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Biomimetic Multilayered Gas-Foaming Scaffold with Sustained bFGF Delivery for Annulus Fibrosus Regeneration

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机构: [1]Shanghai Jiao Tong Univ, Tongren Hosp, Inst Med Robot, Shanghai Key Lab Flexible Med Robot, 1111 XianXia Rd, Shanghai 200336, Peoples R China [2]Shanghai Zhongqiao Vocat & Tech Univ, Inst Biomat & Biomed, Sch Food & Pharm, 3888 Caolong Rd, Shanghai 201514, Peoples R China [3]Shanghai Jiao Tong Univ, Tongren Hosp, Ctr Res Minimally Invas Spine Surg, Dept Orthopaed,Sch Med, 1111 XianXia Rd, Shanghai 200336, Peoples R China [4]Shanghai Jiao Tong Univ, Tongren Hosp, Hongqiao Int Inst Med, Sch Med, 1111 XianXia Rd, Shanghai 200336, Peoples R China
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关键词: annulus fibrosus electrospinning gas foaming intervertebral disc multilayered structure

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Current clinical treatments for intervertebral disc (IVD) herniation (e.g., discectomy) often lead to re-herniation, and tissue engineering scaffolds for annulus fibrosus (AF) regeneration remain scarce, particularly those capable of mimicking the multilayered structure of native AF. This study combines electrospinning with gas-foaming technology to fabricate a 3D nanofiber scaffold (3DS) with a hierarchical multilayered structure. Subsequently, fibronectin is employed as a "bridge" to immobilize basic fibroblast growth factor (bFGF) onto 3DS through its inherent gelatin and heparin binding domains, ultimately constructing a 3D bioactive AF scaffold (3DFF). In vitro experiments demonstrate that the 3DFF mimicks the multilayered structure of native AF. Through sustained bFGF release, it enhances extracellular signal-regulated kinase (ERK) phosphorylation and activates the Wnt/beta-catenin pathway, thereby promoting cell proliferation, migration, and matrix secretion. In vivo experiments using a rat tail AF defect model show that 3DFF mitigates IVD degeneration and facilitates AF regeneration. In summary, this study develops a bioactive biomimetic multilayered annulus fibrosus scaffold, offering a promising strategy for annulus fibrosus repair following discectomy.

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出版当年[2025]版:
大类 | 2 区 医学
小类 | 2 区 工程:生物医学 2 区 材料科学:生物材料 2 区 纳米科技
最新[2025]版:
大类 | 2 区 医学
小类 | 2 区 工程:生物医学 2 区 材料科学:生物材料 2 区 纳米科技
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出版当年[2023]版:
Q1 ENGINEERING, BIOMEDICAL Q1 MATERIALS SCIENCE, BIOMATERIALS Q1 NANOSCIENCE & NANOTECHNOLOGY
最新[2024]版:
Q1 ENGINEERING, BIOMEDICAL Q1 MATERIALS SCIENCE, BIOMATERIALS Q1 NANOSCIENCE & NANOTECHNOLOGY

影响因子: 最新[2024版] 最新五年平均 出版当年[2023版] 出版当年五年平均 出版前一年[2022版] 出版后一年[2024版]

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第一作者机构: [1]Shanghai Jiao Tong Univ, Tongren Hosp, Inst Med Robot, Shanghai Key Lab Flexible Med Robot, 1111 XianXia Rd, Shanghai 200336, Peoples R China [3]Shanghai Jiao Tong Univ, Tongren Hosp, Ctr Res Minimally Invas Spine Surg, Dept Orthopaed,Sch Med, 1111 XianXia Rd, Shanghai 200336, Peoples R China
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通讯机构: [1]Shanghai Jiao Tong Univ, Tongren Hosp, Inst Med Robot, Shanghai Key Lab Flexible Med Robot, 1111 XianXia Rd, Shanghai 200336, Peoples R China [3]Shanghai Jiao Tong Univ, Tongren Hosp, Ctr Res Minimally Invas Spine Surg, Dept Orthopaed,Sch Med, 1111 XianXia Rd, Shanghai 200336, Peoples R China
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