Fig. 1From: Cell-derived extracellular vesicles and membranes for tissue repairSchematic of cell therapy, extracellular vesicle (EV) therapy and cell membrane-based therapy. All three types of biomaterials utilized in these therapies could be native or engineered. The engineering techniques include genetic approaches and chemical approaches, which could be applied before or after the isolation process of EVs and cell membraneBack to article page