AccScience Publishing / IJB / Volume 9 / Issue 6 / DOI: 10.36922/ijb.1071
RESEARCH ARTICLE

Melt electrospinning writing PCL scaffolds after alkaline modification with outstanding cytocompatibility and osteoinduction

Yubo Shi1 Lei Wang1 Liguo Sun2 Zhennan Qiu3,4 Xiaoli Qu3,4 Jingyi Dang1 Zhao Zhang1 Jiankang He3,4* Hongbin Fan1*
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1 Department of Orthopedic Surgery, Xijing Hospital, The Fourth Military Medical University, Xi’an, China
2 Department of Medical Management, Shaanxi Provincial Hospital of Chinese Medicine, Xi’an, China
3 State Key Laboratory for Manufacturing Systems Engineering, Xi’an Jiaotong University, Xi’an, China
4 Rapid Manufacturing Research Center of Shaanxi Province, Xi’an Jiaotong University, Xi’an, China
Submitted: 12 June 2023 | Accepted: 13 July 2023 | Published: 11 August 2023
© 2023 by the Author(s). This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution 4.0 International License ( https://creativecommons.org/licenses/by/4.0/ )
Abstract

Melt electrospinning writing (MEW) is a promising three-dimensional (3D) printing technology that enables the creation of scaffolds with highly ordered microfibers. Polycaprolactone (PCL) is an ideal material for MEW scaffold fabrication due to its exceptional printability. However, its low cellular affinity can hinder its performance in bone tissue engineering. This study aimed to explore the potential of NaOH treatment as a means of enhancing the cytocompatibility and osteoinductive properties of PCL scaffolds. After modification with a NaOH solution, the physiochemical properties of the MEW PCL scaffold were analyzed. The surface of the scaffold was found to have nanopits and nanogrooves, which differed from the smooth surface of the PCL scaffold. Atomic force microscopy and automatic water contact angle assays revealed an increase in surface roughness and wettability, both of which were found to be beneficial for cell proliferation and adhesion. In vitro experiments demonstrated that the NaOH-treated surface was able to induce osteogenic differentiation of rat bone marrow mesenchymal stem cells (BMSCs) via the integrinα2/β1-PI3K-Akt signaling pathway, which had not been previously observed. The study involved implanting PCL scaffold to repair a cranial defect. After 1 and 3 months of implantation, histological analysis and micro-computed tomography scans showed a higher amount of newly formed bone on the NaOH-treated PCL scaffolds compared to the PCL scaffold. The study concluded that NaOH treatment was a simple and effective way to enhance cellular affinity and osteoinductive property of MEW PCL scaffold. This strategy may provide a cost-efficient method for promoting bone regeneration.

Keywords
Melt electrospinning writing
Polycaprolactone
Bone regeneration
Tissue engineering
Funding
This work was supported by National Natural Science Foundation of China (No. 31971272) and International Science and Technology Cooperation Keg Program project of Shaanxi Province (No. 2023-GHZD-25).
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Conflict of interest
The authors declare no conflicts of interests.
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing