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논문 기본 정보

자료유형
학술저널
저자정보
Qingbin He (School of Radiology Shandong First Medical University & Shandong Academy of Medical Sciences) Runxiao Zheng (Medical Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences) Junchi Ma (School of Radiology Shandong First Medical University & Shandong Academy of Medical Sciences) Luyang Zhao (Medical Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences) Yafang Shi (Medical Science and Technology Innovation Center Shandong First Medical University & Shandong Academy of Medical Sciences) Jianfeng Qiu (School of Radiology the Second Affiliated Hospital of Shandong First Medical University)
저널정보
한국생체재료학회 생체재료학회지 생체재료학회지 제27권
발행연도
2023.3
수록면
872 - 887 (16page)
DOI
https://doi.org/10.1186/s40824-023-00374-x

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Background The activation of the cyclic guanosine monophosphate-adenosine monophosphate synthase stimulator of interferon genes (cGAS-STING) signaling pathway has attracted great attention for its ability to up-regulate innate immune response and thus enhance cancer immunotherapy. However, many STING agonists limit the further advancement of immunotherapy due to weak tumor responsiveness or low activation efficiency. The responsive and effective activation of cGAS-STING signaling in tumors is a highly challenging process. Methods In this study, a manganese-based nanoplatform (MPCZ NPs) was constructed that could responsively and efficiently generate more manganese ions (Mn2+) and reactive oxygen species (ROS) to activate cGAS-STING signaling pathway. Briefly, manganese dioxide (MnO2) was loaded with zinc protoporphyrin IX (ZPP) molecule and coated by polydopamine (PDA) embedded with NH4HCO3 to obtain MPCZ NPs. Additionally, MPCZ NPs were evaluated in vitro and in vivo for their antitumor effects by methyl thiazolyl tetrazolium (MTT) assay and TUNEL assays, respectively. Results In this system, tumor responsiveness was achieved by exogenous (laser irradiation) and endogenous (high levels GSH) stimulation, which triggered the collapse or degradation of PDA and MnO2. Moreover, the release of Mn2+ augmented the cGAS-STING signaling pathway and enhanced the conversion of hydrogen peroxide (H2O2) to hydroxyl radical (·OH) under NIR laser irradiation. Furthermore, the release of ZPP and the elimination of GSH by MPCZ NPs inhibited HO-1 activity and prevented ROS consumption, respectively. Conclusions This adopted open source and reduce expenditure strategy to effectively generate more ROS and Mn2+ to responsively activate cGAS-STING signaling pathway, providing a new strategy for improving immunotherapy.

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