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Precise Cell Type Electrical Stimulation Therapy Via Force-electric Hydrogel Microspheres for Cartilage Healing

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机构: [1]Capital Med Univ, Beijing Tongren Hosp, Dept Foot & Ankle Surg, Beijing 100730, Peoples R China [2]Shanghai Jiao Tong Univ, Ruijin Hosp, Shanghai Inst Traumatol & Orthoped, Sch Med,Dept Orthopaed Shanghai,Key Lab Prevent &, Shanghai 200025, Peoples R China
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关键词: cartilage tissue engineering chondrocyte differentiation electrical stimulation MAPK pathway piezoelectric nanoparticles

摘要:
Electrical stimulation enhances cellular activity, promoting tissue regeneration and repair. However, specific cells and maintaining a stable energy supply are challenges for precise cell electrical stimulation therapy. Here, force-electric conversion hydrogel microspheres (Piezo@CR MPs) is devloped to induce specific stem cell aggregation and promote chondrogenic differentiation through localized electrical stimulation. These MPs contain barium titanate (BT) nanoparticles embedded in hyaluronic acid methacrylate hydrogel MPs, with a polydopamine (pDA) coating bound to stem cell recruitment peptides (CR) via pi-pi conjugation and electrostatic forces. Piezo@CR MPs convert pressure (ultrasound) into electrical stimulation, directing BMSCs for colonization and chondrogenesis. In vitro, directionally migrated stem cells almost covered the Piezo@CR MP surface, generating up to 451 mV of electrical output that enhanced chondrogenic differentiation. In a rabbit osteochondral defect model, Piezo@CR MPs promoted cartilage regeneration, nearly resembling native cartilage. In a rat osteoarthritis model, they reduced cartilage degeneration and improved behavioral outcomes. Additionally, Piezo@CR MPs promoted cartilage regeneration by driving the influx of extracellular calcium and activating the p38 mitogen-activated protein kinase (MAPK) pathway. In conclusion, Piezo@CR MPs offer a new approach for precise cell type electrical stimulation therapy in treating of cartilage injuries and degeneration.

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出版当年[2023]版:
大类 | 1 区 材料科学
小类 | 1 区 化学:综合 1 区 物理化学 1 区 材料科学:综合 1 区 纳米科技 1 区 物理:应用 1 区 物理:凝聚态物理
最新[2023]版:
大类 | 1 区 材料科学
小类 | 1 区 化学:综合 1 区 物理化学 1 区 材料科学:综合 1 区 纳米科技 1 区 物理:应用 1 区 物理:凝聚态物理
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出版当年[2022]版:
Q1 CHEMISTRY, MULTIDISCIPLINARY Q1 CHEMISTRY, PHYSICAL Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Q1 NANOSCIENCE & NANOTECHNOLOGY Q1 PHYSICS, APPLIED Q1 PHYSICS, CONDENSED MATTER
最新[2023]版:
Q1 CHEMISTRY, MULTIDISCIPLINARY Q1 CHEMISTRY, PHYSICAL Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Q1 NANOSCIENCE & NANOTECHNOLOGY Q1 PHYSICS, APPLIED Q1 PHYSICS, CONDENSED MATTER

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第一作者机构: [1]Capital Med Univ, Beijing Tongren Hosp, Dept Foot & Ankle Surg, Beijing 100730, Peoples R China [2]Shanghai Jiao Tong Univ, Ruijin Hosp, Shanghai Inst Traumatol & Orthoped, Sch Med,Dept Orthopaed Shanghai,Key Lab Prevent &, Shanghai 200025, Peoples R China
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