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Yang J, Zeng H, Luo Y, Chen Y, Wang M, Wu C, Hu P. Recent Applications of PLGA in Drug Delivery Systems. Polymers (Basel) 2024; 16:2606. [PMID: 39339068 PMCID: PMC11435547 DOI: 10.3390/polym16182606] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2024] [Revised: 08/18/2024] [Accepted: 09/11/2024] [Indexed: 09/30/2024] Open
Abstract
Poly(lactic-co-glycolic acid) (PLGA) is a widely used biodegradable and biocompatible copolymer in drug delivery systems (DDSs). In this article, we highlight the critical physicochemical properties of PLGA, including its molecular weight, intrinsic viscosity, monomer ratio, blockiness, and end caps, that significantly influence drug release profiles and degradation times. This review also covers the extensive literature on the application of PLGA in delivering small-molecule drugs, proteins, peptides, antibiotics, and antiviral drugs. Furthermore, we discuss the role of PLGA-based DDSs in the treating various diseases, including cancer, neurological disorders, pain, and inflammation. The incorporation of drugs into PLGA nanoparticles and microspheres has been shown to enhance their therapeutic efficacy, reduce toxicity, and improve patient compliance. Overall, PLGA-based DDSs holds great promise for the advancement of the treatment and management of multiple chronic conditions.
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Affiliation(s)
- Jie Yang
- Department of Burns & Plastic Surgery, Guangzhou Red Cross Hospital, Faculty of Medical Science, Jinan University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 510006, China
| | - Huiying Zeng
- College of Pharmacy, Jinan University, Guangzhou 510006, China
| | - Yusheng Luo
- International School, Jinan University, Guangzhou 510006, China
| | - Ying Chen
- Guangdong Institute for Drug Control, NMPA Key Laboratory for Quality Control and Evaluation of Pharmaceutical Excipients, Guangzhou 510660, China
| | - Miao Wang
- Guangdong Institute for Drug Control, NMPA Key Laboratory for Quality Control and Evaluation of Pharmaceutical Excipients, Guangzhou 510660, China
| | - Chuanbin Wu
- College of Pharmacy, Jinan University, Guangzhou 510006, China
| | - Ping Hu
- Department of Burns & Plastic Surgery, Guangzhou Red Cross Hospital, Faculty of Medical Science, Jinan University, Guangzhou 510006, China
- College of Pharmacy, Jinan University, Guangzhou 510006, China
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2
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Nielsen LC, Tänzer T, Rodriguez-Fernandez I, Erhart P, Liebi M. Investigating the missing-wedge problem in small-angle X-ray scattering tensor tomography across real and reciprocal space. JOURNAL OF SYNCHROTRON RADIATION 2024; 31:1327-1339. [PMID: 39196770 PMCID: PMC11371061 DOI: 10.1107/s1600577524006702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2024] [Accepted: 07/08/2024] [Indexed: 08/30/2024]
Abstract
Small-angle-scattering tensor tomography is a technique for studying anisotropic nanostructures of millimetre-sized samples in a volume-resolved manner. It requires the acquisition of data through repeated tomographic rotations about an axis which is subjected to a series of tilts. The tilt that can be achieved with a typical setup is geometrically constrained, which leads to limits in the set of directions from which the different parts of the reciprocal space map can be probed. Here, we characterize the impact of this limitation on reconstructions in terms of the missing wedge problem of tomography, by treating the problem of tensor tomography as the reconstruction of a three-dimensional field of functions on the unit sphere, represented by a grid of Gaussian radial basis functions. We then devise an acquisition scheme to obtain complete data by remounting the sample, which we apply to a sample of human trabecular bone. Performing tensor tomographic reconstructions of limited data sets as well as the complete data set, we further investigate and validate the missing wedge problem by investigating reconstruction errors due to data incompleteness across both real and reciprocal space. Finally, we carry out an analysis of orientations and derived scalar quantities, to quantify the impact of this missing wedge problem on a typical tensor tomographic analysis. We conclude that the effects of data incompleteness are consistent with the predicted impact of the missing wedge problem, and that the impact on tensor tomographic analysis is appreciable but limited, especially if precautions are taken. In particular, there is only limited impact on the means and relative anisotropies of the reconstructed reciprocal space maps.
