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Huang H, Lin Y, Jiang Y, Yao Q, Chen R, Zhao YZ, Kou L. Recombinant protein drugs-based intra articular drug delivery systems for osteoarthritis therapy. Eur J Pharm Biopharm 2023; 183:33-46. [PMID: 36563886 DOI: 10.1016/j.ejpb.2022.12.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2022] [Revised: 12/05/2022] [Accepted: 12/17/2022] [Indexed: 12/24/2022]
Abstract
Osteoarthritis (OA) is the most prevalent chronic degenerative joint disease. It weakens the motor function of patients and imposes a significant economic burden on society. The current medications commonly used in clinical practice do not meet the need for the treatment of OA. Recombinant protein drugs (RPDs) can treat OA by inhibiting inflammatory pathways, regulating catabolism/anabolism, and promoting cartilage repair, thereby showing promise as disease-modifying OA drugs (DMOADs). However, the rapid clearance and short half-life of them in the articular cavity limit their clinical translation. Therefore, the reliable drug delivery systems for extending drug treatment are necessary for the further development. This review introduces RPDs with therapeutic potential for OA, and summarizes their research progress on related drug delivery systems, and make proper discussion on the certain keys for optimal development of this area.
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Affiliation(s)
- Huirong Huang
- Wenzhou Municipal Key Laboratory of Pediatric Pharmacy, Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China; School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Yujie Lin
- Wenzhou Municipal Key Laboratory of Pediatric Pharmacy, Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou 325027, China
| | - Yiling Jiang
- Wenzhou Municipal Key Laboratory of Pediatric Pharmacy, Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou 325027, China
| | - Qing Yao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China
| | - Ruijie Chen
- Wenzhou Municipal Key Laboratory of Pediatric Pharmacy, Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China; Key Laboratory of Structural Malformations in Children of Zhejiang Province, Wenzhou 325027, China
| | - Ying-Zheng Zhao
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China.
| | - Longfa Kou
- Wenzhou Municipal Key Laboratory of Pediatric Pharmacy, Department of Pharmacy, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China; The Second School of Medicine, Wenzhou Medical University, Wenzhou 325027, China; Key Laboratory of Structural Malformations in Children of Zhejiang Province, Wenzhou 325027, China; Wenzhou Key Laboratory of Basic Science and Translational Research of Radiation Oncology, Wenzhou 325027, China.
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2
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Reversing the imbalance in bone homeostasis via sustained release of SIRT-1 agonist to promote bone healing under osteoporotic condition. Bioact Mater 2023; 19:429-443. [PMID: 35574058 PMCID: PMC9079176 DOI: 10.1016/j.bioactmat.2022.04.017] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 04/14/2022] [Accepted: 04/15/2022] [Indexed: 12/12/2022] Open
Abstract
The imbalance of bone homeostasis is the root cause of osteoporosis. However current therapeutic approaches mainly focus on either anabolic or catabolic pathways, which often fail to turn the imbalanced bone metabolism around. Herein we reported that a SIRT-1 agonist mediated molecular therapeutic strategy to reverse the imbalance in bone homeostasis by simultaneously regulating osteogenesis and osteoclastogenesis via locally sustained release of SRT2104 from mineral coated acellular matrix microparticles. Immobilization of SRT2104 on mineral coating (MAM/SRT) harnessing their electrostatic interactions resulted in sustained release of SIRT-1 agonist for over 30 days. MAM/SRT not only enhanced osteogenic differentiation and mineralization, but also attenuated the formation and function of excessive osteoclasts via integrating multiple vital upstream signals (β-catenin, FoxOs, Runx2, NFATc1, etc.) in vitro. Osteoporosis animal model also validated that it accelerated osteoporotic bone healing and improved osseointegration of the surrounding bone. Overall, our work proposes a promising strategy to treat osteoporotic bone defects by reversing the imbalance in bone homeostasis using designated small molecule drug delivery systems. A mineral coated acellular matrix microcarriers sustainably release SIRT2104 more than 30 days. This drug delivery system regulates osteogenesis and osteoclastogenesis. It can accelerate osteoporotic bone healing by reversing the imbalance in bone homeostasis.
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3
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Wang T, Jiang M, Yu X, Niu N, Chen L. Application of lignin adsorbent in wastewater Treatment: A review. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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4
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Uskoković V, Wu VM. When Nothing Turns Itself Inside out and Becomes Something: Coating Poly (Lactic-Co-Glycolic Acid) Spheres with Hydroxyapatite Nanoparticles vs. the Other Way Around. J Funct Biomater 2022; 13:jfb13030102. [PMID: 35893470 PMCID: PMC9332181 DOI: 10.3390/jfb13030102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 02/04/2023] Open
Abstract
To stabilize drugs physisorbed on the surface of hydroxyapatite (HAp) nanoparticles and prevent burst release, these nanoparticles are commonly coated with polymers. Bioactive HAp, however, becomes shielded from the surface of such core/shell entities, which partially defeats the purpose of using it. The goal of this study was to assess the biological and pharmacokinetic effects of inverting this classical core/shell structure by coating poly(lactic-co-glycolic acid) (PLGA) spheres with HAp nanoparticles. The HAp shell did not hinder the release of vancomycin; rather, it increased the release rate to a minor degree, compared to that from undecorated PLGA spheres. The decoration of PLGA spheres with HAp induced lesser mineral deposition and lesser upregulation of osteogenic markers compared to those induced by the composite particles where HAp nanoparticles were embedded inside the PLGA spheres. This was explained by homeostatic mechanisms governing the cell metabolism, which ensure than the sensation of a product of this metabolism in the cell interior or exterior is met with the reduction in the metabolic activity. The antagonistic relationship between proliferation and bone production was demonstrated by the higher proliferation rate of cells challenged with HAp-coated PLGA spheres than of those treated with PLGA-coated HAp. It is concluded that the overwhelmingly positive response of tissues to HAp-coated biomaterials for bone replacement is unlikely to be due to the direct induction of new bone growth in osteoblasts adhering to the HAp coating. Rather, these positive effects are consequential to more elementary aspects of cell attachment, mechanotransduction, and growth at the site of contact between the HAp-coated material and the tissue.
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Affiliation(s)
- Vuk Uskoković
- TardigradeNano LLC., 7 Park Vista, Irvine, CA 92604, USA;
- Department of Mechanical Engineering, San Diego State University, 5500 Campanile Dr., San Diego, CA 92182, USA
- Correspondence: or ; Tel.: +1-(415)-412-0233
| | - Victoria M. Wu
- TardigradeNano LLC., 7 Park Vista, Irvine, CA 92604, USA;
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5
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Li P, Dai X, Yan Q, Wang Z, Zhang S, Cao M. A novel modification method for polystyrene microspheres with dithizone and the adsorption properties for Pb2+. JOURNAL OF POLYMER RESEARCH 2020. [DOI: 10.1007/s10965-020-02180-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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6
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Khalil AS, Yu X, Umhoefer JM, Chamberlain CS, Wildenauer LA, Diarra GM, Hacker TA, Murphy WL. Single-dose mRNA therapy via biomaterial-mediated sequestration of overexpressed proteins. SCIENCE ADVANCES 2020; 6:eaba2422. [PMID: 32937431 PMCID: PMC7458450 DOI: 10.1126/sciadv.aba2422] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 05/19/2020] [Indexed: 06/11/2023]
Abstract
Nonviral mRNA delivery is an attractive therapeutic gene delivery strategy, as it achieves efficient protein overexpression in vivo and has a desirable safety profile. However, mRNA's short cytoplasmic half-life limits its utility to therapeutic applications amenable to repeated dosing or short-term overexpression. Here, we describe a biomaterial that enables a durable in vivo response to a single mRNA dose via an "overexpress and sequester" mechanism, whereby mRNA-transfected cells locally overexpress a growth factor that is then sequestered within the biomaterial to sustain the biologic response over time. In a murine diabetic wound model, this strategy demonstrated improved wound healing compared to delivery of a single mRNA dose alone or recombinant protein. In addition, codelivery of anti-inflammatory proteins using this biomaterial eliminated the need for mRNA chemical modification for in vivo therapeutic efficacy. The results support an approach that may be broadly applicable for single-dose delivery of mRNA without chemical modification.
