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Bioinspired Mild Photothermal Effect-Reinforced Multifunctional Fiber Scaffolds Promote Bone Regeneration

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机构: [1]Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing Lab Biomed Mat, Beijing 100029, Peoples R China [2]Harvard Med Sch, Brigham & Womens Hosp, Ctr Nanomed, Boston, MA 02115 USA [3]Brigham & Womens Hosp, Harvard Med Sch, Dept Anesthesiol, Boston, MA 02115 USA [4]Peking Univ, Peking Univ Hosp 3, Dept Sports Med, Beijing Key Lab Sports Injuries,Inst Sports Med, Beijing 100191, Peoples R China [5]Capital Med Univ, Beijing Tongren Hosp, Ctr Foot & Ankle Surg, Beijing 100730, Peoples R China
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关键词: black phosphorus mild photothermal therapy endogenous cells recruitment nanofiber scaffold bone regeneration trauma fractures bone tumors osteoporosis skeletal malfor

摘要:
Bone fractures are often companied with poor bone healing and high rates of infection. Early recruitment of mesenchymal stem cells (MSCs) is critical for initiating efficient bone repair, and mild thermal stimulation can accelerate the recovery of chronic diseases. Here, a bioinspired, staged photothermal effect-reinforced multifunctional scaffold was fabricated for bone repair. Uniaxially aligned electrospun polycaprolactone nanofibers were doped with black phosphorus nanosheets (BP NSs) to endow the scaffold with excellent near-infrared (NIR) responsive capability. Apt19S was then decorated on the surface of the scaffold to selectively recruit MSCs toward the injured site. Afterward, microparticles of phase change materials loaded with antibacterial drugs were also deposited on the surface of the scaffold, which could undergo a solid-to-liquid phase transition above 39 degrees C, triggering the release of payload to eliminate bacteria and prevent infection. Under NIR irradiation, photothermal-mediated up-regulation of heat shock proteins and accelerated biodegradation of BP NSs could promote the osteogenic differentiation of MSCs and biomineralization. Overall, this strategy shows the ability of bacteria elimination, MSCs recruitment, and bone regeneration promotion with the assistance of photothermal effect in vitro and in vivo, which emphasizes the design of a bioinspired scaffold and its potential for a mild photothermal effect in bone tissue engineering.

基金:

基金编号: 2420 BPA075 113548 2022A002721 018129 52073014 52221006 82002049 buctrc202020 Z200025 oic-202201004 2022-4-20511 2021-YJJ-ZZL-008

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出版当年[2022]版:
大类 | 1 区 材料科学
小类 | 1 区 纳米科技 1 区 化学:综合 1 区 材料科学:综合 1 区 物理化学
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
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出版当年[2021]版:
Q1 CHEMISTRY, MULTIDISCIPLINARY Q1 CHEMISTRY, PHYSICAL Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Q1 NANOSCIENCE & NANOTECHNOLOGY
最新[2023]版:
Q1 CHEMISTRY, MULTIDISCIPLINARY Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Q1 NANOSCIENCE & NANOTECHNOLOGY Q1 CHEMISTRY, PHYSICAL

影响因子: 最新[2023版] 最新五年平均 出版当年[2021版] 出版当年五年平均 出版前一年[2020版] 出版后一年[2022版]

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第一作者机构: [1]Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing Lab Biomed Mat, Beijing 100029, Peoples R China [2]Harvard Med Sch, Brigham & Womens Hosp, Ctr Nanomed, Boston, MA 02115 USA [3]Brigham & Womens Hosp, Harvard Med Sch, Dept Anesthesiol, Boston, MA 02115 USA
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通讯机构: [2]Harvard Med Sch, Brigham & Womens Hosp, Ctr Nanomed, Boston, MA 02115 USA [3]Brigham & Womens Hosp, Harvard Med Sch, Dept Anesthesiol, Boston, MA 02115 USA
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