Defining T Cell Subsets in Human Tonsils Using ChipCytometry

Area of Science:

• Immunology
• Cell Biology
• Biotechnology

Background:

• Multiplex imaging techniques are crucial for high-dimensional single-cell analysis.
• ChipCytometry allows iterative staining and photobleaching for multi-marker detection on a single sample.
• Understanding immune cell subsets in tissues and suspensions is vital for disease research.

Purpose of the Study:

• To evaluate ChipCytometry's feasibility for identifying and phenotyping immune cell subsets, including rare types.
• To analyze immune cell architecture in human palatine tonsils using ChipCytometry on tissue sections.
• To dissect human tonsillar T cell subsets from single-cell suspensions using ChipCytometry.

Main Methods:

• Applied ChipCytometry to human palatine tonsil tissue sections for spatial analysis.
• Utilized ChipCytometry on single-cell suspensions from human tonsils for detailed phenotyping.
• Employed unsupervised clustering and supervised manual gating for T cell subset analysis.

Main Results:

• Successfully mapped human tonsil architecture, identifying B and T cell zones and subcompartments.
• Characterized intrafollicular PD1-expressing CD4+ T cells and identified rare mucosal-associated invariant T (MAIT) and γδ-T cells in tonsil tissue.
• Differentiated follicular Th cells and pre-follicular Th cells within PD1+CD4+ T cells and confirmed MAIT cell phenotype in single-cell suspensions.

Conclusions:

• ChipCytometry is a viable method for analyzing single-cell suspensions, providing detailed immune cell phenotyping.
• ChipCytometry allows for spatial context analysis of immune cells within tissue sections.
• This technique offers a powerful approach for dissecting complex immune cell populations in both spatial and non-spatial formats.