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Lei X, Yang B, Chen J, Yang F, Tang J, Li J, Zhao Q, Zhang J, Li J, Li Y, Zuo Y. Biodegradable Polyurethane Scaffolds in Regeneration Therapy: Characterization and In Vivo Real-Time Degradation Monitoring by Grafted Fluorescent Tracer. ACS APPLIED MATERIALS & INTERFACES 2024; 16:111-126. [PMID: 38112686 DOI: 10.1021/acsami.3c13187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2023]
Abstract
There is an urgent need to assess material degradation in situ and in real time for their promising application in regeneration therapy. However, traditional monitoring methods in vitro cannot always profile the complicated behavior in vivo. This study designed and synthesized a new biodegradable polyurethane (PU-P) scaffold with polycaprolactone glycol, isophorone diisocyanate, and l-lysine ethyl ester dihydrochloride. To monitor the degradation process of PU-P, calcein was introduced into the backbone (PU-5) as a chromophore tracing in different sites of the body and undegradable fluorescent scaffold (CPU-5) as the control group. Both PU-P and PU-5 can be enzymatically degraded, and the degradation products are molecularly small and biosafe. Meanwhile, by virtue of calcein anchoring with urethane, polymer chains of PU-5 have maintained the conformational stability and extended the system conjugation, raising a structure-induced emission effect that successfully achieved a significant enhancement in the fluorescence intensity better than pristine calcein. Evidently, unlike the weak fluorescent response of CPU-5, PU-5 and its degradation can be clearly imaged and monitored in real time after implantation in the subcutaneous tissue of nude mice. Meanwhile, the in situ osteogeneration has also been promoted after the two degradable scaffolds have been implanted in the rabbit femoral condyles and degraded with time. To sum up, the strategy of underpinning tracers into degradable polymer chains provides a possible and effective way for real-time monitoring of the degradation process of implants in vivo.
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Affiliation(s)
- Xiaoyu Lei
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Boyuan Yang
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jie Chen
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Fang Yang
- Radboud Institute for Molecular Life Sciences, Department of Dentistry-Biomaterials, Radboud University Medical Center, Philips van Leydenlaan 25, Nijmegen 6525EX, The Netherlands
| | - Jiajing Tang
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jihua Li
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu 610041, People's Republic of China
| | - Qing Zhao
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jinzheng Zhang
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Jidong Li
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yubao Li
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
| | - Yi Zuo
- Research Center for Nano Biomaterials, Analytical & Testing Center, Sichuan University, Chengdu 610064, People's Republic of China
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Feng Q, Zhou X, He C. NIR light-facilitated bone tissue engineering. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2024; 16:e1925. [PMID: 37632228 DOI: 10.1002/wnan.1925] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2023] [Revised: 08/03/2023] [Accepted: 08/05/2023] [Indexed: 08/27/2023]
Abstract
In the last decades, near-infrared (NIR) light has attracted considerable attention due to its unique properties and numerous potential applications in bioimaging and disease treatment. Bone tissue engineering for bone regeneration with the help of biomaterials is currently an effective means of treating bone defects. As a controlled light source with deeper tissue penetration, NIR light can provide real-time feedback of key information on bone regeneration in vivo utilizing fluorescence imaging and be used for bone disease treatment. This review provides a comprehensive overview of NIR light-facilitated bone tissue engineering, from the introduction of NIR probes as well as NIR light-responsive materials, and the visualization of bone regeneration to the treatment of bone-related diseases. Furthermore, the existing challenges and future development directions of NIR light-based bone tissue engineering are also discussed. This article is categorized under: Diagnostic Tools > In Vivo Nanodiagnostics and Imaging Implantable Materials and Surgical Technologies > Nanotechnology in Tissue Repair and Replacement.
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Affiliation(s)
- Qian Feng
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
| | - Xiaojun Zhou
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
| | - Chuanglong He
- State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Biological Science and Medical Engineering, Donghua University, Shanghai, China
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Wang P, Wu J, Yang H, Liu H, Yao T, Liu C, Gong Y, Wang M, Ji G, Huang P, Wang X. Intelligent microneedle patch with prolonged local release of hydrogen and magnesium ions for diabetic wound healing. Bioact Mater 2023; 24:463-476. [PMID: 36685806 PMCID: PMC9841127 DOI: 10.1016/j.bioactmat.2023.01.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 12/04/2022] [Accepted: 01/02/2023] [Indexed: 01/09/2023] Open
Abstract
Diabetes mellitus, an epidemic with a rapidly increasing number of patients, always leads to delayed wound healing associated with consistent pro-inflammatory M1 polarization, decreased angiogenesis and increased reactive oxygen species (ROS) in the microenvironment. Herein, a poly (lactic-co-glycolic acid) (PLGA)-based microneedle patch loaded with magnesium hydride (MgH2) (MN-MgH2) is manufactured for defeating diabetic wounds. The application of microneedle patch contributes to the transdermal delivery and the prolonged release of MgH2 that can generate hydrogen (H2) and magnesium ions (Mg2+) after reaction with body fluids. The released H2 reduces the production of ROS, transforming the pathological microenvironment induced by diabetes mellitus. Meanwhile, the released Mg2+ promotes the polarization of pro-healing M2 macrophages. Consequently, cell proliferation and migration are improved, and angiogenesis and tissue regeneration are enhanced. Such intelligent microneedle patch provides a novel way for accelerating wound healing through steadily preserving and releasing of H2 and Mg2+ locally and sustainably.
