Synthesis, characterization, and therapeutic applications of LAP/PDA composite nanomaterials in silk fibroin-based hydrogels for enhanced neuroregeneration in stroke

Abstract

Addressing the devastating and often irreversible effects of stroke necessitates innovative therapeutic strategies that go beyond the limitations of current treatments. This study heralds a promising interdisciplinary approach by employing LAP/PDA composite nanomaterials integrated into silk fibroin-based hydrogels. These engineered materials not only demonstrated significantly enhanced mechanical properties, but also showed excellent biocompatibility when co-cultured with human mesenchymal stem cells (hMSCs). Importantly, the application of these composite hydrogels in stroke models yielded remarkable therapeutic outcomes. The results indicated a substantial reduction in cerebral infarction volumes, improved survival rates of transplanted hMSCs, and increased neurogenesis, underlining their transformative potential in stroke management. Molecular markers such as AQP4, α-DG, and β-DG were also explored, revealing modulated astrocyte activation and cellular signaling pathways. In summary, the composite LAP/PDA nanomaterials, in conjunction with hMSCs and Brain-Derived Neurotrophic Factor (BDNF), unveil a compelling and multifaceted approach for addressing the unmet needs in stroke treatment, thereby opening new avenues in regenerative medicine and tissue engineering.

Keywords

• Stroke
• LAP/PDA composite nanomaterials
• Silk fibroin hydrogels
• Human mesenchymal stem cells
• Brain-derived neurotrophic factor
• Neuroregeneration