Analysis of the Stromal Cellular Components of the Solid Tumor Microenvironment Using Flow Cytometry

Area of Science:

• Oncology
• Immunology
• Cell Biology

Background:

• The tumor microenvironment (TME) comprises diverse cell types crucial for cancer progression.
• Understanding the contribution of each cell type within the TME is a key area in cancer research.
• Characterizing the cellular composition of the TME is essential for developing effective cancer therapies.

Purpose of the Study:

• To establish robust protocols for dissociating solid tumor tissues and Matrigel plugs into single-cell suspensions.
• To enable detailed immunophenotypic analysis of various host cell populations within the TME using flow cytometry.
• To facilitate a deeper understanding of the complex interactions between tumor cells and host cells in the TME.

Main Methods:

• Development and validation of protocols for mechanical and enzymatic dissociation of tumor tissues.
• Adaptation of dissociation protocols for Matrigel plugs used in tumor implantation models.
• Application of flow cytometry for the immunophenotypic characterization of key TME cell populations, including myeloid-derived suppressor cells, endothelial cells, and macrophages.

Main Results:

• Successfully generated single-cell suspensions from diverse solid tumors (human and mouse) and Matrigel plugs.
• Demonstrated the utility of flow cytometry for quantifying and characterizing specific immune and stromal cell populations within the TME.
• Provided a comprehensive workflow for analyzing the cellular landscape of the TME.

Conclusions:

• The described protocols offer a reliable method for TME single-cell preparation and analysis.
• These methods enhance the ability to study tumor-host cell interactions and their role in cancer.
• This work provides a foundation for further research into TME composition and therapeutic targeting.