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Affiliation(s)
- Pei Wang
- Department of Thoracic Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Jiayingzi Wu
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen, 518060, China
| | - Haiyan Yang
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Hengke Liu
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen, 518060, China
| | - Tianyu Yao
- Center of Hydrogen Science, Shanghai Jiao Tong University, Shanghai, 200240, China
| | - Chang Liu
- Department of Thoracic Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Yan Gong
- Department of Thoracic Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Mingsong Wang
- Department of Thoracic Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Guangyu Ji
- Department of Thoracic Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China
| | - Peng Huang
- Marshall Laboratory of Biomedical Engineering, International Cancer Center, Laboratory of Evolutionary Theranostics (LET), School of Biomedical Engineering, Shenzhen University Medical School, Shenzhen, 518060, China,Corresponding author.
| | - Xiansong Wang
- Department of Thoracic Surgery, Shanghai Key Laboratory of Tissue Engineering, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China,Corresponding author.
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Wang P, Wang X. Mimicking the native bone regenerative microenvironment for in situ repair of large physiological and pathological bone defects. ENGINEERED REGENERATION 2022. [DOI: 10.1016/j.engreg.2022.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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Li L, Gil CJ, Finamore TA, Evans CJ, Tomov ML, Ning L, Theus A, Kabboul G, Serpooshan V, Roeder RK. Methacrylate‐Modified Gold Nanoparticles Enable Noninvasive Monitoring of Photocrosslinked Hydrogel Scaffolds. ADVANCED NANOBIOMED RESEARCH 2022; 2. [DOI: 10.1002/anbr.202200022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Affiliation(s)
- Lan Li
- Department of Aerospace and Mechanical Engineering Bioengineering Graduate Program University of Notre Dame Notre Dame IN 46556 USA
- Notre Dame Center for Nanoscience and Technology (NDnano) Materials Science and Engineering Graduate Program University of Notre Dame Notre Dame IN 46556 USA
| | - Carmen J. Gil
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Tyler A. Finamore
- Department of Aerospace and Mechanical Engineering Bioengineering Graduate Program University of Notre Dame Notre Dame IN 46556 USA
| | - Connor J. Evans
- Department of Aerospace and Mechanical Engineering Bioengineering Graduate Program University of Notre Dame Notre Dame IN 46556 USA
| | - Martin L. Tomov
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Liqun Ning
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Andrea Theus
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Gabriella Kabboul
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
| | - Vahid Serpooshan
- Wallace H. Coulter Department of Biomedical Engineering Georgia Institute of Technology Atlanta GA 30332 USA
- Department of Pediatrics Emory University School of Medicine Emory University Atlanta GA 30322 USA
| | - Ryan K. Roeder
- Department of Aerospace and Mechanical Engineering Bioengineering Graduate Program University of Notre Dame Notre Dame IN 46556 USA
- Notre Dame Center for Nanoscience and Technology (NDnano) Materials Science and Engineering Graduate Program University of Notre Dame Notre Dame IN 46556 USA
- Department of Aerospace and Mechanical Engineering Bioengineering Graduate Program University of Notre Dame 148 Multidisciplinary Research Building Notre Dame IN 46556 USA
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Tian Y, Wei M, Wang L, Hong Y, Luo D, Sha Y. Two-Photon Time-Gated In Vivo Imaging of Dihydrolipoic-Acid-Decorated Gold Nanoclusters. MATERIALS (BASEL, SWITZERLAND) 2021; 14:7744. [PMID: 34947339 PMCID: PMC8706569 DOI: 10.3390/ma14247744] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/10/2021] [Accepted: 12/13/2021] [Indexed: 11/16/2022]
Abstract
Due to the unique advantages of two-photon technology and time-resolved imaging technology in the biomedical field, attention has been paid to them. Gold clusters possess excellent physicochemical properties and low biotoxicity, which make them greatly advantageous in biological imaging, especially for in vivo animal imaging. A gold nanocluster was coupled with dihydrolipoic acid to obtain a functionalized nanoprobe; the material displayed significant features, including a large two-photon absorption cross-section (up to 1.59 × 105 GM) and prolonged fluorescence lifetime (>300 ns). The two-photon and time-resolution techniques were used to perform cell imaging and in vivo imaging.
