Nano-structure of Vitronectin/Heparin on Cell Membrane for Stimulating Single Cell in iPSC-Derived Embryoid Body

Summary Individual cell environment stimulating single cell is suitable strategy for generation of sophisticated multicellular aggregates with localized biochemical signaling. However, such strategy for induced pluripotent stem cell (iPSC)-derived embryoid bodies (EBs) is limited because presence of external stimulation can inhibit spontaneous cellular communication, resulting in misdirection in maturation and differentiation of EBs. In this study, a facile method of engineering the iPSC membrane to stimulate inner cell of EB with maintaining cellular activities is reported. We coated the iPSC surface with nanoscale extracellular matrix fabricated by self-assembly between vitronectin and heparin. This nano-coating allowed iPSC to retain its in vitro properties including adhesion capability, proliferation, and pluripotency during its aggregation. More importantly, the nano-coating induced not lineage-specific differentiation, but increase of E-cadherin expression, resulting in promoted development of EB. This study provides a foundation for future production of sophisticated patient-specific multicellular aggregates through modification of living cell membrane.