Figure 6.

(a) Schematic illustration of tumor microenvironment, consisting of multiple types of cells. Reprinted with permission from ref. [46]. Copyright 2016 Springer Nature; (b) Optical (left) and fluorescent (right) microscopic images of microgels encapsulated with varying amounts of macrophages co-cultured with MCF-7 cells (scale bar: 50 um). The cells were fluorescently labeled to visualize live (green) and dead (red) cells.