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Affiliation(s)
- Ye Tian
- Department of Biophysics, Single-Molecule and Nanobiology Laboratory, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (M.W.); (L.W.)
| | - Ming Wei
- Department of Biophysics, Single-Molecule and Nanobiology Laboratory, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (M.W.); (L.W.)
| | - Lijun Wang
- Department of Biophysics, Single-Molecule and Nanobiology Laboratory, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (M.W.); (L.W.)
| | - Yuankai Hong
- Department of Biophysics, Single-Molecule and Nanobiology Laboratory, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (M.W.); (L.W.)
| | - Dan Luo
- CAS Center for Excellence in Nanoscience, Beijing Key Laboratory of Micro-Nano Energy and Sensor, Beijing Institute of Nanoenergy and Nanosystems, Chinese Academy of Sciences, Beijing 100083, China
| | - Yinlin Sha
- Department of Biophysics, Single-Molecule and Nanobiology Laboratory, School of Basic Medical Sciences, Peking University, Beijing 100191, China; (M.W.); (L.W.)
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Cao G, He W, Fan Y, Li X. Exploring the match between the degradation of the ECM-based composites and tissue remodeling in a full-thickness abdominal wall defect model. Biomater Sci 2021; 9:7895-7910. [PMID: 34693955 DOI: 10.1039/d1bm01096d] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The repair of abdominal wall defects is currently a clinical challenge. A naturally derived extracellular matrix (ECM) such as small intestine submucosa (SIS) has received great attention in abdominal wall defect repair because of its remarkable bioactivity, biodegradability and tissue regeneration. The match between material degradation and tissue remodeling is very important for the realization of ideal repair effectiveness. In this study, a near-infrared (NIR) fluorescent dye Cy5.5 NHS ester was used to label ECM-based (ECMB) composites consisting of SIS and chitosan/elastin electrospun nanofibers for monitoring material degradation. The tissue remodeling in the ECMB composites for a full-thickness abdominal wall defect repair was systematically investigated by a series of tests including wall thickness measurement, muscle regeneration analysis and angiogenesis assessment. The main findings were: (1) real-time and noninvasive degradation monitoring of the ECMB composites until complete degradation could be realized by chemical conjugation with a Cy5.5 NHS ester. (2) In a full-thickness abdominal wall defect model, the explant thickness could be used as an intuitional indicator for evaluating the tissue remodeling efficiency in the ECMB composites, and the accuracy of this indicator was verified by various examinations including collagen deposition, angiogenesis, and muscle regeneration. The present study could provide new insight into evaluating tissue repair effectiveness of the ECMB composites.
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Affiliation(s)
- Guangxiu Cao
- Key Laboratory for Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Wei He
- Key Laboratory for Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Yubo Fan
- Key Laboratory for Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
| | - Xiaoming Li
- Key Laboratory for Biomechanics and Mechanobiology (Beihang University), Ministry of Education, Beijing Advanced Innovation Center for Biomedical Engineering, School of Biological Science and Medical Engineering, Beihang University, Beijing 100083, China.
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Zhao J, Zhang L, Qi Y, Liao K, Wang Z, Wen M, Zhou D. NIR Laser Responsive Nanoparticles for Ovarian Cancer Targeted Combination Therapy with Dual-Modal Imaging Guidance. Int J Nanomedicine 2021; 16:4351-4369. [PMID: 34234430 PMCID: PMC8254569 DOI: 10.2147/ijn.s299376] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Accepted: 06/01/2021] [Indexed: 01/04/2023] Open
Abstract
Purpose Multifunctional nanoparticles with targeted therapeutic function and diagnostic-imaging are of great interest in the domain of precision therapy. NIR laser responsive nanoparticles (PLGA-PEG-FA encapsulating Bi2S3, PFP, and Dox (designed as FBPD NPs)) are synthesized for ovarian cancer targeted combination therapy with CT/PA dual-modal imaging guidance (PA: photoacoustic; CT: X-ray computed tomography). Methods and Results The FBPD NPS prepared by the double emulsification method revealed excellent dispersity, great stability, outstanding optical properties. The temperature of FBPD NPs increased rapidly after laser irradiation, inducing liquid-to-gas conversion of perfluoropentane (PFP), and promoting the release of Dox up to 86.7%. These FBPD NPs demonstrated their outstanding imaging capability for both PA and CT imaging both in vitro and in vivo, providing the potential for therapeutic guidance and monitoring. Assisted by folic acid, these nanoparticles could highly enrich in ovarian tumor tissue and the accumulation peaked at 3 h after intravenous administration. The desirable photothermal-conversion efficiency of the nanoparticles combined with chemotherapy achieved highly efficient therapy, which was demonstrated both in vitro and in vivo. Conclusion We successfully constructed multifunctional theranostic FBPD NPs for highly efficient PTT/chemotherapy combined therapy with dual CT/PA imaging guidance/monitoring. The unique nanoparticles with multiple abilities pave an emerging way toward precise treatment of ovarian cancer.
