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Uptake of New Lipid-coated Nanoparticles Containing Falcarindiol by Human Mesenchymal Stem Cells
Published on: February 9, 2019
Cascade Delivery to Golgi Apparatus and On-Site Formation of Subcellular Drug Reservoir for Cancer Metastasis
Liqiang Chen1, Peihang Jiang1, Xinran Shen1
1Key Laboratory of Drug-Targeting and Drug Delivery System of the Education Ministry and Sichuan Province, Sichuan Engineering Laboratory for Plant-Sourced Drug and Sichuan Research Center for Drug Precision Industrial Technology, West China School of Pharmacy, Sichuan University, Chengdu, 610041, P. R. China.
Abstract:
As the foremost cause of cancer-related death, metastasis consists of three steps: invasion, circulation, and colonization. Only targeting one single phase of the metastasis cascade may be insufficient since there are many alternative routes for tumor cells to disseminate. Here, to target the whole cascade of metastasis, hybrid erythrocyte and tumor cell membrane-coated nanoparticle (Hyb-NP) is designed with dual functions of increasing circulation time and recognizing primary, circulating, and colonized tumors. After loading with monensin, a recently reported metastasis inhibitor, the delivery system profoundly reduces spontaneous metastasis in an orthotopic breast cancer model. Underlying mechanism studies reveal that Hyb-NP can deliver monensin to its action site in the Golgi apparatus, and in return, monensin can block the exocytosis of Hyb-NP from the Golgi apparatus, forming a reservoir-like subcellular structure. Notably, the Golgi apparatus reservoir displays three vital functions for suppressing metastasis initialization, including enhanced subcellular drug retention, metastasis-related cytokine release inhibition, and directional migration inhibition. Collectively, based on metastasis cascade targeting at the tissue level, further formation of the Golgi apparatus drug reservoir at the subcellular level provides a potential therapeutic strategy for cancer metastasis suppression.
Insights
This study introduces a hybrid nanoparticle that targets the entire cancer metastasis cascade. The nanoparticle delivers a drug to the Golgi apparatus, creating a reservoir that inhibits tumor cell spread.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Cancer Research
Background:
- Cancer metastasis is the primary cause of cancer-related death.
- Targeting individual steps of metastasis is insufficient due to alternative dissemination routes.
- A novel therapeutic strategy is needed to address the entire metastasis cascade.
Purpose of the Study:
- To design and evaluate a hybrid nanoparticle system for comprehensive targeting of cancer metastasis.
- To investigate the mechanism of action of the nanoparticle-drug complex in suppressing metastasis.
Main Methods:
- Development of hybrid erythrocyte and tumor cell membrane-coated nanoparticles (Hyb-NP) loaded with monensin.
- Evaluation of Hyb-NP efficacy in an orthotopic breast cancer model.
- Subcellular localization and mechanism studies of monensin delivery to the Golgi apparatus.
Main Results:
- Hyb-NP demonstrated dual functions: increased circulation time and recognition of tumors at all metastatic stages.
- Monensin delivery to the Golgi apparatus inhibited metastasis.
- The Golgi apparatus formed a drug reservoir, enhancing drug retention and inhibiting metastasis-related cytokine release and directional migration.
Conclusions:
- The developed Hyb-NP system effectively targets the entire metastasis cascade.
- Formation of a Golgi apparatus drug reservoir offers a novel subcellular-level strategy for cancer metastasis suppression.
- This approach presents a promising therapeutic avenue for combating cancer metastasis.
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