Biodegradable Ca 2+ Nanomodulators Activate Pyroptosis through Mitochondrial Ca 2+ Overload for Cancer Immunotherapy

作者：Pan Zheng, Binbin Ding, Guo‐Qing Zhu, Chunxia Li, Jun Lin · 发表于：Angewandte Chemie International Edition · 年份：2022 · DOI：10.1002/anie.202204904 · 被引用次数：230 · 研究领域：Inflammasome and immune disorders、Heme Oxygenase-1 and Carbon Monoxide、Curcumin's Biomedical Applications

Abstract Pyroptosis provides a new direction and broad prospects for cancer immunotherapy. However, the development of a nanoplatform as a pyroptosis inducer is limited, and the discovery of a new type of nano‐pyroptosis inducer for cancer immunotherapy is still imminent. Herein, biodegradable Ca 2+ nanomodulators (CaNMs) are prepared as pyroptosis inducers for cancer immunotherapy via mitochondrial Ca 2+ overload. The obtained CaNMs can decompose under low pH to release Ca 2+ and curcumin, leading to a sudden surge in mitochondrial Ca 2+ ions, eventually resulting in pyroptosis. We not only confirm the occurrence of mitochondrial Ca 2+ overload‐triggered pyroptosis for the first time but also reveal the robust immune responses via CaNMs, along with remarkably suppressing tumor proliferation and lung metastasis. This work will provide new strategies and inspiration for pyroptosis‐mediated cancer treatments, greatly contributing to the further development of Ca 2+ nanomodulators.