I am trying to compare the immunogenicity of several types of cells in order to predict their likelihood of being rejected when transplanted into an animal host. After a fair bit of reading up and weighing all the pros and cons of different techniques, I have decided to use ELISpot assays with human PBMCs as responder cells. However, my stimulator cells are adherent cells. All the protocols I have seen so far involve stimulator cells that are non-adherent, mainly PBMCs or T-cells from another individual.
Does anyone have any experience doing ELISpot assays with adherent stimulator cells? I imagine that when the stimulator cells adhere to the ELISpot membrane, they would present a physical barrier and block factors secreted by the responder cells from reaching the membrane and thus interfering with spot formation. I would appreciate it greatly if anyone could share some experience or knowledge about this.