Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells.

Area of Science:

• Immunology
• Cellular Metabolism
• Mitochondrial Bioenergetics

Background:

• Immunometabolism is critical for lymphocyte function, differentiation, and fate.
• Bioenergetic analysis is an increasingly important tool for studying lymphocyte biology.

Purpose of the Study:

• To optimize a versatile bioenergetic analysis assay for CD8 T cells.
• To adapt the assay for receptor stimulations using pretreatments and acute injections.
• To enable detailed investigation of cellular metabolism in immune cells.

Main Methods:

• Utilized the Cell Mito Stress Test to measure oxygen consumption and extracellular acidification rates in naïve and effector CD8 T cells.
• Isolated naïve CD8 T cells and derived antigen-specific effector CD8 T cells via ex vivo stimulation.
• Employed microplate pretreatments, sensor cartridge preparation, and injection ports for drug and metabolic modulator delivery.
• Incorporated real-time T-cell receptor stimulation with anti-CD3/CD28 antibodies via acute injection.

Main Results:

• Successfully optimized a bioenergetic assay for CD8 T cell metabolism analysis.
• Demonstrated the capability to assess metabolic capacities and enzyme activity through drug and modulator injections.
• Enabled real-time monitoring of T-cell receptor signaling impacts on cellular metabolism.

Conclusions:

• The optimized protocol provides an extensive dataset for immune cell biology and mitochondrial bioenergetics.
• Researchers can customize this assay to explore various aspects of CD8 T cell metabolism.
• This method enhances the understanding of how immunometabolism influences T cell function.