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Affiliation(s)
- Andrew S Khalil
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
| | - Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
- Department of Orthopedic Surgery, Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang 310009, PR China
| | - Jennifer M Umhoefer
- Department of Biology, University of Wisconsin-Madison, Madison, WI 53705, USA
| | - Connie S Chamberlain
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
| | - Linzie A Wildenauer
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
| | - Gaoussou M Diarra
- Cardiovascular Research Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
| | - Timothy A Hacker
- Cardiovascular Research Center, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
| | - William L Murphy
- Department of Biomedical Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA.
- Department of Orthopedics and Rehabilitation, University of Wisconsin-Madison School of Medicine and Public Health, Madison, WI 53705, USA
- Department of Materials Science and Engineering, University of Wisconsin-Madison, Madison, WI 53705, USA
- Forward BIO Institute, University of Wisconsin-Madison, Madison, WI 53705, USA
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7
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Cha YL, Alam AM, Park SM, Moon YH, Kim KS, Lee JE, Kwon DE, Kang YG. Hydrothermal-process-based direct extraction of polydisperse lignin microspheres from black liquor and their physicochemical characterization. BIORESOURCE TECHNOLOGY 2020; 297:122399. [PMID: 31759855 DOI: 10.1016/j.biortech.2019.122399] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 11/06/2019] [Accepted: 11/07/2019] [Indexed: 06/10/2023]
Abstract
Lignin nano-/microstructures are widely employed for agricultural drug delivery and heavy metal removal from wastewater, and facile low-cost methods of their large-scale production are therefore highly sought after. Herein, uniform-morphology polydisperse lignin microspheres were directly extracted from black liquor by lowering its pH to <4 followed by hydrothermal treatment and featured several lignin-typical characteristics, e.g., functional groups, thermal stability, amorphousness, and monolignol units. It was assumed that lignin rearranged and assembled into microspheres of various size, shape, and uniformity depending on pH, temperature, and hydrothermal treatment time. Lignin microsphere extraction efficiency was estimated as 15.87-21.62 g L-1, and the average size of microspheres obtained under different conditions was calculated as ∼1 µm, while the C, H, O, and N contents equaled 48-62, 5-6, 30-36, and 0.2-1.5%, respectively. Thus, our method was deemed suitable for direct large-scale extraction of lignin microspheres from black liquor.
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Affiliation(s)
- Young-Lok Cha
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
| | - Al-Mahmnur Alam
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea.
| | - Sung-Min Park
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
| | - Youn-Ho Moon
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
| | - Kwang-Soo Kim
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
| | - Ji-Eun Lee
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
| | - Da-Eun Kwon
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
| | - Yong-Gu Kang
- Bioenergy Crop Research Institute, National Institute of Crop Science, Rural Development Administration, Muan 58545, Republic of Korea
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8
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Tiffany AS, Dewey MJ, Harley BAC. Sequential sequestrations increase the incorporation and retention of multiple growth factors in mineralized collagen scaffolds. RSC Adv 2020; 10:26982-26996. [PMID: 33767853 PMCID: PMC7990239 DOI: 10.1039/d0ra03872e] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Trauma induced injuries of the mouth, jaw, face, and related structures present unique clinical challenges due to their large size and complex geometry. Growth factor signaling coordinates the behavior of multiple cell types following an injury, and effective coordination of growth factor availability within a biomaterial can be critical for accelerating bone healing. Mineralized collagen scaffolds are a class of degradable biomaterial whose biophysical and compositional parameters can be adjusted to facilitate cell invasion and tissue remodeling. Here we describe the use of modified simulated body fluid treatments to enable sequential sequestration of bone morphogenic protein 2 and vascular endothelial growth factor into mineralized collagen scaffolds for bone repair. We report the capability of these scaffolds to sequester 60–90% of growth factor from solution without additional crosslinking treatments and show high levels of retention for individual (>94%) and multiple growth factors (>88%) that can be layered into the material via sequential sequestration steps. Sequentially sequestering growth factors allows prolonged release of growth factors in vitro (>94%) and suggests the potential to improve healing of large-scale bone injury models in vivo. Future work will utilize this sequestration method to induce cellular activities critical to bone healing such as vessel formation and cell migration. Trauma induced injuries of the mouth, jaw, face, and related structures present unique clinical challenges due to their large size and complex geometry.![]()
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Affiliation(s)
- Aleczandria S Tiffany
- Dept. Chemical and Biomolecular Engineering, Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 110 Roger Adams Laboratory, 600 S. Mathews Ave., Urbana, IL 61801, USA
| | - Marley J Dewey
- Dept. Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
| | - Brendan A C Harley
- Dept. Chemical and Biomolecular Engineering, Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, 110 Roger Adams Laboratory, 600 S. Mathews Ave., Urbana, IL 61801, USA.,Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
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9
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Alginate-nanohydroxyapatite hydrogel system: Optimizing the formulation for enhanced bone regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 105:109985. [DOI: 10.1016/j.msec.2019.109985] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2019] [Revised: 06/14/2019] [Accepted: 07/18/2019] [Indexed: 01/04/2023]
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10
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Injectable biomaterials for delivery of interleukin-1 receptor antagonist: Toward improving its therapeutic effect. Acta Biomater 2019; 93:123-134. [PMID: 31029831 DOI: 10.1016/j.actbio.2019.04.051] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 04/15/2019] [Accepted: 04/23/2019] [Indexed: 01/31/2023]
Abstract
Interleukin-1 receptor antagonist (IL-1Ra) is a naturally occurring anti-inflammatory cytokine that inhibits IL-1 activity and has been proposed to treat a wide variety of systemic and local inflammatory pathologies for multiple decades. However, the short half-life and high concentration required to inhibit IL-1 activity has limited its use in clinical applications. Many strategies have been developed with the goal of improving the therapeutic efficacy of IL-1Ra for a variety of pathologies, including fusing IL-1Ra to protein/peptide/polymer partners, releasing IL-1Ra from injectable polymer or mineral particles, and release of IL-1Ra from injectable coacervates and gels. This literature review examines injectable biomaterials engineered to improve IL-1Ra delivery, both locally and systemically, to increase its efficacy and ease of use in clinic. STATEMENT OF SIGNIFICANCE: Interleukin-1 receptor antagonist (IL-1Ra) is a therapeutic protein with the potential to treat numerous inflammatory conditions and diseases. However, its short biological half-life and high therapeutic concentration may limit its utility in all but a few clinical scenarios. In this review, we present the biomaterial based delivery strategies which have been explored to deliver IL-1Ra to improve its efficacy and applicability to treat inflammation.
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11
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Harvestine JN, Sheaff CS, Li C, Haudenschild AK, Gionet-Gonzales MA, Hu JC, Athanasiou KA, Marcu L, Leach JK. Multimodal Label-Free Imaging for Detecting Maturation of Engineered Osteogenic Grafts. ACS Biomater Sci Eng 2019; 5:1956-1966. [PMID: 33405522 PMCID: PMC8594456 DOI: 10.1021/acsbiomaterials.9b00007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
There is a critical need to develop noninvasive, nondestructive methods for assessing the quality of engineered constructs prior to implantation. Currently, the composition and maturity of engineered tissues are assessed using destructive, costly, and time-consuming biochemical and mechanical analyses. The goal of this study was to use noninvasive, multimodal imaging to monitor osteogenic differentiation and matrix deposition by human mesenchymal stem/stromal cells (MSCs) during in vitro culture. MSCs were encapsulated in alginate hydrogels and cultured in osteogenic conditions for 4 weeks. Samples were evaluated using fluorescence lifetime imaging (FLIm) and ultrasound backscatter microscopy (UBM) prior to traditional biochemical and mechanical testing. Using linear regression analysis, we identified strong correlations between imaging parameters (e.g., fluorescence lifetime and acoustic attenuation coefficient) and destructive mechanical and biochemical tests to assess the maturation of osteogenically induced constructs. These data demonstrate the promise of nondestructive label-free imaging techniques to noninvasively ascertain the progression and maturity of tissue engineered bone grafts.
