声动力疗法
免疫系统
材料科学
获得性免疫系统
炎症
先天免疫系统
免疫
免疫学
医学
活性氧
微生物学
生物
细胞生物学
作者
Kun Xu,Yanan Zou,Chuanchuan Lin,Liangshuai Zhang,Meijun Tan,Meng Li,Jing Wu,Xuan Li,Ye He,Peng Liu,Ke Li,Kaiyong Cai
出处
期刊:Biomaterials
[Elsevier]
日期:2024-12-01
卷期号:311: 122649-122649
标识
DOI:10.1016/j.biomaterials.2024.122649
摘要
Innovative solutions are required for the intervention of implant associated infections (IAIs), especially for bone defect patients with chronic inflammatory diseases like diabetes mellitus (DM). The complex immune microenvironment of infections renders implants with direct antibacterial ability inadequate for the prolonged against of bacterial infections. Herein, a synergistic treatment strategy was presented that combined sonodynamic therapy (SDT) with adaptive immune modulation to treat IAIs in diabetes patients. A multifunctional coating was created on the surface of titanium (Ti) implants, consisting of manganese dioxide nanoflakes (MnO2 NFs) with cascade catalytic enzyme activity and a responsive degradable hydrogel containing a sonosensitizer. The reactive oxygen species (ROS) generated by glucose-hydrogen peroxide (H2O2) cascade catalysis and ultrasound (US) activation sonosensitizer helped kill bacteria and release bacterial antigens. Meanwhile, Mn2+ facilitated dendritic cells (DCs) maturation, enhancing antigen presentation to activate both cellular and humoral adaptive immunity against bacterial infections. This approach effectively eliminated bacteria in established diabetic IAIs model and activated systemic antibacterial immunity, providing long-term antibacterial protection. This study presents a non-antibiotic immunotherapeutic strategy for fighting IAIs in chronic diseases.
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