CD4 and cancer: Furthermore, membrane encapsulation materials inherit the antigen and receptor functions of the source cells and play a role in delivering tumor antigens and promoting anticancer immunity with membrane-encapsulated nanoparticles [63], using mannose-modified cancer cell membrane-encapsulated adjuvant nanoparticles for cancer vaccine administration [64], T cell membrane-encapsulated nanoparticles inheriting CD4 receptors to neutralize HIV infectivity [65].