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Affiliation(s)
- Leonard C. Nielsen
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Torne Tänzer
- Photon Science DivisionPaul Scherrer Institute (PSI)VilligenSwitzerland
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | | | - Paul Erhart
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Marianne Liebi
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
- Photon Science DivisionPaul Scherrer Institute (PSI)VilligenSwitzerland
- Institute of Materials, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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3
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Tian C, Li K, Chu F, Wei Q, Xu S, Qiang L, Gou X. Preparation and performance study of in situ mineralized bone tissue engineering scaffolds. RSC Adv 2024; 14:22420-22433. [PMID: 39010908 PMCID: PMC11248912 DOI: 10.1039/d4ra04047c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2024] [Accepted: 07/08/2024] [Indexed: 07/17/2024] Open
Abstract
Traditional bone tissue engineering techniques require the extraction and proliferation of seed cells, followed by prolonged in vitro culture to form bone tissue constructs. In contrast, in situ mineralization bone tissue engineering utilizes alkaline phosphatase within the body's microenvironment to induce scaffold mineralization. This approach promotes further proliferation and differentiation of osteoblasts and the formation of bone tissue constructs, thereby simplifying the traditional bone tissue engineering process. This study uses electrospinning technology to prepare a novel biologically active scaffold for bone tissue engineering using poly(lactic-co-glycolic acid) (PLGA) and calcium glycerophosphate. The morphology and composition of the scaffolds were characterized using SEM, EDS, and XRD, revealing well-defined fibrous structures and the successful incorporation of calcium glycerophosphate into the PLGA fibers. In vitro simulation of the bone microenvironment using alkaline phosphatase effectively catalyzed the in situ mineralization of calcium glycerophosphate within the scaffold. SEM observations showed substantial mineral aggregation on the surface of the fibrous membranes, and XRD characterization confirmed that the diffraction peaks of the minerals correspond to hydroxyapatite. The cytotoxicity, cell proliferation, and osteogenic differentiation assessments on MC3T3-E1 pre-osteoblasts cultured on the prepared scaffolds indicate that the scaffolds are non-toxic to cells and possess good osteogenic differentiation ability, enabling in situ mineralization. This suggests that the scaffolds have broad prospects for application in bone defect repair.
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Affiliation(s)
- Chunyan Tian
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
| | - Kun Li
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
| | - Fuhuan Chu
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
| | - Qiujiang Wei
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
| | - Shiqi Xu
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
- Hebei International Research Center for Medical-Engineering, Chengde Medical University Chengde 067000 Hebei China
- Chengde Medical Additive Manufacturing Technology Innovation Center, Chengde Medical University Chengde 067000 Hebei China
| | - Linhui Qiang
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
- Hebei International Research Center for Medical-Engineering, Chengde Medical University Chengde 067000 Hebei China
- Chengde Medical Additive Manufacturing Technology Innovation Center, Chengde Medical University Chengde 067000 Hebei China
| | - Xinrui Gou
- Department of Biomedical Engineering, Chengde Medical University Chengde 067000 Hebei China +86-13343396119 +86-17774937339
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4
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Iskhakova K, Wieland DCF, Marek R, Schwarze UY, Davydok A, Cwieka H, AlBaraghtheh T, Reimers J, Hindenlang B, Sefa S, Lopes Marinho A, Willumeit-Römer R, Zeller-Plumhoff B. Sheep Bone Ultrastructure Analyses Reveal Differences in Bone Maturation around Mg-Based and Ti Implants. J Funct Biomater 2024; 15:192. [PMID: 39057313 PMCID: PMC11278010 DOI: 10.3390/jfb15070192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 06/21/2024] [Accepted: 06/22/2024] [Indexed: 07/28/2024] Open
Abstract
Magnesium alloys are some of the most convenient biodegradable materials for bone fracture treatment due to their tailorable degradation rate, biocompatibility, and mechanical properties resembling those of bone. Despite the fact that magnesium-based implants and ZX00 (Mg-0.45Zn-0.45Ca in wt.%), in particular, have been shown to have suitable degradation rates and good osseointegration, knowledge gaps remain in our understanding of the impact of their degradation properties on the bone's ultrastructure. Bone is a hierarchically structured material, where not only the microstructure but also the ultrastructure are important as properties like the local mechanical response are determined by it. This study presents the first comparative analysis of bone ultrastructure parameters with high spatial resolution around ZX00 and Ti implants after 6, 12, and 24 weeks of healing. The mineralization was investigated, revealing a significant decrease in the lattice spacing of the (002) Bragg's peak closer to the ZX00 implant in comparison to Ti, while no significant difference in the crystallite size was observed. The hydroxyapatite platelet thickness and osteon density demonstrated a decrease closer to the ZX00 implant interface. Correlative indentation and strain maps obtained by scanning X-ray diffraction measurements revealed a higher stiffness and faster mechanical adaptation of the bone surrounding Ti implants as compared to the ZX00 ones. Thus, the results suggest the incorporation of Mg2+ ions into the bone ultrastructure, as well as a lower degree of remodeling and stiffness of the bone in the presence of ZX00 implants than Ti.
