4.4 Article

An effective dual-factor modified 3D-printed PCL scaffold for bone defect repair

Publisher

WILEY
DOI: 10.1002/jbm.b.34555

Keywords

aspirin; BFP-1; bone regeneration; drug delivery system; liposomes

Funding

  1. State Key Laboratory of Military Stomatology [2016KA01]
  2. Peking University's 985 Grant
  3. National Natural Science Foundation of China [81571814]

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Numerous bioactive molecules produced in cells are involved in the process of bone formation. We consider that appropriate, simultaneous application of two types of bioactive molecules would accelerate the regeneration of tissues and organs. Therefore, we combined aspirin-loaded liposomes (Asp@Lipo) and bone forming peptide-1 (BFP-1) on three dimensional-printed polycaprolactone (PCL) scaffold and determined whether this system improved bone regeneration outcomes. in vitro experiments indicated that Asp@Lipo/BFP-1at a 3:7 ratio was the best option for enhancing the osteogenic efficiency of human mesenchymal stem cells (hMSCs). This was confirmed in an in vivo cranial defect animal model. In addition, RNA-Seq was applied for preliminarily exploration of the mechanism of action of this composite scaffold system, and the results suggested that it mainly improved bone regeneration via the PI3K/AKT signaling pathway. This approach will have potential for application in bone tissue engineering and regenerative medicine.

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