Tetrahedral DNA nanostructures synergize with MnO2 to enhance antitumor immunity via promoting STING activation and M1 polarization.
10.1016/j.apsb.2021.12.010
- Author:
Siping LIANG
1
;
Jiaying LI
2
;
Zhengyu ZOU
1
;
Miao MAO
3
;
Siqi MING
1
;
Fan LIN
3
;
Ziyan ZHANG
3
;
Can CAO
1
;
Jinyu ZHOU
1
;
Yuanqing ZHANG
3
;
Jiaping LI
4
;
Minhao WU
1
Author Information
1. Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou 510080, China.
2. Department of Laboratory Medicine, Guangdong Second Provincial General Hospital, Guangzhou 510317, China.
3. Guangdong Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, China.
4. Department of Interventional Oncology, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou 510080, China.
- Publication Type:Journal Article
- Keywords:
Anti-tumor immunity;
Antigen presentation;
Cancer therapy;
M1 polarization;
Manganese;
MnO2;
STING;
Tetrahedral DNA nanostructure
- From:
Acta Pharmaceutica Sinica B
2022;12(5):2494-2505
- CountryChina
- Language:English
-
Abstract:
Stimulator of interferon genes (STING) is a cytosolic DNA sensor which is regarded as a potential target for antitumor immunotherapy. However, clinical trials of STING agonists display limited anti-tumor effects and dose-dependent side-effects like inflammatory damage and cell toxicity. Here, we showed that tetrahedral DNA nanostructures (TDNs) actively enter macrophages to promote STING activation and M1 polarization in a size-dependent manner, and synergized with Mn2+ to enhance the expressions of IFN-β and iNOS, as well as the co-stimulatory molecules for antigen presentation. Moreover, to reduce the cytotoxicity of Mn2+, we constructed a TDN-MnO2 complex and found that it displayed a much higher efficacy than TDN plus Mn2+ to initiate macrophage activation and anti-tumor response both in vitro and in vivo. Together, our studies explored a novel immune activation effect of TDN in cancer therapy and its synergistic therapeutic outcomes with MnO2. These findings provide new therapeutic opportunities for cancer therapy.