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Affiliation(s)
- Jenna N. Harvestine
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Clay S. Sheaff
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Cai Li
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Anne K. Haudenschild
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Marissa A. Gionet-Gonzales
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - Jerry C. Hu
- Department of Biomedical Engineering, University of California, Irvine, Irvine California 92697, United States
| | - Kyriacos A. Athanasiou
- Department of Biomedical Engineering, University of California, Irvine, Irvine California 92697, United States
| | - Laura Marcu
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
| | - J. Kent Leach
- Department of Biomedical Engineering, University of California, Davis, Davis, California 95616, United States
- Department of Orthopaedic Surgery, School of Medicine, UC Davis Health, Sacramento, California 95817, United States
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12
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Ge M, Ge K, Gao F, Yan W, Liu H, Xue L, Jin Y, Ma H, Zhang J. Biomimetic mineralized strontium-doped hydroxyapatite on porous poly(l-lactic acid) scaffolds for bone defect repair. Int J Nanomedicine 2018; 13:1707-1721. [PMID: 29599615 PMCID: PMC5866725 DOI: 10.2147/ijn.s154605] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Introduction poly(l-lactic acid) (PLLA) has been approved for clinical use by the US Food and Drug Administration (FDA); however, their stronger hydrophobicity and relatively fast degradation rate restricted their widespread application. In consideration of the composition of bone, the inorganic–organic composite has a great application prospect in bone tissue engineering. Many inorganic–organic composite scaffolds were prepared by directly mixing the active ingredient, but this method is uncontrolled and will lead to lack of homogeneity in the polymer matrix. Strontium (Sr) is an admirable addition to improve the bioactivity and bone induction of hydroxyapatite (HA). To our knowledge, the application of biomimetic mineralized strontium-doped hydroxyapatite on porous poly(l-lactic acid) (Sr-HA/PLLA) scaffolds for bone defect repair has never been reported till date. Biomimetic mineralized Sr-HA/PLLA porous scaffold was developed in this study. The results indicated that the Sr-HA/PLLA porous scaffold could improve the surface hydrophobicity, reduce the acidic environment of the degradation, and enhance the osteoinductivity; moreover, the ability of protein adsorption and the modulus of compression were increased. The results also clearly showed the effectiveness of the Sr-HA/PLLA porous scaffold in promoting cell adhesion, proliferation, and alkaline phosphatase (ALP) activity. The micro computed tomography (micro-CT) results showed that more new bones were formed by Sr-HA/PLLA porous scaffold treatment. The histological results confirmed the osteoinductivity of the Sr-HA/PLLA porous scaffold. The results suggested that the Sr-HA/PLLA porous scaffold has a good application prospect in bone tissue engineering in the future. Purpose The purpose of this study was to promote the bone repair. Materials and methods Surgical operation of rabbits was carried out in this study. Results The results showed that formation of a large number of new bones by the Sr-HA/PLLA porous scaffold treatment is possible. Conclusion Biomimetic mineralized Sr-HA/PLLA porous scaffold could effectively promote the restoration of bone defects in vivo.
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Affiliation(s)
- Min Ge
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China.,Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding, People's Republic of China
| | - Kun Ge
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China.,Department of Science and Technology, Affiliated Hospital of Hebei University, Baoding, People's Republic of China
| | - Fei Gao
- Department of Orthopedics, Affiliated Hospital of Hebei University, Baoding, People's Republic of China
| | - Weixiao Yan
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China.,Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding, People's Republic of China
| | - Huifang Liu
- Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding, People's Republic of China
| | - Li Xue
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China
| | - Yi Jin
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China.,Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding, People's Republic of China
| | - Haiyun Ma
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China
| | - Jinchao Zhang
- Department of Chemistry, College of Chemistry and Environmental Science, Hebei University, Baoding, People's Republic of China.,Key Laboratory of Chemical Biology of Hebei Province, Key Laboratory of Medicinal Chemistry and Molecular Diagnosis of the Ministry of Education, Hebei University, Baoding, People's Republic of China
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13
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Khalil AS, Yu X, Xie AW, Fontana G, Umhoefer JM, Johnson HJ, Hookway TA, McDevitt TC, Murphy WL. Functionalization of microparticles with mineral coatings enhances non-viral transfection of primary human cells. Sci Rep 2017; 7:14211. [PMID: 29079806 PMCID: PMC5660152 DOI: 10.1038/s41598-017-14153-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 10/02/2017] [Indexed: 12/28/2022] Open
Abstract
Gene delivery to primary human cells is a technology of critical interest to both life science research and therapeutic applications. However, poor efficiencies in gene transfer and undesirable safety profiles remain key limitations in advancing this technology. Here, we describe a materials-based approach whereby application of a bioresorbable mineral coating improves microparticle-based transfection of plasmid DNA lipoplexes in several primary human cell types. In the presence of these mineral-coated microparticles (MCMs), we observed up to 4-fold increases in transfection efficiency with simultaneous reductions in cytotoxicity. We identified mechanisms by which MCMs improve transfection, as well as coating compositions that improve transfection in three-dimensional cell constructs. The approach afforded efficient transfection in primary human fibroblasts as well as mesenchymal and embryonic stem cells for both two- and three-dimensional transfection strategies. This MCM-based transfection is an advancement in gene delivery technology, as it represents a non-viral approach that enables highly efficient, localized transfection and allows for transfection of three-dimensional cell constructs.
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Affiliation(s)
- Andrew S Khalil
- Department of Biomedical Engineering-University of Wisconsin-Madison, Madison, WI, USA
| | - Xiaohua Yu
- Department of Orthopedics and Rehabilitation-University of Wisconsin-Madison, Madison, WI, USA
| | - Angela W Xie
- Department of Biomedical Engineering-University of Wisconsin-Madison, Madison, WI, USA
| | - Gianluca Fontana
- Department of Biomedical Engineering-University of Wisconsin-Madison, Madison, WI, USA
| | - Jennifer M Umhoefer
- Department of Biomedical Engineering-University of Wisconsin-Madison, Madison, WI, USA
| | - Hunter J Johnson
- Department of Biomedical Engineering-University of Wisconsin-Madison, Madison, WI, USA
| | - Tracy A Hookway
- Department of Bioengineering & Therapeutic Sciences-University of California, San Francisco, San Francisco, CA, USA
- Roddenberry Center for Stem Cell Biology & Medicine-Gladstone Institutes, San Francisco, CA, USA
| | - Todd C McDevitt
- Department of Bioengineering & Therapeutic Sciences-University of California, San Francisco, San Francisco, CA, USA
- Roddenberry Center for Stem Cell Biology & Medicine-Gladstone Institutes, San Francisco, CA, USA
| | - William L Murphy
- Department of Biomedical Engineering-University of Wisconsin-Madison, Madison, WI, USA.
- Department of Orthopedics and Rehabilitation-University of Wisconsin-Madison, Madison, WI, USA.
- The Materials Science Program-University of Wisconsin-Madison, Madison, WI, USA.
- The Stem Cell and Regenerative Medicine Center-University of Wisconsin-Madison, Madison, WI, USA.
