Synergistic regulation of osteoimmune microenvironment by IL-4 and RGD to accelerate osteogenesis

No Thumbnail Available
File version
Author(s)
Li, Mengting
Wei, Fei
Yin, Xueqiong
Xiao, Lan
Yang, Lan
Su, Jiehua
Weng, Jie
Feng, Bo
Xiao, Yin
Zhou, Yinghong
Griffith University Author(s)
Primary Supervisor
Other Supervisors
Editor(s)
Date
2020
Size
File type(s)
Location
License
Abstract

The control of early inflammatory reactions and recruitment of progenitor cells are critical for subsequent tissue repair and regeneration after biomaterial implantation. The aim of this study was to design a multi-functional biomaterial with a controlled drug delivery system to create an optimal local environment for early osteogenesis. Here, the anti-inflammatory cytokine IL-4 and pro-osteogenic RGD peptide were assembled layer-by-layer on TiO2 nanotubes. A poly(dopamine) (DOP) coating was employed onto TiO2 nanotubes (T/DOP) to functionalized with IL-4 (T/DOP-IL4). Then, a carboxymethyl chitosan hydrogel layer (CG) was generated on T/DOP-IL4 to control IL-4 release and RGD peptide immobilization. Cell co-culture models were applied to study macrophage polarization on various material surfaces and the regulation of mesenchymal stromal cell (MSC) osteogenic differentiation. Our data suggest that T/DOP-IL4/CG-RGD surfaces developed in this study are multi-functional, and can not only drive phenotypic changes in macrophages (switching to anti-inflammatory M2 phenotype), resulting in the production of reparative cytokines such as IL-10, but also enhance MSC differentiation related to the activation of BMP/SMAD/RUNX2 signaling. This study further confirmed that the introduction of anti-inflammatory cytokine (IL-4) and cell adhesive motif (RGD) onto Ti substrate can work synergistically to generate a more favorable early-stage osteo-immune environment with superior osteogenic properties, thus representing a potential ideal surface for the generation of bone biomaterials.

Journal Title

Materials Science and Engineering: C

Conference Title
Book Title
Edition
Volume

109

Issue
Thesis Type
Degree Program
School
Publisher link
Patent number
Funder(s)
Grant identifier(s)
Rights Statement
Rights Statement
Item Access Status
Note
Access the data
Related item(s)
Subject

Biomedical engineering

Materials engineering

Science & Technology

Materials Science, Biomaterials

TiO2 nanotubes

Persistent link to this record
Citation

Li, M; Wei, F; Yin, X; Xiao, L; Yang, L; Su, J; Weng, J; Feng, B; Xiao, Y; Zhou, Y, Synergistic regulation of osteoimmune microenvironment by IL-4 and RGD to accelerate osteogenesis, Materials Science and Engineering: C, 2020, 109, pp. 110508

Collections