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Fluorine assembly nanocluster breaks the shackles of immunosuppression to turn the cold tumor hot
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Fluorine assembly nanocluster breaks the shackles of immunosuppression to turn the cold tumor hot
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Journal Article
Fluorine assembly nanocluster breaks the shackles of immunosuppression to turn the cold tumor hot
2020
Overview
Clinical investigations have shown that a nonimmunogenic “cold” tumor is usually accompanied by few immunopositive cells and more immunosuppressive cells in the tumor microenvironment (TME), which is still the bottleneck of immune activation. Here, a fluorine assembly nanocluster was explored to break the shackles of immunosuppression, reawaken the immune system, and turn the cold tumor “hot.” Once under laser irradiation, FS@PMPt produces sufficient reactive oxygen species (ROS) to fracture the ROS-sensitive linker, thus releasing the cisplatin conjugated PMPt to penetrate into the tumors and kill the regulatory T cells (Tregs) and myeloid-derived suppressor cells (MDSCs). Meanwhile, ROS will induce potent immunogenic cell death (ICD) and further promote the accumulation of dendritic cells (DCs) and T cells, therefore not only increasing the infiltration of immunopositive cells from the outside but also reducing the immunosuppressive cells from the inside to break through the bottleneck of immune activation. The FS@PMPt nanocluster regulates the immune process in TME from negative to positive, from shallow to deep, to turn the cold tumor into a hot tumor and provoke a robust antitumor immune response.
Publisher
National Academy of Sciences
Subject
/ Antineoplastic Agents - chemical synthesis
/ Antineoplastic Agents - pharmacology
/ Dendritic Cells - drug effects
/ Dendritic Cells - immunology
/ Female
/ Immunologic Factors - chemical synthesis
/ Immunologic Factors - pharmacology
/ Mice
/ Myeloid-Derived Suppressor Cells - drug effects
/ Myeloid-Derived Suppressor Cells - immunology
/ Reactive Oxygen Species - metabolism
/ T-Lymphocytes, Regulatory - drug effects
/ T-Lymphocytes, Regulatory - immunology