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Affiliation(s)
- Jiawen Zhao
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Liang Zhang
- Department of Ultrasound, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Yingjie Qi
- Department of Intensive Care Unit (ICU), Dianjiang People's Hospital of Chongqing, Chongqing, People's Republic of China
| | - Kui Liao
- Department of Oncology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Zhigang Wang
- Institute of Ultrasound Imaging, The Second Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Ming Wen
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
| | - Di Zhou
- Department of Radiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing, People's Republic of China
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Fluorescent Labeling of Hyaluronic Acid-Chitosan Nanocarriers by Protein-Stabilized Gold Nanoclusters. CRYSTALS 2020. [DOI: 10.3390/cryst10121113] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
In medical research the visualization of drug carrier accumulation and release of the loaded drugs in vivo is an important field. In this work, two protein-stabilized gold nanoclusters (Au NCs) as effective fluorescent reporters (FRs) were investigated for labeling of biocompatible chitosan-modified hyaluronic acid based nanocarriers having two different structures. The colloid stability of the labeled carriers was studied by dynamic light scattering and Zeta potential measurements, while the changes in the fluorescence of the lysozyme- (LYZ) and bovine serum albumin (BSA)-stabilized Au NCs were analyzed by spectrofluorimetry and confocal fluorescent microscopy. We found that the labeling was effective with a wide range of marker:carrier mass ratios, and the fluorescence of the NCs and the colloid stability of the complexes were retained. Labeling during preparation and subsequent labeling were compared, and based on composition (nanocluster:carrier mass ratio) and structure of the complex systems we preferred the latter method, as it left the Au NCs free for further modifications. Considering both marker:carrier mass ratios and emission intensities, the LYZ-stabilized Au NCs proved to be better labels. The core-shell type carrier formulations showed increased fluorescence with LYZ-stabilized NCs, presumably from aggregation induced emission.
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Liu Q, Feng L, Chen Z, Lan Y, Liu Y, Li D, Yan C, Xu Y. Ultrasmall Superparamagnetic Iron Oxide Labeled Silk Fibroin/Hydroxyapatite Multifunctional Scaffold Loaded With Bone Marrow-Derived Mesenchymal Stem Cells for Bone Regeneration. Front Bioeng Biotechnol 2020; 8:697. [PMID: 32695767 PMCID: PMC7338306 DOI: 10.3389/fbioe.2020.00697] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 06/03/2020] [Indexed: 12/14/2022] Open
Abstract
Numerous tissue-engineered constructs have been investigated as bone scaffolds in regenerative medicine. However, it remains challenging to non-invasively monitor the biodegradation and remodeling of bone grafts after implantation. Herein, silk fibroin/hydroxyapatite scaffolds incorporated with ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles were successfully synthesized, characterized, and implanted subcutaneously into the back of nude mice. The USPIO labeled scaffolds showed good three-dimensional porous structures and mechanical property, thermal stability for bone repair. After loaded with bone marrow-derived mesenchymal stem cells (BMSCs), the multifunctional scaffolds promoted cell adhesion and growth, and facilitated osteogenesis by showing increased levels of alkaline phosphatase activity and up-regulation of osteoblastic genes. Furthermore, in vivo quantitative magnetic resonance imaging (MRI) results provided valuable information on scaffolds degradation and bone formation simultaneously, which was further confirmed by computed tomography and histological examination. These findings demonstrated that the incorporation of USPIO into BMSCs-loaded multifunctional scaffold system could be feasible to noninvasively monitor bone regeneration by quantitative MRI. This tissue engineering strategy provides a promising tool for translational application of bone defect repair in clinical scenarios.
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Affiliation(s)
- Qin Liu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Longbao Feng
- Key Laboratory of Biomaterials of Guangdong Higher Education Institutes, Guangdong Provincial Engineering and Technological Research Center for Drug Carrier Development, Department of Biomedical Engineering, Jinan University, Guangzhou, China
| | - Zelong Chen
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yong Lan
- Guangzhou Beogene Biotech Co., Ltd., Guangzhou, China
| | - Yu Liu
- Guangzhou Beogene Biotech Co., Ltd., Guangzhou, China
| | - Dan Li
- Guangzhou Beogene Biotech Co., Ltd., Guangzhou, China
| | - Chenggong Yan
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yikai Xu
- Department of Medical Imaging Center, Nanfang Hospital, Southern Medical University, Guangzhou, China
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