1. Dual-Peptide-Functionalized Nanofibrous Scaffolds Recruit Host Endothelial Progenitor Cells for Vasculogenesis to Repair Calvarial Defects
- Author
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Li Li, Lu Hongwei, Jiangming Luo, Shenfang Zha, Xinyun Han, Li Yang, Peixin Chen, Shuang Wan, Qingyi He, Qijie Dai, Zhengwei Yang, Pingping Ma, Junxian Hu, Yohanes Kristo Sugiarto Utomo, Yulan Zhao, Wanqian Liu, and Xiaorui Jiang
- Subjects
Male ,Artificial bone ,Bone Regeneration ,Materials science ,Nanofibers ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,Rats, Sprague-Dawley ,Vasculogenesis ,In vivo ,Cell Adhesion ,Animals ,Humans ,General Materials Science ,Progenitor cell ,Bone regeneration ,Cell Proliferation ,Endothelial Progenitor Cells ,Neovascularization, Pathologic ,Tissue Engineering ,Tissue Scaffolds ,Regeneration (biology) ,Skull ,021001 nanoscience & nanotechnology ,In vitro ,Rats ,0104 chemical sciences ,Cell biology ,Transplantation ,embryonic structures ,cardiovascular system ,Bone Diseases ,Peptides ,0210 nano-technology ,circulatory and respiratory physiology - Abstract
Vasculogenesis (de novo formation of vessels) induced by endothelial progenitor cells (EPCs) is requisite for vascularized bone regeneration. However, there exist few available options for promoting vasculogenesis within artificial bone grafts except for exogenous EPC transplantation, which suffers from the source of EPC, safety, cost, and time concerns in clinical applications. This study aimed at endogenous EPC recruitment for vascularized bone regeneration by using a bioinspired EPC-induced graft. The EPC-induced graft was created by immobilizing two bioactive peptides, WKYMVm and YIGSR, on the surface of poly(ε-caprolactone) (PCL)/poliglecaprone (PGC) nanofibrous scaffolds via a polyglycolic acid (PGA)-binding peptide sequence. Remarkable immobilization efficacy of WKYMVm and YIGSR peptides and their sustained release (over 14 days) from scaffolds were observed. In vivo and in vitro studies showed robust recruitment of EPCs, which subsequently contributed to early vasculogenesis and ultimate bone regeneration. The dual-peptide-functionalized nanofibrous scaffolds proposed in this study provide a promising therapeutic strategy for vasculogenesis in bone defect repair.
- Published
- 2019