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Published on: June 13, 2014
Reprogramming Macrophage Function via Cholesterol Modulation and Redox Signaling Using a Multifunctional Nanoplatform
Xuemei Zeng1, Shumin Tang1, Guosheng Hu1
1Key Laboratory of Microbial Pathogenesis and Interventions of Fujian Province University, Biomedical Research Center of South China, Biomedical Research Center of South China, College of Life Sciences, Fujian Normal University, 1 Keji Road, Fuzhou 350117, PR China.
This study introduces CuMPmC, a novel nanoplatform that targets breast cancer recurrence and infection by reprogramming macrophages. It reduces cholesterol in M2 macrophages, promoting an anti-tumor M1 phenotype for improved recovery.
Area of Science:
- Biomaterials Science
- Cancer Immunotherapy
- Nanotechnology
Background:
- Postoperative breast cancer recurrence and infection are significant clinical challenges.
- Macrophage dysfunction, particularly cholesterol-mediated, contributes to tumor progression and impaired immunity.
- Targeting macrophage polarization is a promising strategy for cancer treatment.
Purpose of the Study:
- To develop a multifunctional nanoplatform, CuMPmC, for modulating macrophage function.
- To investigate CuMPmC's ability to deplete cholesterol in M2-like macrophages and induce M1 polarization.
- To evaluate CuMPmC's efficacy in reducing postoperative tumor recurrence and infection.
Main Methods:
- Construction of CuMPmC via copper-dopamine chelation and self-polymerization, functionalized with mannose.
- Loading of cholesterol oxidase (ChOx) into the nanoplatform for cholesterol depletion and ROS generation.
- In vitro and in vivo studies, including transcriptomic profiling, to assess macrophage migration, phagocytosis, and polarization.
Main Results:
- CuMPmC effectively depletes macrophage membrane cholesterol, enhancing membrane fluidity and chemotaxis.
- ChOx and copper ions generate ROS, polarizing macrophages to an M1 phenotype, enhancing tumor cell and pathogen clearance.
- CuMPmC treatment significantly reduced postoperative tumor recurrence and infection in murine models.
Conclusions:
- Cholesterol metabolism plays a critical role in reprogramming macrophage function in breast cancer.
- CuMPmC represents a novel dual-action immunotherapeutic strategy for postoperative breast cancer management.
- This nanoplatform offers a promising approach to enhance host defense and reduce recurrence.
