Volume 18, Issue 41 2203227
Research Article

Metal-Cyclic Dinucleotide Nanomodulator-Stimulated STING Signaling for Strengthened Radioimmunotherapy of Large Tumor

Duo Wang

Duo Wang

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

Search for more papers by this author
Tianqi Nie

Tianqi Nie

Department of Hematology, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, 518107 China

Search for more papers by this author
Cuiqing Huang

Cuiqing Huang

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

Search for more papers by this author
Zerong Chen

Zerong Chen

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

Search for more papers by this author
Xiaocong Ma

Xiaocong Ma

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

Search for more papers by this author
Weiming Fang

Weiming Fang

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

Search for more papers by this author
Yanyu Huang

Corresponding Author

Yanyu Huang

Department of Biochemistry and Molecular Medicine, University of California, Davis, Sacramento, CA, 95817 USA

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
Liangping Luo

Corresponding Author

Liangping Luo

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

Guangdong Second Provincial General Hospital, Jinan University, Guangzhou, 510317 China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
Zeyu Xiao

Corresponding Author

Zeyu Xiao

The Guangzhou Key Laboratory of Molecular and Functional Imaging for Clinical Translation, The First Affiliated Hospital of Jinan University, Guangzhou, 510632 China

E-mail: [email protected]; [email protected]; [email protected]

Search for more papers by this author
First published: 26 August 2022
Citations: 13

Abstract

Combined treatment of immunotherapy and radiotherapy shows promising therapeutic effects for the regression of a variety of cancers. However, even multi-modality therapies often fail to antagonize the regression of large tumors due to the extremely immunosuppressive tumor microenvironment (TME). Here, a radioimmunotherapeutic paradigm based on stimulator of interferon genes (STING)-dependent signaling is applied to preclude large tumor progression by utilizing the metal-cyclic dinucleotide (CDN) nanoplatform, which integrates STING agonist c-di-AMP and immunomodulating microelement manganese (II) within the tannic acid nanostructure (TMA-NPs). As observed by magnetic resonance imaging, the localized administration of TMA-NPs effectively relieves hypoxia within TME and causes radical oxygen species overproduction and apoptosis in cancer cells after exposure to X-ray irradiation. The DNA fragments released from the apoptotic cells after the combined treatment augment the production of endogenous CDNs in cancer cells, hence significantly activating the STING-mediated pathway for stronger anti-tumor immunity. The localized therapy of TMA-NPs + X-ray not only inhibits the primary large tumor progression but also retards distant tumor growth by promoting dendritic cell maturation and activating cytotoxic immune cells whil suppressing immunosuppressive cells. Therefore, this work represents the combinatorial potency of TMA-NPs and X-rays on large tumor regression through strengthened STING-mediated radioimmunotherapeutics.

Conflict of Interest

The authors declare no conflict of interest.

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.