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Affiliation(s)
- Kamila Iskhakova
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - D. C. Florian Wieland
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Romy Marek
- Department of Orthopaedics and Traumatology, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria; (R.M.); (U.Y.S.)
| | - Uwe Y. Schwarze
- Department of Orthopaedics and Traumatology, Medical University of Graz, Auenbruggerplatz 5, 8036 Graz, Austria; (R.M.); (U.Y.S.)
- Department of Dental Medicine and Oral Health, Medical University of Graz, Billrothgasse 4, 8010 Graz, Austria
| | - Anton Davydok
- Institute of Materials Physics, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthacht, Germany;
| | - Hanna Cwieka
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Tamadur AlBaraghtheh
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Jan Reimers
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Birte Hindenlang
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Sandra Sefa
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - André Lopes Marinho
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Regine Willumeit-Römer
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
| | - Berit Zeller-Plumhoff
- Institute of Metallic Biomaterials, Helmholtz-Zentrum Hereon, Max-Planck-Straße 1, 21502 Geesthach, Germany; (H.C.); (T.A.); (J.R.); (B.H.); (S.S.); (A.L.M.); (R.W.-R.); (B.Z.-P.)
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Kessler F, Arnke K, Eggerschwiler B, Neldner Y, Märsmann S, Gröninger O, Casanova EA, Weber FA, König MA, Stark WJ, Pape HC, Cinelli P, Tiziani S. Murine iPSC-Loaded Scaffold Grafts Improve Bone Regeneration in Critical-Size Bone Defects. Int J Mol Sci 2024; 25:5555. [PMID: 38791592 PMCID: PMC11121928 DOI: 10.3390/ijms25105555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/07/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024] Open
Abstract
In certain situations, bones do not heal completely after fracturing. One of these situations is a critical-size bone defect where the bone cannot heal spontaneously. In such a case, complex fracture treatment over a long period of time is required, which carries a relevant risk of complications. The common methods used, such as autologous and allogeneic grafts, do not always lead to successful treatment results. Current approaches to increasing bone formation to bridge the gap include the application of stem cells on the fracture side. While most studies investigated the use of mesenchymal stromal cells, less evidence exists about induced pluripotent stem cells (iPSC). In this study, we investigated the potential of mouse iPSC-loaded scaffolds and decellularized scaffolds containing extracellular matrix from iPSCs for treating critical-size bone defects in a mouse model. In vitro differentiation followed by Alizarin Red staining and quantitative reverse transcription polymerase chain reaction confirmed the osteogenic differentiation potential of the iPSCs lines. Subsequently, an in vivo trial using a mouse model (n = 12) for critical-size bone defect was conducted, in which a PLGA/aCaP osteoconductive scaffold was transplanted into the bone defect for 9 weeks. Three groups (each n = 4) were defined as (1) osteoconductive scaffold only (control), (2) iPSC-derived extracellular matrix seeded on a scaffold and (3) iPSC seeded on a scaffold. Micro-CT and histological analysis show that iPSCs grafted onto an osteoconductive scaffold followed by induction of osteogenic differentiation resulted in significantly higher bone volume 9 weeks after implantation than an osteoconductive scaffold alone. Transplantation of iPSC-seeded PLGA/aCaP scaffolds may improve bone regeneration in critical-size bone defects in mice.
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Affiliation(s)
- Franziska Kessler
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Kevin Arnke
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Benjamin Eggerschwiler
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Yvonne Neldner
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Sonja Märsmann
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Olivier Gröninger
- Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland
| | - Elisa A. Casanova
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Fabienne A. Weber
- Institute of Laboratory Animal Science, University of Zurich, 8091 Zurich, Switzerland
| | | | - Wendelin J. Stark
- Institute for Chemical and Bioengineering, ETH Zurich, 8093 Zurich, Switzerland
| | - Hans-Christoph Pape
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
| | - Paolo Cinelli
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
- Center for Applied Biotechnology and Molecular Medicine (CABMM), University of Zurich, 8057 Zurich, Switzerland
| | - Simon Tiziani
- Department of Trauma Surgery, University Hospital Zurich, University of Zurich, Rämistrasse 100, 8091 Zurich, Switzerland (E.A.C.); (P.C.)
