Fig. 3

Phenotypic characterization of macrophages in the infrapatellar fat pad (IFP). The stromal vascular fraction (SVF) was isolated from the IFP and macrophages were characterized by flow cytometry. Percentages of CD14⁺ macrophages positive for each specified marker are depicted (N = 6–45) (a). Ex vivo intracellular cytokine production by CD14⁺ macrophages in the IFP is depicted (N = 13) (b). Cytokines were measured in supernatant of unstimulated CD14⁺ from the SVF (N = 2) (c). Median (a and b) or mean (c) is indicated; each dot represents one patient. pt patient