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14
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Sun Y, Li Y, Xu J, Huang L, Qiu T, Zhong S. Interconnectivity of macroporous molecularly imprinted polymers fabricated by hydroxyapatite-stabilized Pickering high internal phase emulsions-hydrogels for the selective recognition of protein. Colloids Surf B Biointerfaces 2017; 155:142-149. [DOI: 10.1016/j.colsurfb.2017.04.009] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 03/25/2017] [Accepted: 04/04/2017] [Indexed: 12/25/2022]
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15
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Synthesis of poly(n-octadecyl methacrylate-co-2-hydroxyethyl methacrylate) copolymer and their utilization as polymeric stabilizer in the preparation of PCL microspheres. Polym Bull (Berl) 2017. [DOI: 10.1007/s00289-016-1795-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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16
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Watanabe S, Kashiwagi R, Matsumoto M. Alternate Spray-coating for the Direct Fabrication of Hydroxyapatite Films without Crystal Growth Step in Solution. J Oleo Sci 2017; 66:279-284. [DOI: 10.5650/jos.ess16142] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Satoshi Watanabe
- Department of Applied Chemistry and Biochemistry, Kumamoto University
| | - Rei Kashiwagi
- Department of Materials Science and Technology, Tokyo University of Science
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17
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Bjørnøy SH, Bassett DC, Ucar S, Strand BL, Andreassen JP, Sikorski P. A correlative spatiotemporal microscale study of calcium phosphate formation and transformation within an alginate hydrogel matrix. Acta Biomater 2016; 44:254-66. [PMID: 27567962 DOI: 10.1016/j.actbio.2016.08.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2016] [Revised: 08/16/2016] [Accepted: 08/19/2016] [Indexed: 01/24/2023]
Abstract
UNLABELLED The modification of soft hydrogels with hard inorganic components is a method used to form composite materials with application in non-load-bearing bone tissue engineering. The inclusion of an inorganic component may provide mechanical enhancement, introduce osteoconductive or osteoinductive properties, or change other aspects of interactions between native or implanted cells and the material. A thorough understanding of the interactions between such components is needed to improve the rational design of such biomaterials. To achieve this goal, model systems which could allow study of the formation and transformation of mineral phases within a hydrogel network with a range of experimental methods and high spatial and time resolution are needed. Here, we report a detailed investigation of the formation and transformation process of calcium phosphate mineral within an alginate hydrogel matrix. A combination of optical microscopy, confocal Raman microspectroscopy and electron microscopy was used to investigate the spatial distribution, morphology and crystal phase of the calcium phosphate mineral, as well as to study transformation of the mineral phases during the hydrogel mineralization process and upon incubation in a simulated body fluid. It was found, that under the conditions used in this work, mineral initially formed as a metastable amorphous calcium phosphate phase (ACP). The ACP particles had a distinctive spherical morphology and transformed within minutes into brushite in the presence of brushite seed crystals or into octacalcium phosphate, when no seeds were present in the hydrogel matrix. Incubation of brushite-alginate composites in simulated body fluid resulted in formation of hydroxyapatite. The characterization strategy presented here allows for non-destructive, in situ observation of mineralization processes in optically transparent hydrogels with little to no sample preparation. STATEMENT OF SIGNIFICANCE The precipitation and transformations of calcium phosphates (CaP) is a complex process, where both formation kinetics and the stability of different mineral phases control the outcome. This situation is even more complex if CaP is precipitated in a hydrogel matrix, where one can expect the organic matrix to modulate crystallization by introducing supersaturation gradients or changing the nucleation and growth kinetics of crystals. In this study we apply a range of characterization techniques to study the mineral formation and transformations of CaP within an alginate matrix with spatiotemporal resolution. It demonstrates how a detailed investigation of the mineral precipitation and transformations can aid in the future rational design of hydrogel-based materials for bone tissue engineering and studies of biomineralization processes.
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Affiliation(s)
- Sindre H Bjørnøy
- Department of Physics, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - David C Bassett
- Department of Physics, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Seniz Ucar
- Department of Chemical Engineering, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Berit L Strand
- Department of Biotechnology, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Jens-Petter Andreassen
- Department of Chemical Engineering, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
| | - Pawel Sikorski
- Department of Physics, NTNU, Norwegian University of Science and Technology, 7491 Trondheim, Norway.
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18
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Watanabe S, Iida M, Matsumoto M. Alternate Calcification in Microcapillaries for the Fabrication of Hydroxyapatite Films without Light Exposure, Calcination, or Applied Voltage. J Oleo Sci 2016; 65:853-860. [PMID: 27628734 DOI: 10.5650/jos.ess16046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
We discuss an alternate method for calcification in microcapillaries for fabricating calcium phosphate films using silicone molds and calcifying solutions. Calcium phosphate films with a line/space of 5-50 µm were fabricated by controlling the concentrations of calcium chloride and sodium phosphate solutions. Plate-type crystals of hydroxyapatite were grown when the calcium phosphate films were immersed in hydroxyapatite precursors. In the initial stage of hydroxyapatite crystal growth, the c-plane of the crystals was grown parallel to the substrates, and subsequently the growth followed with the c-plane growing perpendicular to the substrates. In narrow capillaries, dendritic structures were formed with a tendency to grow in a direction parallel to the direction of the microcapillaries. This technique is useful in the micropatterning of biocompatible ceramics with a minimized material consumption and a short fabrication time.
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Affiliation(s)
- Satoshi Watanabe
- Department of Applied Chemistry and Biochemistry, Kumamoto University
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19
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Jensen ACS, Brif A, Pokroy B, Hinge M, Birkedal H. Morphology-preserving transformation of minerals mediated by a temperature-responsive polymer membrane: calcite to hydroxyapatite. CrystEngComm 2016. [DOI: 10.1039/c5ce02245b] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
A membrane of a temperature sensate block copolymer facilitates transformation of calcite single crystals into hydroxyapatite while preserving overall particle morphology.
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Affiliation(s)
- A. C. S. Jensen
- Department of Chemistry & iNANO
- Aarhus University
- DK-8000 Aarhus C, Denmark
| | - A. Brif
- Department of Materials Science and Engineering & Russel Berrie Nanotechnology Institute
- Technion – Israel Institute of Technology
- IL-32000 Haifa, Israel
| | - B. Pokroy
- Department of Materials Science and Engineering & Russel Berrie Nanotechnology Institute
- Technion – Israel Institute of Technology
- IL-32000 Haifa, Israel
| | - M. Hinge
- Department of Engineering
- Aarhus University
- DK-8000 Aarhus C, Denmark
| | - H. Birkedal
- Department of Chemistry & iNANO
- Aarhus University
- DK-8000 Aarhus C, Denmark
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20
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Dang PN, Dwivedi N, Yu X, Phillips L, Bowerman C, Murphy WL, Alsberg E. Guiding Chondrogenesis and Osteogenesis with Mineral-Coated Hydroxyapatite and BMP-2 Incorporated within High-Density hMSC Aggregates for Bone Regeneration. ACS Biomater Sci Eng 2015; 2:30-42. [DOI: 10.1021/acsbiomaterials.5b00277] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Phuong N. Dang
- Department
of Biomedical Engineering, Case Western Reserve University, Wickenden
218, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Neha Dwivedi
- Department
of Biomedical Engineering, Case Western Reserve University, Wickenden
218, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Xiaohua Yu
- Department
of Biomedical Engineering, Wisconsin Institute for Medical Research, University of Wisconsin, Room 5405, Madison, Wisconsin 53706, United States
| | - Lauren Phillips
- Department
of Biomedical Engineering, Case Western Reserve University, Wickenden
218, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - Caitlin Bowerman
- Department
of Biomedical Engineering, Case Western Reserve University, Wickenden
218, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
| | - William L. Murphy
- Departments
of Biomedical Engineering and Orthopedics and Rehabilitation, Wisconsin
Institute for Medical Research, University of Wisconsin, Room 5405, Madison, Wisconsin 53706, United States
| | - Eben Alsberg
- Departments
of Biomedical Engineering and Orthopaedic Surgery, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, Ohio 44106, United States
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21
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The Effect of Alendronate Loaded Biphasic Calcium Phosphate Scaffolds on Bone Regeneration in a Rat Tibial Defect Model. Int J Mol Sci 2015; 16:26738-53. [PMID: 26561810 PMCID: PMC4661841 DOI: 10.3390/ijms161125982] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Revised: 10/22/2015] [Accepted: 10/27/2015] [Indexed: 01/02/2023] Open
Abstract
This study investigated the effect of alendronate (Aln) released from biphasic calcium phosphate (BCP) scaffolds. We evaluated the in vitro osteogenic differentiation of Aln/BCP scaffolds using MG-63 cells and the in vivo bone regenerative capability of Aln/BCP scaffolds using a rat tibial defect model with radiography, micro-computed tomography (CT), and histological examination. In vitro studies included the surface morphology of BCP and Aln-loaded BCP scaffolds visualized using field-emission scanning electron microscope, release kinetics of Aln from BCP scaffolds, alkaline phosphatase (ALP) activity, calcium deposition, and gene expression. The in vitro studies showed that sustained release of Aln from the BCP scaffolds consisted of porous microstructures, and revealed that MG-63 cells cultured on Aln-loaded BCP scaffolds showed significantly increased ALP activity, calcium deposition, and gene expression compared to cells cultured on BCP scaffolds. The in vivo studies using radiograph and histology examination revealed abundant callus formation and bone maturation at the site in the Aln/BCP groups compared to the control group. However, solid bony bridge formation was not observed at plain radiographs until 8 weeks. Micro-CT analysis revealed that bone mineral density and bone formation volume were increased over time in an Aln concentration-dependent manner. These results suggested that Aln/BCP scaffolds have the potential for controlling the release of Aln and enhance bone formation and mineralization.
