Specific Stimulation and Multiplex Secretion Analysis of T Cells Using a Suspendable Hydrogel Platform Enables...

Area of Science:

• Immunology
• Cell Biology
• Biotechnology

Background:

• Flow cytometry revolutionized immune system analysis but cannot measure T cell cytokine secretion.
• This limitation hinders understanding T cell function and developing cell therapies for cancer and autoimmune diseases.

Purpose of the Study:

• To develop and validate a single-cell technology (nanovials) for simultaneous assessment of T cell surface markers and cytokine secretion.
• To enable functional evaluation of T cells and inform the engineering of future cell therapies.

Main Methods:

• Developed protein-conjugated nanovials for stimulating and capturing secretions from primary mouse CD8+ T cells.
• Demonstrated specific and nonspecific T cell stimulation using nanovials.
• Showcased simultaneous capture of multiple cytokine secretions and sorting of T cells based on secretion levels.
• Applied the platform to identify phenotypic profiles of interferon gamma (IFNγ)-secreting T cells.

Main Results:

• Nanovials effectively stimulated T cells and captured cytokine secretions.
• The platform enabled simultaneous multi-cytokine detection and cell sorting based on secretion.
• Phenotypic characterization of IFNγ-secreting T cells was achieved prior to stimulation.

Conclusions:

• The nanovial platform provides a comprehensive method for analyzing single-cell T cell function, including cytokine secretion.
• This technology enhances the understanding of T cell mechanistic correlates.
• Nanovials will aid in the design and engineering of advanced cell therapies.