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Dexamethasone Loaded Multi-Layer Poly-L-Lactic Acid/Pluronic P123 Composite Electrospun Nanofiber Scaffolds for Bone Tissue Engineering and Drug Delivery Publisher Pubmed



Birhanu G1, 2 ; Tanha S3 ; Akbari Javar H3 ; Seyedjafari E4 ; Zandikarimi A4 ; Kiani Dehkordi B3
Authors
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Authors Affiliations
  1. 1. Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, International Campus (TUMS-IC), Tehran, Iran
  2. 2. School of Pharmacy, College of Health Sciences, Addis Ababa University, Addis Ababa, Ethiopia
  3. 3. Department of Pharmaceutics, Faculty of Pharmacy, Tehran University of Medical Sciences, Tehran, Iran
  4. 4. Department of Biotechnology, College of Science, University of Tehran, Tehran, Iran

Source: Pharmaceutical Development and Technology Published:2019


Abstract

In tissue engineering, it is common to mix drugs that can control proliferation and differentiation of cells into polymeric solutions as part of composite to get bioactive scaffolds. However, direct incorporation of drugs might potentially result in undesired burst release. To overcome this problem, here we developed electrospun multilayer drug loaded poly-l-lactic acid/pluronic P123 (PLLA–P123) composite scaffolds. The drug was loaded into the middle layer. The surface, the mechanical and physiochemical properties of the scaffolds were evaluated. The drug release profiles were monitored. Finally, the osteogenic proliferation and differentiation potential were determined. The scaffolds fabricated here have appropriate surface properties, but with different mechanical strength and osteogenic proliferation and differentiation. Multi-layer scaffolds where the drug was in the middle layer and PLLA-plasma and PLLA–P123 with cover layer showed the best osteogenic proliferation and differentiation than the other groups of scaffolds. The drug release profiles of the scaffolds were completely different: single layer scaffolds showed burst release within the first day, while multilayer scaffolds showed controlled release. Therefore, the multilayer drug loaded scaffolds prepared have dual benefits can provide both better osteogenesis and controlled release of drugs and bioactive molecules at the implant site. © 2018, © 2018 Informa UK Limited, trading as Taylor & Francis Group.
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