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22
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Watanabe S, Hayashi F, Matsumoto M. Hydrogel-free alternate soaking technique for micropatterning of bioactive ceramics on wettability-patterned substrates around room temperature. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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23
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Wen T, Wu X, Liu M, Xing Z, Wang X, Xu AW. Efficient capture of strontium from aqueous solutions using graphene oxide-hydroxyapatite nanocomposites. Dalton Trans 2015; 43:7464-72. [PMID: 24604380 DOI: 10.1039/c3dt53591f] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Three-dimensional hierarchical flower-like graphene oxide-hydroxyapatite (GO-HAp) nanocomposites were synthesized by a simple biomimetic method in a modified simulated body fluid (mSBF). The obtained GO-HAp nanocomposites were characterized by field-emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transformed infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Raman spectroscopy, and N2 adsorption-desorption analysis. The formation mechanism was proposed and the prepared GO-HAp was applied as an adsorbent to remove strontium from large volumes of aqueous solutions. A maximum adsorption capacity of 702.18 mg g(-1) was achieved on GO-HAp, almost two fold higher than that of bare HAp and nine fold higher than that of GO. The effects of pH, adsorbent content, contact time and Sr(2+) initial concentrations on Sr(2+) removal from solution by GO-HAp were systematically investigated, and the results indicated that the removal of Sr(2+) by GO-HAp was weakly dependent on solution pH. The results herein reveal that the GO-HAp nanocomposites had exceptional potential as a suitable material for preconcentration and solidification of radiostrontium from large volumes of aqueous solutions in nuclear waste management and radiostrontium pollution cleanup.
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Affiliation(s)
- Tao Wen
- School for Radiological and Interdisciplinary Sciences, Soochow University, Suzhou 215123, P. R. China.
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24
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Saito E, Suarez-Gonzalez D, Murphy WL, Hollister SJ. Biomineral coating increases bone formation by ex vivo BMP-7 gene therapy in rapid prototyped poly(L-lactic acid) (PLLA) and poly(ε-caprolactone) (PCL) porous scaffolds. Adv Healthc Mater 2015; 4:621-32. [PMID: 25515846 DOI: 10.1002/adhm.201400424] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Indexed: 11/12/2022]
Abstract
Porousbiodegradable polymer scaffolds are widely utilized for bone tissue engineering, but are not osteoconductive like calcium phosphate scaffolds. We combine indirect solid freeform fabrication (SFF), ex vivo gene therapy, with biomineral coating to compare the effect of biomineral coating on bone regeneration for Poly (L-lactic acid) (PLLA) and Poly (ε-caprolactone) (PCL) scaffolds with the same porous architecture. Scanning electron microscope (SEM) and micro-computed tomography (μ-CT) demonstrate PLLA and PCL scaffolds have the same porous architecture and are completely coated. All scaffolds are seeded with human gingival fibroblasts (HGF) transduced with adenovirus encoded with either bone morphogenetic protein 7 (BMP-7) or green fluorescent protein (GFP), and implanted into mice subcutaneously for 3 and 10 weeks. Only scaffolds with BMP-7 transduced HGFs show mineralized tissue formation. At 3 weeks some blood vessel-like structures are observed in coated PLLA and PCL scaffolds, but there is no significant difference in bone ingrowth between the coated and uncoated scaffolds for either PLLA or PCL. At 10 weeks, however, coated scaffolds (both PLLA and PCL) have significantly more bone ingrowth than uncoated scaffolds, which have more fibrous tissue. Coated PLLA scaffolds have improved mechanical properties compared with uncoated PLLA scaffolds due to increased bone ingrowth.
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Affiliation(s)
- Eiji Saito
- Department of Biomedical Engineering; 1101 Beal Ave. University of Michigan; Ann Arbor MI 48109-2099 USA
| | | | - William L. Murphy
- Materials Science Program; University of Wisconsin; Madison WI 53706 USA
- Department of Biomedical Engineering; University of Wisconsin; Madison WI 53706 USA
- Department of Orthopedics and Rehabilitation; University of Wisconsin; Madison WI 53706 USA
| | - Scott J. Hollister
- Department of Biomedical Engineering; 1101 Beal Ave. University of Michigan; Ann Arbor MI 48109-2099 USA
- Department of Mechanical Engineering; University of Michigan; Ann Arbor MI 48109-2125 USA
- Department of Surgery; University of Michigan; Ann Arbor MI 48109-032 USA
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25
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Azzaoui K, Mejdoubi E, Lamhamdi A, Zaoui S, Berrabah M, Elidrissi A, Hammouti B, Fouda MM, Al-Deyab SS. Structure and properties of hydroxyapatite/hydroxyethyl cellulose acetate composite films. Carbohydr Polym 2015; 115:170-6. [DOI: 10.1016/j.carbpol.2014.08.089] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2014] [Revised: 08/12/2014] [Accepted: 08/13/2014] [Indexed: 10/24/2022]
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26
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Chamberlain CS, Lee JS, Leiferman EM, Maassen NX, Baer GS, Vanderby R, Murphy WL. Effects of BMP-12-releasing sutures on Achilles tendon healing. Tissue Eng Part A 2014; 21:916-27. [PMID: 25354567 DOI: 10.1089/ten.tea.2014.0001] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Tendon healing is a complex coordinated event orchestrated by numerous biologically active proteins. Unfortunately, tendons have limited regenerative potential and as a result, repair may be protracted months to years. Current treatment strategies do not offer localized delivery of biologically active proteins, which may result in reduced therapeutic efficacy. Surgical sutures coated with nanostructured minerals may provide a potentially universal tool to efficiently incorporate and deliver biologically active proteins directly to the wound. Additionally, previous reports indicated that treatment with bone morphogenetic protein-12 (BMP-12) improved tendon healing. Based on this information, we hypothesized that mineral-coated surgical sutures may be an effective platform for localized BMP-12 delivery to an injured tendon. The objective of this study was, therefore, to elucidate the healing effects of mineral-coated sutures releasing BMP-12 using a rat Achilles healing model. The effects of BMP-12-releasing sutures were also compared with standard BMP-12 delivery methods, including delivery of BMP-12 through collagen sponge or direct injection. Rat Achilles tendons were unilaterally transected and repaired using BMP-12-releasing suture (0, 0.15, 1.5, or 3.0 μg), collagen sponge (0 or 1.5 μg BMP-12), or direct injection (0 or 1.5 μg). By 14 days postinjury, repair with BMP-12-releasing sutures reduced the appearance of adhesions to the tendon and decreased total cell numbers. BMP-12 released from sutures and collagen sponge also tended to improve collagen organization when compared with BMP-12 delivered through injection. Based on these results, the release of a protein from sutures was able to elicit a biological response. Furthermore, BMP-12-releasing sutures modulated tendon healing, and the delivery method dictated the response of the healing tissue to BMP-12.
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Affiliation(s)
- Connie S Chamberlain
- 1 Department of Orthopedics and Rehabilitation, University of Wisconsin , Madison, Wisconsin
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27
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Yu X, Khalil A, Dang PN, Alsberg E, Murphy WL. Multilayered Inorganic Microparticles for Tunable Dual Growth Factor Delivery. ADVANCED FUNCTIONAL MATERIALS 2014; 24:3082-3093. [PMID: 25342948 PMCID: PMC4204399 DOI: 10.1002/adfm.201302859] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/03/2023]
Abstract
There is an increasing need to control the type, quantity, and timing of growth factors released during tissue healing. Sophisticated delivery systems offering the ability to deliver multiple growth factors with independently tunable kinetics are highly desirable. Here, a multilayered, mineral coated micro-particle (MCMs) platform that can serve as an adaptable dual growth factor delivery system is developed. Bone morphogenetic protein-2 (BMP-2) and vascular endothelial growth factor (VEGF) are bound to the mineral coatings with high binding efficiencies of up to 80%. BMP-2 is firstly bound onto a 1st mineral coating layer; then VEGF is bound onto a 2nd mineral coating layer. The release of BMP-2 is sustained over a period of 50 days while the release of VEGF is a typical two-phase release with rapid release in the first 14 days and more sustained release for the following 36 days. Notably, the release behaviors of both growth factors can be independently tailored by changing the intrinsic properties of the mineral coatings. Furthermore, the release of BMP-2 can be tuned by changing the thickness of the 2nd layer. This injectable microparticle based delivery platform with tunable growth factor release has immense potential for applications in tissue engineering and regenerative medicine.
