A redox-based characterization of human immune cell subsets by polychromatic flow cytometry

Area of Science:

• Immunology
• Cell Biology
• Biochemistry

Background:

• Traditional methods like fluorescent microscopy and immunoblot analysis lack the ability to simultaneously measure cellular redox state in diverse immune cell subsets.
• A need exists for a streamlined assay to assess both antioxidant capacity and reactive oxygen species (ROS) within specific lymphocyte populations.

Purpose of the Study:

• To develop and validate a novel flow cytometry assay for the simultaneous measurement of antioxidant defense systems and reactive oxygen species.
• To enable the characterization of cellular redox states across distinct immune cell types, including T cells, B cells, and natural killer (NK) cells.

Main Methods:

• Peripheral blood mononuclear cells (PBMCs) were prepared and treated.
• Cells underwent surface and intracellular staining using specific dyes and antibodies.
• Standardized flow cytometry machine setup, data acquisition, and analysis protocols were detailed.

Main Results:

• The developed assay successfully measures antioxidant defense markers and ROS levels concurrently within T, B, and NK lymphocytes.
• The protocol provides a comprehensive workflow from cell preparation to data analysis.

Conclusions:

• This flow cytometry assay offers a robust and simultaneous method for assessing cellular redox states in key immune cell subsets.
• The technique facilitates a deeper understanding of immune cell function and regulation by providing simultaneous redox measurements.