Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 12, Issue 41, Pages 45772-45788Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c12580
Keywords
Mn-etched dendritic mesoporous silicon; tumor microenvironment responsive; biodegradation; catalytic cascade; magnetic resonance imaging; synergistic therapy
Funding
- National Natural Science Foundation of China [NSFC 51972075, 51972076, 51772059, 51902066]
- Natural Science Foundation of Heilongjiang Province [QC2016009]
- Special Innovation Talents of Harbin Science and Technology [2017RAQXJ171]
- China Postdoctoral Science Foundation [2019M650063]
- Ph.D. Student Research and Innovation Fund of the Fundamental Research Funds for the Central Universities [3072019GIP1014]
- Fundamental Research funds for the Central Universities
Ask authors/readers for more resources
The endogenous tumor microenvironment (TME can signally influence the therapeutic effects of cancer, so it is necessary to explore effective synergistic therapeutic strategies based on changing of the TME. Here, a catalytic cascade nanoplatform based on manganese (Mn)-etched dendritic mesoporous silicon nanoparticles (designated as DMMnSiO3 NPs) loaded with indocyanine green (ICG) and natural glucose oxidase (GOD) is established (designated as DIG nanocomposites). As the Mn-O bonds in DMMnSiO3 NPs are susceptive to mildly acidic and reducing environments, the DIG nanocomposites can be rapidly decomposed because of the biodegradation of DMMnSiO3 NPs once internalized into the tumor by the consumption of glutathione (GSH) in TME to weaken the antioxidant capability of the tumors. The released Mn2+ could catalyze endogenous hydrogen peroxide (H2O2) to generate oxygen O-2) to relieve the hypoxia in TME. The generation of O-2 may promote the catalyzed oxidation of glucose by GOD, which will cut off nutrient supplies, accompanied by the regeneration of H2O2. The regenerated H2O2 could be sequentially catalyzed by Mn to compensate for the consumed O-2, and thus, the catalytic cascade process between Mn and GOD was set up. As a result, a synergistic therapeutic strategy based on T-1-weighted magnetic resonance imaging (MRI) of Mn', starvation therapy by O(2 )compensation enhanced catalyzing glucose, dual-model (GSH consumption and O-2 compensation) enhanced photodynamic therapy, and effective photothermal therapy of ICG (eta = 23.8%) under 808 nm laser irradiation has been successfully established.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available