Affiliation:
1. State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Biological Science and Medical Engineering Donghua University Shanghai 201620 China
2. Department of Radiology Shanghai Songjiang District Central Hospital Shanghai 201600 China
Abstract
AbstractIn situ monitoring of bone tissue regeneration progression is critical for the development of bone tissue engineering scaffold. However, engineered scaffolds that can stimulate osteogenic progress and allow for non‐invasive monitoring of in vivo bone regeneration simultaneously are rarely reported. Based on a hard‐and‐soft integration strategy, a multifunctional scaffold composed of 3D printed microfilaments and a hydrogel network containing simvastatin (SV), indocyanine green‐loaded superamphiphiles, and aminated ultrasmall superparamagnetic iron oxide nanoparticles (USPIO‐NH2) is fabricated. Both in vitro and in vivo results demonstrate that the as‐prepared scaffold significantly promotes osteogenesis through controlled SV release. The biocomposite scaffold exhibits alkaline phosphatase‐responsive near‐infrared II fluorescence imaging. Meanwhile, USPIO‐NH2 within the co‐crosslinked nanocomposite network enables the visualization of scaffold degradation by magnetic resonance imaging. Therefore, the biocomposite scaffold enables or facilitates non‐invasive in situ monitoring of neo‐bone formation and scaffold degradation processes following osteogenic stimulation, offering a promising strategy to develop theranostic scaffolds for tissue engineering.
Funder
National Natural Science Foundation of China
Fundamental Research Funds for the Central Universities
Science and Technology Commission of Shanghai Municipality
Subject
Pharmaceutical Science,Biomedical Engineering,Biomaterials