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Affiliation(s)
- Xiaohua Yu
- Department of Biomedical Engineering, University of Wisconsin, 1111 Highland Ave, Madison, WI, 53705, USA
| | - Andrew Khalil
- Department of Biomedical Engineering, University of Wisconsin, 1111 Highland Ave, Madison, WI, 53705, USA
| | - Phuong Ngoc Dang
- Department of Biomedical Engineering and Orthopaedic Surgery, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
| | - Eben Alsberg
- Department of Biomedical Engineering and Orthopaedic Surgery, Case Western Reserve University, 10900 Euclid Avenue, Cleveland, OH, 44106, USA
- AO Foundation Collaborative Research Center, Clavadelerstrasse 8, Davos, 7270, Switzerland
| | - William L. Murphy
- Department of Biomedical Engineering, University of Wisconsin, 1111 Highland Ave, Madison, WI, 53705, USA
- AO Foundation Collaborative Research Center, Clavadelerstrasse 8, Davos, 7270, Switzerland
- Department of Orthopedics and Rehabilitation, 1300 University Ave, University of Wisconsin, Madison, WI, 53705, USA
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28
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Liu H, Cheng J, Chen F, Hou F, Bai D, Xi P, Zeng Z. Biomimetic and cell-mediated mineralization of hydroxyapatite by carrageenan functionalized graphene oxide. ACS APPLIED MATERIALS & INTERFACES 2014; 6:3132-40. [PMID: 24527702 DOI: 10.1021/am4057826] [Citation(s) in RCA: 93] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In bone tissue engineering, it is imperative to design multifunctional biomaterials that can induce and assemble bonelike apatite that is close to natural bone. In this study, graphene oxide (GO) was functionalized by carrageenan. The resulting GO-carrageenan (GO-Car) composite was further used as a substrate for biomimetic and cell-mediated mineralization of hydroxyapatite (HA). It was confirmed that carrageenan on the GO surface facilitated the nucleation of HA. The observation of the effect of the GO-Car on the adhesion, morphology, and proliferation of MC3T3-E1 cells was investigated. In vitro studies clearly show the effectiveness of GO-Car in promoting HA mineralization and cell differentiation. The results of this study suggested that the GO-Car hybrid will be a promising material for bone regeneration and implantation.
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Affiliation(s)
- Hongyan Liu
- Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province, State Key Laboratory of Applied Organic Chemistry, College of Chemistry and Chemical Engineering, ‡The Research Center of Biomedical Nanotechnology, and §Key Lab of Preclinical Study for New Drugs of Gansu Province, School of Basic Medical Sciences, Lanzhou University , Lanzhou 730000, P. R. China
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29
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Bastari K, Arshath M, Ng ZHM, Chia JH, Yow ZXD, Sana B, Tan MFC, Lim S, Loo SCJ. A controlled release of antibiotics from calcium phosphate-coated poly(lactic-co-glycolic acid) particles and their in vitro efficacy against Staphylococcus aureus biofilm. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2014; 25:747-57. [PMID: 24370968 DOI: 10.1007/s10856-013-5125-9] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2013] [Accepted: 12/13/2013] [Indexed: 05/28/2023]
Abstract
Ceramic-polymer hybrid particles, intended for osteomyelitis treatment, were fabricated by preparing poly(lactic-co-glycolic acid) particles through an emulsion solvent evaporation technique, followed by calcium phosphate (CaP) coating via a surface adsorption-nucleation method. The presence of CaP coating on the surface of the particles was confirmed by scanning electron microscopy, energy-dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. Subsequently, two antibiotics for treating bone infection, nafcillin (hydrophilic) and levofloxacin (amphiphilic), were loaded into these hybrid particles and their in vitro drug release studies were investigated. The CaP coating was shown to reduce burst release, while providing sustained release of the antibiotics for up to 4 weeks. In vitro bacterial study against Staphylococcus aureus demonstrated the capability of these antibiotic-loaded hybrid particles to inhibit biofilm formation as well as deteriorate established biofilm, making this hybrid system a potential candidate for further investigation for osteomyelitis treatment.
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Affiliation(s)
- Kelsen Bastari
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
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30
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Suárez-González D, Lee JS, Diggs A, Lu Y, Nemke B, Markel M, Hollister SJ, Murphy WL. Controlled multiple growth factor delivery from bone tissue engineering scaffolds via designed affinity. Tissue Eng Part A 2013; 20:2077-87. [PMID: 24350567 DOI: 10.1089/ten.tea.2013.0358] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
It is known that angiogenesis plays an important role in bone regeneration and that release of angiogenic and osteogenic growth factors can enhance bone formation. Multiple growth factors play key roles in processes that lead to tissue formation/regeneration during natural tissue development and repair. Therefore, treatments aiming to mimic tissue regeneration can benefit from multiple growth factor release, and there remains a need for simple clinically relevant approaches for dual growth factor release. We hypothesized that mineral coatings could be used as a platform for controlled incorporation and release of multiple growth factors. Specifically, mineral-coated scaffolds were "dip coated" in multiple growth factor solutions, and growth factor binding and release were dictated by the growth factor-mineral binding affinity. Beta tricalcium phosphate (β-TCP) scaffolds were fabricated using indirect solid-free form fabrication techniques and coated with a thin conformal mineral layer. Mineral-coated β-TCP scaffolds were sequentially dipped in recombinant human vascular endothelial growth factor (rhVEGF) and a modular bone morphogenetic peptide, a mineral-binding version of bone morphogenetic protein 2 (BMP2), solutions to allow for the incorporation of each growth factor. The dual release profile showed sustained release of both growth factors for over more than 60 days. Scaffolds releasing either rhVEGF alone or the combination of growth factors showed an increase in blood vessel ingrowth in a dose-dependent manner in a sheep intramuscular implantation model. This approach demonstrates a "modular design" approach, in which a controllable biologics carrier is integrated into a structural scaffold as a thin surface coating.
