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Article Abstract
Natural cell derivates, including cell sheets (CSs) and matrix gels, have opened new opportunities to probe questions in tissue engineering and regenerative medicine. However, the potential of CSs and hydrogels generated by current protocols is still limited by the challenges of heterogeneity and weak mechanical properties. Here, we developed a 21 day long-term serum-free culture system for human embryonic stem cell (hESC)-derived immunity-and-matrix-regulatory cells (IMRCs). The CSs formed with IMRCs (IMRC-CSs) have a much greater secretion capacity for the extracellular matrix (ECM) and stronger mechanical properties than umbilical cord-derived MSCs, with a ten thousand-fold increase in elastin, a higher elastic modulus of 1500 kPa, a thicker structure of 20.59 μm, and a higher fiber count per square millimeter. The IMRC-CSs could promote corneal chemical injury repair and could be turned into injectable temperature-sensitive hydrogels for uterine adhesion repair via a decellularization process. In summary, we have established a high-strength CS platform using human pluripotent stem cells for the first time, providing a facile and scalable engineering approach for regenerative medicine.
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