Which panels are used in flow cytometry to identify T cell subsets by co-expression of markers?

Which panels are used in flow cytometry to identify T cell subsets by co-expression of markers?

• A. CD3/CD4 and CD3/CD8 panels
• B. CD19/CD56 panels
• C. CD14/CD16 panels
• D. CD3/CD19 panels

Answer: (A)

In flow cytometry, identifying T cell subsets comes from using a T cell marker together with markers for the subsets. CD3 marks T cells, so you gate on CD3+ cells and then look at CD4 to identify helper T cells and CD8 to identify cytotoxic T cells. Panels that pair CD3 with CD4 and CD3 with CD8 let you define these two main T cell subsets directly. Panels with CD19 and CD56 target B cells and NK cells, not T cell subsets. Panels with CD14 and CD16 focus on monocytes. A combination like CD3/CD19 would mix T cells and B cells and wouldn’t delineate the helper vs cytotoxic T populations.

In flow cytometry, identifying T cell subsets comes from using a T cell marker together with markers for the subsets. CD3 marks T cells, so you gate on CD3+ cells and then look at CD4 to identify helper T cells and CD8 to identify cytotoxic T cells. Panels that pair CD3 with CD4 and CD3 with CD8 let you define these two main T cell subsets directly.

Panels with CD19 and CD56 target B cells and NK cells, not T cell subsets. Panels with CD14 and CD16 focus on monocytes. A combination like CD3/CD19 would mix T cells and B cells and wouldn’t delineate the helper vs cytotoxic T populations.