Related Experiment Video
Updated: May 12, 2026

Implantation of Electrospun Vascular Grafts with Optimized Structure in a Rat Model
Published on: June 27, 2018
EGCG-Modified Bioactive Core-Shell Fibers Modulate Oxidative Stress to Synergistically Promote Vascularized Bone
Li Yuan1, Jiangshan Liu1, Shiqi Xiao2
1Research Center for Nano-Biomaterials, Analytical and Testing Center, Sichuan University, Chengdu 610064, PR China.
Abstract:
Oxidative stress induced by reactive oxygen species (ROS) can adversely affect tissue repair, whereas endowing biomaterials with antioxidant activity can improve the in vivo microenvironment, thereby promoting angiogenesis and osteogenesis. Accordingly, this study utilized epigallocatechin-3-gallate (EGCG), a material known for its reducing properties, oxidative self-polymerization capability, and strong binding characteristics, to modify a bioactive core-shell fibrous membrane (10RP-PG). Compared to the 10RP-PG fibrous membrane, the EGCG-modified fibrous membrane (E/10RP-PG) exhibited superior hydrophilicity, excellent cell adhesion, and compatibility. Moreover, the EGCG-modified fibrous membrane can effectively scavenge free radicals, ameliorate the local microenvironment, and foster angiogenesis (enhancing the expression of angiogenic genes in human umbilical vein endothelial cells (HUVECs) by 1.58 times and promoting vascular generation area upon subcutaneous implantation by 4.47 times). The enhancement of angiogenic activity of the E/10RP-PG fibrous membrane further promoted cartilage degeneration and absorption, as well as new bone formation, thus facilitating the repair of bone defects. This study provides a new strategy for promoting bone defect repair through the surface modification of biomaterials with an antioxidant agent, and the fabricated E/10RP-PG fibrous membranes show promise for guiding vascularized bone regeneration.
Related Concept Videos
Bone Remodeling
Regulation of Angiogenesis and Blood Supply
Osteoclasts in Bone Remodeling
Tissue Renewal without Stem Cells
However, failure of such a system...
Fractures: Bone Repair
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Bone Remodeling and Repair

