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Sun, Xiaoqi; Zhang, Yu; Li, Jiaqian; Park, Kyung Soo; Han, Kai; Zhou, Xingwu; Xu, Yao; Nam, Jutaek; Xu, Jin; Shi, Xiaoyue; Wei, Lei; Lei, Yu Leo; Moon, James J
Nature nanotechnology, 11/2021, Volume: 16, Issue: 11Journal Article
Nutritional metal ions play critical roles in many important immune processes. Hence, the effective modulation of metal ions may open up new forms of immunotherapy, termed as metalloimmunotherapy. Here, we demonstrate a prototype of cancer metalloimmunotherapy using cyclic dinucleotide (CDN) stimulator of interferon genes (STING) agonists and Mn . We screened various metal ions and discovered specific metal ions augmented STING agonist activity, wherein Mn promoted a 12- to 77-fold potentiation effect across the prevalent human STING haplotypes. Notably, Mn coordinated with CDN STING agonists to self-assemble into a nanoparticle (CDN-Mn particle, CMP) that effectively delivered STING agonists to immune cells. The CMP, administered either by local intratumoural or systemic intravenous injection, initiated robust anti-tumour immunity, achieving remarkable therapeutic efficacy with minute doses of STING agonists in multiple murine tumour models. Overall, the CMP offers a new platform for local and systemic cancer treatments, and this work underscores the great potential of coordination nanomedicine for metalloimmunotherapy.
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