Abstract
Graphdiyne oxide (GDYO) nanosheets have remarkable electronic, mechanical, and thermal properties, which is hoped to act a better alternative for biomedical applications. Tumor-associated macrophage (TAM) is a promising cell population for nanotechnology application to cancer immunotherapy. In the present study, we found M2-like macrophages can be polarized to kill cancer cells with GDYO treatment via activation of pro-inflammatory pathways and GDYO injected intraperitoneally reduced tumor growth in a melanoma-bearing mouse model. In addition, GDYO activated cytotoxic T cells either directly or indirectly via macrophages, enhancing checkpoint inhibitor response in a breast cancer model. We expect that GDYO has invoked both the innate and adaptive arms of the immune system that are likely to enhance efficacy of cancer immunotherapy.
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