Three-dimensional printing of bioceramic-induced macrophage exosomes: immunomodulation and osteogenesis/angiogenesis
Source abstract
Abstract
Abstract Exosomes have attracted increasing attention in tissue regeneration and repair due to their roles in intercellular communication. Developing a customized delivery system is key to exosome-based regenerative therapeutics. Bioceramics play an important role in the immunomodulation of macrophages. Here, three-dimensional (3D) printing was applied to construct porous scaffolds with β-tricalcium phosphate (β-TCP) bioceramic-induced macrophage exosomes (BC-Exos). The three-dimensional-printed BC-Exo scaffolds, exhibiting a predefined structure and persistent release of exosomes, displayed distinct immunomodulatory effects and improved osteogenesis/angiogenesis. The BC-Exos in the printed scaffolds modulated macrophage polarization and the expression of chemokines for the recruitment of bone marrow mesenchymal stem cells (BMSCs) and endothelial cells. Scaffolds with BC-Exos from macrophages with a mixed phenotype significantly enhanced the osteogenic differentiation and immunosuppression of BMSCs and improved the angiogenic activity of human umbilical vein endothelial cells in vitro. For the potential mechanism, β-TCP bioceramics have an important effect on the immunomodulation of macrophages by regulating gene expression, increasing exosome production, and altering exosomal miRNA cargos, thereby affecting the paracrine effects of BC-Exos on immunomodulation and osteogenesis/angiogenesis. This study suggests that 3D printing of bioceramic-induced macrophage exosomes may be a useful strategy for tissue engineering and regenerative medicine.
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Research context
OpenAlex topics: Extracellular vesicles in disease · RNA Interference and Gene Delivery · Tissue Engineering and Regenerative Medicine
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (43)
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