growth control, survival, and remodeling of the TME in pre-clinical models. These results demonstrate synergy between CAR-M and T cell checkpoint blockade and provide a strategy to potentially enhance response to aPD1 therapy for patients with non-responsive tumors.