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Affiliation(s)
- Darilis Suárez-González
- 1 Department of Surgery, School of Medicine and Public Health, University of Wisconsin-Madison , Madison, Wisconsin
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31
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Chanchareonsook N, Tideman H, Feinberg SE, Jongpaiboonkit L, Lee S, Flanagan C, Krishnaswamy G, Jansen J. Segmental mandibular bone reconstruction with a carbonate-substituted hydroxyapatite-coated modular endoprosthetic poly(ɛ-caprolactone) scaffold inMacaca fascicularis. J Biomed Mater Res B Appl Biomater 2013; 102:962-76. [DOI: 10.1002/jbm.b.33077] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Revised: 10/03/2013] [Accepted: 10/12/2013] [Indexed: 01/13/2023]
Affiliation(s)
| | - Henk Tideman
- Department of Oral and Maxillofacial Surgery, Research advisor; National Dental Centre; Singapore Singapore
| | - Stephen E. Feinberg
- Department of Oral and Maxillofacial Surgery; University of Michigan; Ann Arbor Michigan
- Department of Biomedical Engineering; College of Engineering, University of Michigan; Ann Arbor Michigan
| | | | - Shermin Lee
- Department of Oral and Maxillofacial Surgery; National Dental Centre; Singapore Singapore
| | - Colleen Flanagan
- Department of Biomedical Engineering; College of Engineering, University of Michigan; Ann Arbor Michigan
| | - Gita Krishnaswamy
- Centre for Quantitative Medicine; Duke-NUS Graduate Medical School; Singapore Singapore
| | - John Jansen
- Department of Biomaterials; Radboud University Nijmegen Medical Centre; Nijmegen The Netherlands
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32
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Asanithi P. Surface porosity and roughness of micrographite film for nucleation of hydroxyapatite. J Biomed Mater Res A 2013; 102:2590-9. [DOI: 10.1002/jbm.a.34930] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Accepted: 08/16/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Piyapong Asanithi
- Department of Physics, Faculty of Science; King Mongkut's University of Technology Thonburi; Bangkok 10140 Thailand
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Davis HE, Binder BY, Schaecher P, Yakoobinsky DD, Bhat A, Leach JK. Enhancing osteoconductivity of fibrin gels with apatite-coated polymer microspheres. Tissue Eng Part A 2013; 19:1773-82. [PMID: 23560390 PMCID: PMC3700018 DOI: 10.1089/ten.tea.2012.0288] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2012] [Accepted: 03/08/2013] [Indexed: 10/27/2022] Open
Abstract
Fibrin gels are a promising material for use in promoting bone repair and regeneration due to their ease of implant formation, tailorability, biocompatibility, and degradation by natural processes. However, these materials lack necessary osteoconductivity to nucleate calcium, integrate with surrounding bone, and promote bone formation. Polymeric substrata formed from poly(lactide-co-glycolide) (PLG) are widely used in bone tissue engineering. A carbonated apatite layer of bone-like mineral can be successfully grown on the surface of PLG microspheres after a multiday incubation process in modified simulated body fluid. Such coatings improve the osteoconductivity of the polymer, provide nucleation sites for cell-secreted calcium, and enhance the potential osseointegration with host tissue. We examined the capacity of mineralized polymeric microspheres suspended within fibrin hydrogels to enhance the osteoconductivity of fibrin gels and increase the osteogenic potential of these materials. The inclusion of microparticles, both nonmineralized and mineralized, reduced the capacity of mesenchymal stem cells (MSCs) to contract the gel. When cultured in osteogenic media, we detected a near linear increase in both calcium and phosphate incorporation in gels containing mineralized microspheres and entrapped MSCs. The osteoconductivity of acellular fibrin gels with mineralized and nonmineralized microspheres was assessed in a rodent calvarial bone defect over 12 weeks. Compared to untreated rodent calvarial bone defects, we detected significant increases in early vascularization when treated with fibrin gels, with greater vascularization, on average, occurring with gels containing microspheres. We detected a trend for increased bone mineral density in gels containing mineralized microspheres after 12 weeks. These findings demonstrate that the osteoconductivity of fibrin gels can be increased by inclusion of mineralized microspheres, but additional signals may be required to rapidly accelerate bone repair.
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Affiliation(s)
- Hillary E. Davis
- Biomedical Engineering Graduate Group, University of California Davis, Davis, California
| | - Bernard Y.K. Binder
- Biomedical Engineering Graduate Group, University of California Davis, Davis, California
| | - Phillip Schaecher
- Department of Biomedical Engineering, University of California Davis, Davis, California
| | - Dana D. Yakoobinsky
- Department of Biomedical Engineering, University of California Davis, Davis, California
| | - Archana Bhat
- Department of Biomedical Engineering, University of California Davis, Davis, California
| | - J. Kent Leach
- Biomedical Engineering Graduate Group, University of California Davis, Davis, California
- Department of Biomedical Engineering, University of California Davis, Davis, California
- Department of Orthopaedic Surgery, School of Medicine, University of California Davis, Sacramento, California
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Fujii S, Okada M, Furuzono T. Hydroxyapatite‐Biodegradable Polymer Nanocomposite Microspheres toward Injectable Cell Scaffold. Biomimetics (Basel) 2013. [DOI: 10.1002/9781118810408.ch9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
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Bleek K, Taubert A. New developments in polymer-controlled, bioinspired calcium phosphate mineralization from aqueous solution. Acta Biomater 2013; 9:6283-321. [PMID: 23291492 DOI: 10.1016/j.actbio.2012.12.027] [Citation(s) in RCA: 143] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2012] [Revised: 11/13/2012] [Accepted: 12/21/2012] [Indexed: 11/19/2022]
Abstract
The polymer-controlled and bioinspired precipitation of inorganic minerals from aqueous solution at near-ambient or physiological conditions avoiding high temperatures or organic solvents is a key research area in materials science. Polymer-controlled mineralization has been studied as a model for biomineralization and for the synthesis of (bioinspired and biocompatible) hybrid materials for a virtually unlimited number of applications. Calcium phosphate mineralization is of particular interest for bone and dental repair. Numerous studies have therefore addressed the mineralization of calcium phosphate using a wide variety of low- and high-molecular-weight additives. In spite of the growing interest and increasing number of experimental and theoretical data, the mechanisms of polymer-controlled calcium phosphate mineralization are not entirely clear to date, although the field has made significant progress in the last years. A set of elegant experiments and calculations has shed light on some details of mineral formation, but it is currently not possible to preprogram a mineralization reaction to yield a desired product for a specific application. The current article therefore summarizes and discusses the influence of (macro)molecular entities such as polymers, peptides, proteins and gels on biomimetic calcium phosphate mineralization from aqueous solution. It focuses on strategies to tune the kinetics, morphologies, final dimensions and crystal phases of calcium phosphate, as well as on mechanistic considerations.
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Affiliation(s)
- Katrin Bleek
- Institute of Chemistry, University of Potsdam, D-14476 Potsdam, Germany
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A PLG/HAp composite scaffold for lentivirus delivery. Biomaterials 2013; 34:5431-8. [PMID: 23602363 DOI: 10.1016/j.biomaterials.2013.04.009] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 04/04/2013] [Indexed: 01/08/2023]
Abstract
Gene delivery from tissue engineering scaffolds provides the opportunity to control the microenvironment by inducing expression of regenerative factors. Hydroxyapatite (HAp) nanoparticles can bind lentivirus, and we investigated the incorporation of HAp into poly(lactide-co-glycolide) (PLG) scaffolds in order to retain lentivirus added to the scaffold. PLG/HAp scaffolds loaded with lentivirus enhanced transgene expression over 10-fold in vitro relative to scaffolds without HAp. Following in vivo implantation, PLG/HAp scaffolds promoted transgene expression for more than 100 days, with the level and duration enhanced relative to control scaffolds with lentivirus/HAp complexes added to PLG scaffolds. The extent of HAp incorporated into the scaffold influenced transgene expression, in part through its impact on porous architecture. Expression in vivo was localized to PLG/HAp scaffolds, with macrophages the primary cell type transduced at day 3, yet transduction of neutrophils and dendritic cells was also observed. At day 21 in PLG/HAp scaffolds, non-immune cells were transduced to a greater extent than immune cells, a trend that was opposite results from PLG scaffolds. Thus, in addition to retaining the virus, PLG/HAp influenced cell infiltration and preferentially transduced non-immune cells.
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Saito E, Suarez-Gonzalez D, Rao RR, Stegemann JP, Murphy WL, Hollister SJ. Use of micro-computed tomography to nondestructively characterize biomineral coatings on solid freeform fabricated poly (L-lactic acid) and poly ((ε-caprolactone) scaffolds in vitro and in vivo. Tissue Eng Part C Methods 2013; 19:507-17. [PMID: 23134479 DOI: 10.1089/ten.tec.2012.0495] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Biomineral coatings have been extensively used to enhance the osteoconductivity of polymeric scaffolds. Numerous porous scaffolds have previously been coated with a bone-like apatite mineral through incubation in simulated body fluid (SBF). However, characterization of the mineral layer formed on scaffolds, including the amount of mineral within the scaffolds, often requires destructive methods. We have developed a method using micro-computed tomography (μ-CT) scanning to nondestructively quantify the amount of mineral in vitro and in vivo on biodegradable scaffolds made of poly (L-lactic acid) (PLLA) and poly (ε-caprolactone) (PCL). PLLA and PCL scaffolds were fabricated using an indirect solid freeform fabrication (SFF) technique to achieve orthogonally interconnected pore architectures. Biomineral coatings were formed on the fabricated PLLA and PCL scaffolds after incubation in modified SBF (mSBF). Scanning electron microscopy and X-ray diffraction confirmed the formation of an apatite-like mineral. The scaffolds were implanted into mouse ectopic sites for 3 and 10 weeks. The presence of a biomineral coating within the porous scaffolds was confirmed through plastic embedding and μ-CT techniques. Tissue mineral content (TMC) and volume of mineral on the scaffold surfaces detected by μ-CT had a strong correlation with the amount of calcium measured by the orthocresolphthalein complex-one (OCPC) method before and after implantation. There was a strong correlation between OCPC pre- and postimplantation and μ-CT measured TMC (R(2)=0.96 preimplant; R(2)=0.90 postimplant) and mineral volume (R(2)=0.96 preimplant; R(2)=0.89 postimplant). The μ-CT technique showed increases in mineral following implantation, suggesting that μ-CT can be used to nondestructively determine the amount of calcium on coated scaffolds.
