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    A novel peptide hydrogel of metal ion clusters for accelerating bone defect regeneration

    Year: 2023

    Journal: Journal of Controlled Release, Volume 353, 2023-01-01

    Authors: Xu, Liu; Xu, Shan; Xiang, Tang Yong; Chen, Lin Wei; Zhong, Wei Xi; Zhu, Ling; Liu, Heng; Wu, Li; Li, Wei Dong; Wang, Yu Tong; Cai, Bao Chang; Yao, Jun Hong; Chen, Rui; Xin, Wen Feng; Cao, Gang; Chen, Zhi Peng

    Keywords: Bone regeneration; Hydrogels; Metal ion cluster chelation; Self-assembling peptide

    In the absence of adequate treatment, effective bone regeneration remains a great challenge. Exploring hydrogels with properties of excellent bioactivity, stability, non-immunogenicity, and commercialization is an important step to develop hydrogel-based bone regeneration materials. In this study, we engineered a self-assembled chelating peptide hydrogel loaded with an osteogenic metal ion cluster extracted from the processed pyritum decoction, including Fe2+, Cu2+, Zn2+, Mn2+, Mg2+, and Ca2+ ions, named processed pyritum hydrogel (PPH). We demonstrated that as a reservoir of beneficial metal ion clusters in bone regeneration, PPH has been shown to regulate a variety of genes in the process of bone regeneration. These genes are mainly involved in extracellular matrix synthesis, cell adhesion and migration, cytokine expression, antimicrobial and inflammation. Therefore, PPH accelerated the progress of various bone healing stages, and shortened the bone healing cycle by 4 weeks. Our investigation outcomes showed that the engineered metal ion cluster hydrogel is a novel, simple, and commercializable bone-regenerating hydrogel with potential clinical use.
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