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6
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Silva Barreto I, Pierantoni M, Nielsen LC, Hammerman M, Diaz A, Novak V, Eliasson P, Liebi M, Isaksson H. Micro- and nanostructure specific X-ray tomography reveals less matrix formation and altered collagen organization following reduced loading during Achilles tendon healing. Acta Biomater 2024; 174:245-257. [PMID: 38096959 DOI: 10.1016/j.actbio.2023.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/06/2023] [Accepted: 12/07/2023] [Indexed: 12/25/2023]
Abstract
Recovery of the collagen structure following Achilles tendon rupture is poor, resulting in a high risk for re-ruptures. The loading environment during healing affects the mechanical properties of the tendon, but the relation between loading regime and healing outcome remains unclear. This is partially due to our limited understanding regarding the effects of loading on the micro- and nanostructure of the healing tissue. We addressed this through a combination of synchrotron phase-contrast X-ray microtomography and small-angle X-ray scattering tensor tomography (SASTT) to visualize the 3D organization of microscale fibers and nanoscale fibrils, respectively. The effect of in vivo loading on these structures was characterized in early healing of rat Achilles tendons by comparing full activity with immobilization. Unloading resulted in structural changes that can explain the reported impaired mechanical performance. In particular, unloading led to slower tissue regeneration and maturation, with less and more disorganized collagen, as well as an increased presence of adipose tissue. This study provides the first application of SASTT on soft musculoskeletal tissues and clearly demonstrates its potential to investigate a variety of other collagenous tissues. STATEMENT OF SIGNIFICANCE: Currently our understanding of the mechanobiological effects on the recovery of the structural hierarchical organization of injured Achilles tendons is limited. We provide insight into how loading affects the healing process by using a cutting-edge approach to for the first time characterize the 3D micro- and nanostructure of the regenerating collagen. We uncovered that, during early healing, unloading results in a delayed and more disorganized regeneration of both fibers (microscale) and fibrils (nanoscale), as well as increased presence of adipose tissue. The results set the ground for the development of further specialized protocols for tendon recovery.
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Affiliation(s)
| | - Maria Pierantoni
- Department of Biomedical Engineering, Lund University, Lund, Sweden
| | - Leonard C Nielsen
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden
| | - Malin Hammerman
- Department of Biomedical Engineering, Lund University, Lund, Sweden; Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Ana Diaz
- Photon Science Division, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - Vladimir Novak
- Photon Science Division, Paul Scherrer Institute, Villigen PSI, Switzerland
| | - Pernilla Eliasson
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden; Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden
| | - Marianne Liebi
- Department of Physics, Chalmers University of Technology, Gothenburg, Sweden; Photon Science Division, Paul Scherrer Institute, Villigen PSI, Switzerland; Institute of materials, Ecole Polytechnique fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Hanna Isaksson
- Department of Biomedical Engineering, Lund University, Lund, Sweden
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Qi J, Wu H, Liu G. Novel Strategies for Spatiotemporal and Controlled BMP-2 Delivery in Bone Tissue Engineering. Cell Transplant 2024; 33:9636897241276733. [PMID: 39305020 PMCID: PMC11418245 DOI: 10.1177/09636897241276733] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 07/22/2024] [Accepted: 07/26/2024] [Indexed: 09/25/2024] Open
Abstract
Bone morphogenetic protein-2 (BMP-2) has been commercially approved by the Food and Drug Administration for use in bone defects and diseases. BMP-2 promotes osteogenic differentiation of mesenchymal stem cells. In bone tissue engineering, BMP-2 incorporated into scaffolds can be used for stimulating bone regeneration in organoid construction, drug testing platforms, and bone transplants. However, the high dosage and uncontrollable release rate of BMP-2 challenge its clinical application, mainly due to the short circulation half-life of BMP-2, microbial contamination in bone extracellular matrix hydrogel, and the delivery method. Moreover, in clinical translation, the requirement of high doses of BMP-2 for efficacy poses challenges in cost and safety. Based on these, novel strategies should ensure that BMP-2 is delivered precisely to the desired location within the body, regulating the timing of BMP-2 release to coincide with the bone healing process, as well as release BMP-2 in a controlled manner to optimize its therapeutic effect and minimize side effects. This review highlights improvements in bone tissue engineering applying spatiotemporal and controlled BMP-2 delivery, including molecular engineering, biomaterial modification, and synergistic therapy, aiming to provide references for future research and clinical trials.