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Affiliation(s)
- Eiji Saito
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA
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Chanchareonsook N, Tideman H, Feinberg SE, Hollister SJ, Jongpaiboonkit L, Kin L, Jansen JA. Subcutaneous tissue response to titanium, poly(ϵ-caprolactone), and carbonate-substituted hydroxyapatite-coated poly(ϵ-caprolactone) plates: A rabbit study. J Biomed Mater Res A 2013; 101:2258-66. [DOI: 10.1002/jbm.a.34542] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2012] [Revised: 11/12/2012] [Accepted: 11/19/2012] [Indexed: 11/06/2022]
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Wei H, Li H, Liu Y, Jin P, Wang X, Li B. Oxidation-resistant acidic resins prepared by partial carbonization as cocatalysts in synthesis of adipic acid. ACS APPLIED MATERIALS & INTERFACES 2012; 4:4106-4112. [PMID: 22775061 DOI: 10.1021/am300863b] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The oxidation-resistant acidic resins are of great importance for the catalytic oxidation systems. In this paper, the oxidatively stable acidic resins are obtained from the cation ion exchange resins (CIERs) through the thermal treatment in N(2) atmosphere. The structure and properties of the thermally treated CIERs were characterized by chemical analysis, Fourier transform infrared (FT-IR) spectra, acid capacity measurement and scanning electron microscope (SEM). The thermally treated CIERs possess high acid capacity up to 4.09 mmol g(-1). A partial carbonization is observed in the thermal treatment process of CIERs, but the morphology of resin spheres maintains well. The as-prepared CIERs are used as solid acids to assist the hydrogen peroxide oxidation of cyclohexene to adipic acid (ADA) with tungstic acid as the catalyst precursor. The improved yields of ADA in the recycling reaction are obtained in the presence of acidic CIERs. Meanwhile, the unproductive decomposition of H(2)O(2) is effectively suppressed. The high yields of ADA (about 81%) are kept by the thermally treated CIERs even after the fifth cycle. The thermally treated CIERs exhibit excellent acid-catalytic performance and possess remarkable oxidation-resistant capability.
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Affiliation(s)
- Huijuan Wei
- Institute of Industrial Catalysis, College of Chemistry and Molecular Engineering, Zhengzhou University, 100 Science Road, Zhengzhou 450001, P R China
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Fujii S, Okada M, Nishimura T, Maeda H, Sugimoto T, Hamasaki H, Furuzono T, Nakamura Y. Hydroxyapatite-armored poly(ε-caprolactone) microspheres and hydroxyapatite microcapsules fabricated via a Pickering emulsion route. J Colloid Interface Sci 2012; 374:1-8. [DOI: 10.1016/j.jcis.2012.01.058] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2011] [Revised: 01/21/2012] [Accepted: 01/21/2012] [Indexed: 10/14/2022]
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Hollister SJ, Murphy WL. Scaffold translation: barriers between concept and clinic. TISSUE ENGINEERING. PART B, REVIEWS 2011; 17:459-74. [PMID: 21902613 PMCID: PMC3223015 DOI: 10.1089/ten.teb.2011.0251] [Citation(s) in RCA: 129] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 07/26/2011] [Indexed: 01/29/2023]
Abstract
Translation of scaffold-based bone tissue engineering (BTE) therapies to clinical use remains, bluntly, a failure. This dearth of translated tissue engineering therapies (including scaffolds) remains despite 25 years of research, research funding totaling hundreds of millions of dollars, over 12,000 papers on BTE and over 2000 papers on BTE scaffolds alone in the past 10 years (PubMed search). Enabling scaffold translation requires first an understanding of the challenges, and second, addressing the complete range of these challenges. There are the obvious technical challenges of designing, manufacturing, and functionalizing scaffolds to fill the Form, Fixation, Function, and Formation needs of bone defect repair. However, these technical solutions should be targeted to specific clinical indications (e.g., mandibular defects, spine fusion, long bone defects, etc.). Further, technical solutions should also address business challenges, including the need to obtain regulatory approval, meet specific market needs, and obtain private investment to develop products, again for specific clinical indications. Finally, these business and technical challenges present a much different model than the typical research paradigm, presenting the field with philosophical challenges in terms of publishing and funding priorities that should be addressed as well. In this article, we review in detail the technical, business, and philosophical barriers of translating scaffolds from Concept to Clinic. We argue that envisioning and engineering scaffolds as modular systems with a sliding scale of complexity offers the best path to addressing these translational challenges.
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Affiliation(s)
- Scott J Hollister
- Scaffold Tissue Engineering Group, Department of Biomedical Engineering, The University of Michigan, Ann Arbor, Michigan 48109, USA.
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Suárez-González D, Barnhart K, Migneco F, Flanagan C, Hollister SJ, Murphy WL. Controllable mineral coatings on PCL scaffolds as carriers for growth factor release. Biomaterials 2011; 33:713-21. [PMID: 22014948 DOI: 10.1016/j.biomaterials.2011.09.095] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 09/29/2011] [Indexed: 01/20/2023]
Abstract
In this study, we have developed mineral coatings on polycaprolactone scaffolds to serve as templates for growth factor binding and release. Mineral coatings were formed using a biomimetic approach that consisted in the incubation of scaffolds in modified simulated body fluids (mSBF). To modulate the properties of the mineral coating, which we hypothesized would dictate growth factor release, we used carbonate (HCO(3)) concentration in mSBF of 4.2 mm, 25 mm, and 100 mm. Analysis of the mineral coatings formed using scanning electron microscopy indicated growth of a continuous layer of mineral with different morphologies. X-ray diffraction analysis showed peaks associated with hydroxyapatite, the major inorganic constituent of human bone tissue in coatings formed in all HCO(3) concentrations. Mineral coatings with increased HCO(3) substitution showed more rapid dissolution kinetics in an environment deficient in calcium and phosphate but showed re-precipitation in an environment with the aforementioned ions. The mineral coating provided an effective mechanism for growth factor binding and release. Peptide versions of vascular endothelial growth factor (VEGF) and bone morphogenetic protein 2 (BMP2) were bound with efficiencies up to 90% to mineral mineral-coated PCL scaffolds. We also demonstrated sustained release of all growth factors with release kinetics that were strongly dependent in the solubility of the mineral coating.
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Lee JS, Suarez-Gonzalez D, Murphy WL. Mineral coatings for temporally controlled delivery of multiple proteins. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2011; 23:4279-84. [PMID: 22039597 PMCID: PMC4056254 DOI: 10.1002/adma.201100060] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Affiliation(s)
- Jae Sung Lee
- Department of Biomedical Engineering, University of Wisconsin, 1550 Engineering Drive, Madison, WI 53706 (USA)
| | - Darilis Suarez-Gonzalez
- Materials Science Program, University of Wisconsin, 1509 University Avenue, Madison, WI 53706 (USA)
| | - William L. Murphy
- Department of Biomedical Engineering, University of Wisconsin, 1550 Engineering Drive, Madison, WI 53706 (USA)
- Department of Orthopedics and Rehabilitation, University of Wisconsin, 600 Highland Avenue, Madison, WI 53792 (USA)
- Department of Pharmacology, University of Wisconsin, 1300 University Avenue, Madison, WI 53706 (USA)
- Collaborative Research Center, AO Foundation
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Lee JS, Lu Y, Baer GS, Markel MD, Murphy WL. Controllable protein delivery from coated surgical sutures. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01389g] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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