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The disability rate of spinal cord injury (SCI) is extremely high, and stem cell inhibition is one of the most effective schemes in treating the spinal cord, but the survival rate is extremely low after stem cell transplantation, so it cannot be widely used in clinic. Studies have revealed that loading stem cells with biological scaffolds can effectively improve the survival rate and effect after stem cell transplantation. Therefore, this research was devised to analyze the repair effect of thiolated chitosan nanocarriers scaffold carrying de-epithelized human amniotic epithelial cells (HAECs) on SCI. And we used thiolated chitosan as nanocarriers, aiming to provide a reliable theoretical basis for future clinical practice. Through experiments, we concluded that the Tarlov and BBB scores of rats with SCI were raised under the intervention of thiolated chitosan carrying HAECs, while the inflammatory factors in serum, oxidative stress reaction in spinal cord tissue, apoptosis rate of nerve cells, and autophagy protein expression were all suppressed. Thus, the thiolated chitosan carrying HAECs may be applied to treat SCI by suppressing autophagy protein expression, oxidative stress response, and release of inflammatory factors in spinal cord tissue, which may be a new clinical therapy for SCI in the future. Even though we cannot understand exactly the therapeutic mechanism of thiolated chitosan carrying HAECs for SCI, the real clinical application of thiolated chitosan carrying HAECs needs to be confirmed by human experiments.

journal of healthcare engineering

Preparation of Drug Sustained-Release Scaffold with De-Epithelized Human Amniotic Epithelial Cells and Thiolated Chitosan Nanocarriers and Its Repair Effect on Spinal Cord Injury