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사회과학
자연과학
공학
의약학
농수해양학
예술체육학
복합학
개인구독
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지원사업
학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
커뮤니티
연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
초록·키워드
Disrupting intracellular redox homeostasis combined with immune checkpoint blockade therapy is considered as an effective way to accelerate tumor cell death. However, suppressed tumor immune microenvironment and lower cargo delivery restrict the efficiency of tumor therapy. In this study, a multifunctional tumor microenvironment (TME)-responsive nanocomposite is constructed using manganese tetroxide (Mn<sub>3</sub> O<sub>4</sub> )-decorated disulfide-bond-incorporated dendritic mesoporous organosilica nanoparticles (DMONs) to co-deliver indoleamine 2,3-dioxygenase (IDO) inhibitor Epacadostat (IDOi) and glucose oxidase (GOx) following modification with polyethylene glycol. Owing to the responsiveness of Mn<sub>3</sub> O<sub>4</sub> -decorated DMONs to the mildly acidic and glutathione (GSH) overexpressed TME, the nanocomposite can rapidly decompose and release inner contents, thus substantially improving the cargo release ability. Mn<sub>3</sub> O<sub>4</sub> can effectively catalyze hydrogen peroxide (H<sub>2</sub> O<sub>2</sub> ) decomposition to generate oxygen, enhance the ability of GOx to consume glucose to produce H<sub>2</sub> O<sub>2</sub> , and further promote the generation of hydroxyl radicals (•OH) by Mn<sup>2+</sup> . Furthermore, Mn<sup>2+</sup> -mediated GSH depletion and the production of •OH can disrupt intracellular redox homeostasis, contributing to immunogenic cell death. Simultaneously, IDOi can inhibit IDO to reverse inhibited immune response. The results show that self-amplifying chemodynamic/starvation therapy combined IDO-blockade immunotherapy synergistically inhibits tumor growth and metastasis in vivo.
#Tumor microenvironment
#Chemistry
#Cancer research
#Immunotherapy
#Reactive oxygen species
#Cancer immunotherapy
#Intracellular
#Glucose oxidase
#Immunogenic cell death
#Immune checkpoint
#Programmed cell death
#Glutathione
#T cell
#Hydrogen peroxide
#Immune system
#Blockade
#Cell biology
#Biochemistry
#Receptor
#Apoptosis
#Immunology
#Biology
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