TABLE 2.
Cell Surface Markers of Activation
Leukocyte lineage |
Markers | Protein/function |
---|---|---|
Lymphoid | CD62L | L-selectin |
CD44 | Receptor for hyaluronic acid | |
CD25 | IL-2 low affinity receptor | |
CD69 | Type II membrane protein, C-Lectin family | |
CD71 | Transferrin receptor protein | |
Myeloid | CD11b | Integrin |
CD64a | Fc receptor IgG high affinity | |
CD80 | CD28 and CTLA4 receptor, CD86 tandem | |
CD86 | CD28 and CTLA4 receptor, CD80 tandem | |
HLA-DR | MHC Class II receptor | |
PD-1La | B7 homolog, CD80, CD28, CTLA4 receptor |
Note. Unlike other markers, CD64 and PD-1L do not indicate a state of activation. CD = clusters of differentiation;CTLA 4 = cytotoxic T-lymphocyte antigen 4; Fc = fragment crystallizable; HLA = human leukocyte antigen; IgG = Immunoglobulin G; IL-2 = interleukin 2; MHC = major histocompatibility complex; PD-1L = programmed cell death ligand 1.