Nondestructive, High-Resolution T Cell Characterization and Subtyping via Deep-UV Microscopy.

Area of Science:

• Immunology
• Microscopy
• Cell Biology

Background:

• T cell characterization is vital for immune function, disease monitoring, and cell therapies.
• Current methods like flow cytometry require labeling and are destructive.
• Existing label-free imaging methods have limitations in speed, specificity, and complexity.

Purpose of the Study:

• To establish deep-ultraviolet (UV) microscopy as a rapid, label-free imaging technique for T cell assessment.
• To evaluate the accuracy of deep-UV microscopy in determining T cell viability, activation state, and subtypes.
• To demonstrate the potential of deep-UV microscopy for high-throughput immune cell analysis.

Main Methods:

• Utilized static deep-UV images to assess T cell viability and activation.
• Employed dynamic deep-UV time-series imaging to quantify intracellular activity for T cell subtyping (CD4+ and CD8+).
• Compared deep-UV microscopy results with flow cytometry for validation.

Main Results:

• Static deep-UV images showed high correlation (R² > 0.97) with flow cytometry for T cell viability and activation.
• Dynamic deep-UV imaging accurately subtyped CD4+ and CD8+ T cells with ~90% sensitivity and specificity.
• Intracellular activity patterns in deep-UV images corresponded to known metabolic differences between T cell subtypes.

Conclusions:

• Deep-ultraviolet (UV) microscopy provides a fast, label-free, and accurate method for T cell characterization.
• This technique has broad applications in immunology research, immune monitoring, and cell-based therapy development.
• Deep-UV microscopy overcomes limitations of current T cell analysis methods, offering a powerful alternative.