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Characterization and Functional Analysis of Tumor-Derived Microparticles
Jingwei Ma1, Ke Tang2, Huafeng Zhang3
1Department of Immunology, Tongji Medical College, Huazhong University of Science & Technology, Wuhan, China.
Abstract:
Microparticles (MPs) are heterogeneous populations of cell-derived vesicles that play an important role in intercellular communications. The release of MPs by tumor cells is a very common event in tumor microenvironments (TMEs). Tumor cell-derived MPs (T-MPs) contain a variety of bioactive molecules, thus modulating various biological processes, including the regulation of immune cell phenotype and function, as well as immune responses. Moreover, T-MPs can be used as natural carriers to deliver therapeutic drugs into tumor cells and immune cells, thus remodeling TMEs and modifying anti-tumor immune responses. These features allow T-MPs to function as potential biomaterials to be applied in tumor immunotherapies and vaccines. This article describes protocols for the isolation of T-MPs from supernatants of cultured tumor cells by multi-step centrifugations. Tools and protocols are also provided in order to characterize and validate the isolated MPs and to analyze the interaction between T-MPs and different target cells. © 2021 The Authors. Current Protocols published by Wiley Periodicals LLC. Basic Protocol 1: Isolation of tumor cell-derived microparticles by multi-step centrifugations Basic Protocol 2: Characterization and validation of tumor cell-derived microparticles Basic Protocol 3: Functional analysis of the uptake of tumor cell-derived microparticles by different cell types.
Insights
Tumor cell-derived microparticles (T-MPs) are key in intercellular communication and can be isolated and characterized. These T-MPs hold potential for tumor immunotherapies and vaccines due to their ability to modulate immune responses.
Area of Science:
- Cell Biology
- Immunology
- Biotechnology
Background:
- Microparticles (MPs) are cell-derived vesicles crucial for intercellular communication.
- Tumor cell-derived microparticles (T-MPs) are prevalent in tumor microenvironments (TMEs) and contain bioactive molecules.
- T-MPs influence immune cell function and responses, and can be utilized as drug delivery vehicles.
Purpose of the Study:
- To provide protocols for isolating, characterizing, and validating T-MPs.
- To outline methods for analyzing T-MP interactions with target cells.
- To explore the potential of T-MPs in tumor immunotherapy and vaccine development.
Main Methods:
- Multi-step centrifugation for T-MP isolation from cultured tumor cells.
- Standardized protocols for characterization and validation of isolated MPs.
- Functional assays to analyze T-MP uptake by various cell types.
Main Results:
- Established protocols for obtaining and validating T-MPs.
- Demonstrated methods for assessing T-MP interactions with target cells.
- Provided a framework for utilizing T-MPs in therapeutic applications.
Conclusions:
- T-MPs are versatile biomaterials with significant potential in cancer immunotherapy and vaccine design.
- The described protocols facilitate research into T-MP biology and therapeutic applications.
- T-MPs can be leveraged to remodel TMEs and enhance anti-tumor immunity.
