I need to work on in vitro tumor model that will some what similar to the natural tumor. In the model to develop, macrophage (M2 phage) is very crucial including other cells that generally reside in tumor microenvironment in vivo.
I have used aggre well plates in the past for controlled cell number, density, identical size and shape of human ESC and iPSCs for the production of embryoid bodies (spherical 3D structures). maybe it'll be worth having a look.
please, have a look at cellecbiotek.com where our U-CUP bioreactor allows to culture different types of cells on 3D porous scaffold of different materials. We have also experience in macrophages culture.