Abstract
Flow cytometry is a fluorescence-based technology that allows for the identification and characterization of immune cell subsets within a heterogenous population. Briefly, isolated immune cells are stained in suspension with fluorescently tagged antibodies to identify cells of interest prior to being run through a flow cytometer. Here we describe how to isolate murine immune cells from various body regions, including the inguinal lymph nodes (ILNs), spleen, thymus, and peripheral blood, and tag them with primary fluorescent antibodies for flow cytometric analysis of CD4+ and CD8+ T cell populations. This chapter also details how to use flow cytometry to measure T cell expression of chemokine receptor 7 (CCR7), the major chemokine receptor lymphocytes use to enter lymph nodes. The methods described in this chapter can be used for characterizing other proteins of interest, as well as other immune cell subsets.
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