A Metal–Phenolic Nanocoordinator Launches Radiotherapeutic Cancer Pyroptosis Through an Epigenetic Mechanism

Author:

Wang Guohao12,Li Bei12,Tian Hao12,Xie Lisi12,Yan Jie12,Sang Wei12,Li Jie12,Zhang Zhan12,Li Wenxi12,Dai Yunlu12ORCID

Affiliation:

1. Cancer Centre and Institute of Translational Medicine, Faculty of Health Sciences University of Macau Macau SAR 999078 China

2. MoE Frontiers Science Center for Precision Oncology University of Macau Macau SAR 999078 China

Abstract

AbstractRadiotherapy, although clinically effective in immunoactivation, still cannot radio‐functionalize tumor as a potent immunogenetic center. Given that newly found pyroptosis efficiently releases immunogenic damage‐associated molecular patterns, initiating radiotherapeutic pyroptosis may turn a vision of radiotherapy‐induced immunity into reality. However, a precondition is that the absent gasdermin E (GSDME), which essentiates in caspase‐3‐mediated pyroptosis, can be well translated in cancer cells. Here, an epigenetic strategy to launch cancer pyroptosis in radiotherapy is introduced. The nanocoordinator (PWE) is constructed via a metal–phenolic coordination between polyphenolic DNA methyltransferase inhibitor (epigallocatechin‐3‐gallate, EGCG), high‐Z radiosensitizer (W6+), and polyphenol‐modified block copolymer. While recovering GSDME expression by EGCG, PWE cleaves GSDME into fragmented GSDME N‐terminal (pyroptotic key protein) via radiotherapeutic caspase‐3. To examine anti‐tumor immune activities, PWE amplifies immunological effects of traditional radiotherapy and decreases radiotherapy‐upregulated regulatory T cells, providing new insight into tumor radiotherapy.

Funder

National Natural Science Foundation of China

Universidade de Macau

Publisher

Wiley

Subject

Electrochemistry,Condensed Matter Physics,Biomaterials,Electronic, Optical and Magnetic Materials

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