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Affiliation(s)
- Jingqi Qi
- Department of Orthopedics, Third Xiangya Hospital of Central South University, Changsha, China
- Department of Bioengineering, University of Washington, Seattle, WA, USA
| | - Hongwei Wu
- Department of Orthopedics, The Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu, China
| | - Gengyan Liu
- Department of Orthopedics, Third Xiangya Hospital of Central South University, Changsha, China
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Lu G, Li X, Wang P, Li X, Wang Y, Zhu J, Ronca A, D'Amora U, Liu W, Hui X. Polysaccharide-Based Composite Hydrogel with Hierarchical Microstructure for Enhanced Vascularization and Skull Regeneration. Biomacromolecules 2023; 24:4970-4988. [PMID: 37729544 DOI: 10.1021/acs.biomac.3c00655] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/22/2023]
Abstract
Critical-size skull defects caused by trauma, infection, and tumor resection raise great demands for efficient bone substitutes. Herein, a hybrid cross-linked hierarchical microporous hydrogel scaffold (PHCLS) was successfully assembled by a multistep procedure, which involved (i) the preparation of poly(lactic-co-glycolic)/nanohydroxyapatite (PLGA-HAP) porous microspheres, (ii) embedding the spheres in a solution of dopamine-modified hyaluronic acid and collagen I (Col I) and cross-linking via dopamine polyphenols binding to (i) Col I amino groups (via Michael addition) and (ii) PLGA-HAP (via calcium ion chelation). The introduction of PLGA-HAP not only improved the diversity of pore size and pore communication inside the matrix but also greatly enhanced the compressive strength (5.24-fold, 77.5 kPa) and degradation properties to construct a more stable mechanical structure. In particular, the PHCLS (200 mg, nHAP) promoted the proliferation, infiltration, and angiogenic differentiation of bone marrow mesenchymal stem cells in vitro, as well as significant ectopic angiogenesis and mineralization with a storage modulus enhancement of 2.5-fold after 30 days. Meanwhile, the appropriate matrix microenvironment initiated angiogenesis and early osteogenesis by accelerating endogenous stem cell recruitment in situ. Together, the PHCLS allowed substantial skull reconstruction in the rabbit cranial defect model, achieving 85.2% breaking load strength and 84.5% bone volume fractions in comparison to the natural cranium, 12 weeks after implantation. Overall, this study reveals that the hierarchical microporous hydrogel scaffold provides a promising strategy for skull defect treatment.
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Affiliation(s)
- Gonggong Lu
- Department of Neurosurgery, West China Hospital, Sichuan University, 37# Guoxue Lane, Chengdu, Sichuan 610041, P.R. China
- National Engineering Research Center for Biomaterials, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
- College of Biomedical Engineering, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
| | - Xiang Li
- Department of Neurosurgery, West China Hospital, Sichuan University, 37# Guoxue Lane, Chengdu, Sichuan 610041, P.R. China
| | - Peilei Wang
- National Engineering Research Center for Biomaterials, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
- College of Biomedical Engineering, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
| | - Xing Li
- National Engineering Research Center for Biomaterials, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
- College of Biomedical Engineering, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
| | - Yuxiang Wang
- National Engineering Research Center for Biomaterials, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
- College of Biomedical Engineering, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
| | - Jiayi Zhu
- National Engineering Research Center for Biomaterials, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
- College of Biomedical Engineering, Sichuan University, 29# Wangjiang Road, Chengdu, Sichuan 610064, P.R. China
| | - Alfredo Ronca
- National Research Council, Institute of Polymers, Composites and Biomaterials, Naples 80125, Italy
| | - Ugo D'Amora
- National Research Council, Institute of Polymers, Composites and Biomaterials, Naples 80125, Italy
| | - Wenke Liu
- Department of Neurosurgery, West China Hospital, Sichuan University, 37# Guoxue Lane, Chengdu, Sichuan 610041, P.R. China
| | - Xuhui Hui
- Department of Neurosurgery, West China Hospital, Sichuan University, 37# Guoxue Lane, Chengdu, Sichuan 610041, P.R. China
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