AccScience Publishing / IJB / Online First / DOI: 10.36922/IJB025290296
RESEARCH ARTICLE
Early Access

PAS-Na-encapsulated liposome 3D-printed aerogel scaffolds for intelligent drug delivery system

Kefeng Wang1† Yutong Chen1,2† Yan Xu1* Subramanian Sundarrajan2 Zhitao Yin1 Jingtao Hu1 Jian Chao1 Shun Zhang1 Miaomiao Zheng1 Seeram Ramakrishna2*
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1 College of Mechanical Engineering, Xinjiang University, Urumqi, Xinjiang, China
2 Department of Mechanical Engineering, College of Design and Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore
†These authors contributed equally to this work.
Received: 18 July 2025 | Accepted: 3 September 2025 | Published online: 9 September 2025
© 2025 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

Uncontrollable local drug release from drug-loaded scaffolds is a critical challenge in treating bone tuberculosis (BTB), which often leads to bacterial resistance and treatment failure. This study proposes an intelligent composite aerogel scaffold that integrates external stimulus response, sustained-release, and structural design. Using direct ink writing (DIW) and freeze-drying, liposome-encapsulated sodium para-aminosalicylate acid (PAS-Na@Lipo) and superparamagnetic iron oxide nanoparticles (SPIONs) modified with silk fibroin peptides (SF) were co-integrated into a hydroxyapatite scaffold, and thereby precisely constructed an aerogel scaffold (PAS-Na@Lipo/SPIONs/CNFs/n-HA/PVA) that combines extracellular matrix-like structure with controlled-release responsiveness. The incorporation of liposomes not only suppresses drug burst release significantly but also extends the effective drug release period to 336 hours. Furthermore, under remote, non-invasive triggering by an external alternating magnetic field (AMF), the local temperature of the scaffold can be maintained stable at 42 °C. This enables an accelerated, on-demand release of the drug, overcoming the limitations of uncontrolled delivery. By combining precise 3D printing, liposome-based sustained release, and dynamic magnetic regulation, the intelligent scaffold offers a promising new strategy for personalized treatment of bone tuberculosis.

Keywords
Keywords: Bone tuberculosis
3D printing
Liposome
Aerogel
Magnetic thermal response
Drug release
Funding
This work was supported by the National Natural Science Foundation of China (52365053). Excellent Doctoral Graduate Innovation Project of Xinjiang University, China (XJU2024BS101). Also, this work was supported by China Scholarship Council.
Conflict of interest
The authors declare they have no competing interests.
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International Journal of Bioprinting, Electronic ISSN: 2424-8002 Print ISSN: 2424-7723, Published by AccScience Publishing