High Dimensional Imaging Mass Cytometry Panel to Visualize the Tumor Immune Microenvironment Contexture

Area of Science:

• Oncology
• Immunology
• Biotechnology

Background:

• Understanding the tumor immune microenvironment (TiME) is crucial for cancer progression research.
• High-dimensional imaging techniques are needed for comprehensive in situ analysis of TiME.

Purpose of the Study:

• To design and validate a 39-antibody Imaging Mass Cytometry (IMC) panel for human tumor sections.
• To provide an optimized protocol for IMC staining and experimental workflow.
• To enable detailed analysis of TiME components and their interactions.

Main Methods:

• Development of a 39-antibody IMC panel for formalin-fixed paraffin-embedded human tumor tissues.
• Optimization of the staining procedure and experimental workflow for IMC.
• Application of IMC for multiparametric in situ exploration of TiME at a single-cell level.

Main Results:

• The IMC panel successfully deciphers immune cell types and functions within the tumor microenvironment.
• It reveals interactions between immune cells, tumor cells, cancer-associated fibroblasts, nerve fibers, and extracellular matrix proteins.
• The panel allows for the microanatomical mapping of TiME components.

Conclusions:

• The developed IMC panel is a powerful tool for fundamental and clinical cancer research.
• It facilitates the identification of prognostic biomarkers and mechanisms of resistance to immunotherapies.
• This approach enhances the in situ understanding of tumor progression and immune cell dynamics.