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Beenken KE, Campbell MJ, Ramirez AM, Alghazali K, Walker CM, Jackson B, Griffin C, King W, Bourdo SE, Rifkin R, Hecht S, Meeker DG, Anderson DE, Biris AS, Smeltzer MS. Evaluation of a bone filler scaffold for local antibiotic delivery to prevent Staphylococcus aureus infection in a contaminated bone defect. Sci Rep 2021; 11:10254. [PMID: 33986462 PMCID: PMC8119729 DOI: 10.1038/s41598-021-89830-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Accepted: 04/30/2021] [Indexed: 12/30/2022] Open
Abstract
We previously reported the development of an osteogenic bone filler scaffold consisting of degradable polyurethane, hydroxyapatite, and decellularized bovine bone particles. The current study was aimed at evaluating the use of this scaffold as a means of local antibiotic delivery to prevent infection in a bone defect contaminated with Staphylococcus aureus. We evaluated two scaffold formulations with the same component ratios but differing overall porosity and surface area. Studies with vancomycin, daptomycin, and gentamicin confirmed that antibiotic uptake was concentration dependent and that increased porosity correlated with increased uptake and prolonged antibiotic release. We also demonstrate that vancomycin can be passively loaded into either formulation in sufficient concentration to prevent infection in a rabbit model of a contaminated segmental bone defect. Moreover, even in those few cases in which complete eradication was not achieved, the number of viable bacteria in the bone was significantly reduced by treatment and there was no radiographic evidence of osteomyelitis. Radiographs and microcomputed tomography (µCT) analysis from the in vivo studies also suggested that the addition of vancomycin did not have any significant effect on the scaffold itself. These results demonstrate the potential utility of our bone regeneration scaffold for local antibiotic delivery to prevent infection in contaminated bone defects.
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Affiliation(s)
- Karen E Beenken
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Mara J Campbell
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Aura M Ramirez
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Karrar Alghazali
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Christopher M Walker
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - Bailey Jackson
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Christopher Griffin
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - William King
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Shawn E Bourdo
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, USA
| | - Rebecca Rifkin
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, USA
| | - Silke Hecht
- Department of Small Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, USA
| | - Daniel G Meeker
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA
| | - David E Anderson
- Department of Large Animal Clinical Sciences, University of Tennessee College of Veterinary Medicine, Knoxville, TN, USA
| | - Alexandru S Biris
- Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, USA.
| | - Mark S Smeltzer
- Department of Microbiology and Immunology, University of Arkansas for Medical Sciences, Little Rock, AR, USA.
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Local delivery of adenosine receptor agonists to promote bone regeneration and defect healing. Adv Drug Deliv Rev 2019; 146:240-247. [PMID: 29913176 DOI: 10.1016/j.addr.2018.06.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 05/08/2018] [Accepted: 06/12/2018] [Indexed: 01/07/2023]
Abstract
Adenosine receptor activation has been investigated as a potential therapeutic approach to heal bone. Bone has enhanced regenerative potential when influenced by either direct or indirect adenosine receptor agonism. As investigators continue to elucidate how adenosine influences bone cell homeostasis at the cellular and molecular levels, a small but growing body of literature has reported successful in vivo applications of adenosine delivery. This review summarizes the role adenosine receptor ligation plays in osteoblast and osteoclast biology and remodeling/regeneration. It also reports on all the modalities described in the literature at this point for delivery of adenosine through in vivo models for bone healing and regeneration.
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Alghazali KM, Newby SD, Nima ZA, Hamzah RN, Watanabe F, Bourdo SE, Masi TJ, Stephenson SM, Anderson DE, Dhar MS, Biris AS. Functionalized gold nanorod nanocomposite system to modulate differentiation of human mesenchymal stem cells into neural-like progenitors. Sci Rep 2017; 7:16654. [PMID: 29192282 PMCID: PMC5709514 DOI: 10.1038/s41598-017-16800-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Accepted: 11/13/2017] [Indexed: 01/09/2023] Open
Abstract
A 2D multifunctional nanocomposite system of gold nanorods (AuNRs) was developed. Gold nanorods were functionalized via polyethylene glycol with a terminal amine, and, were characterized using transmission and scanning electron microscopy, ultra violet-visible and X-ray photoelectron spectroscopy, and Zeta-potential. The system was cytocompatible to and maintained the integrity of Schwann cells. The neurogenic potential of adipose tissue - derived human mesenchymal stem cells (hMSCs) was evaluated in vitro. The expression pattern and localization of Vimentin confirmed the mesenchymal origin of cells and tracked morphological changes during differentiation. The expression patterns of S100β and glial fibrillary acidic protein (GFAP), were used as indicator for neural differentiation. Results suggested that this process was enhanced when the cells were seeded on the AuNRs compared to the tissue-culture surface. The present study indicates that the design and the surface properties of the AuNRs enhances neural differentiation of hMSCs and hence, would be beneficial for neural tissue engineering scaffolds.
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Affiliation(s)
- Karrer M Alghazali
- Center of Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, 72204, USA
| | - Steven D Newby
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, 37996, USA
| | - Zeid A Nima
- Center of Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, 72204, USA
| | - Rabab N Hamzah
- Center of Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, 72204, USA
| | - Fumiya Watanabe
- Center of Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, 72204, USA
| | - Shawn E Bourdo
- Center of Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, 72204, USA
| | - Thomas J Masi
- University of Tennessee Graduate School of Medicine, Knoxville, TN, 37996, USA
| | - Stacy M Stephenson
- University of Tennessee Graduate School of Medicine, Knoxville, TN, 37996, USA
| | - David E Anderson
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, 37996, USA
| | - Madhu S Dhar
- College of Veterinary Medicine, University of Tennessee, Knoxville, TN, 37996, USA.
| | - Alexandru S Biris
- Center of Integrative Nanotechnology Sciences, University of Arkansas at Little Rock, Little Rock, AR, 72204, USA.
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Pobloth AM, Johnson KA, Schell H, Kolarczik N, Wulsten D, Duda GN, Schmidt-Bleek K. Establishment of a preclinical ovine screening model for the investigation of bone tissue engineering strategies in cancellous and cortical bone defects. BMC Musculoskelet Disord 2016; 17:111. [PMID: 26932531 PMCID: PMC4774005 DOI: 10.1186/s12891-016-0964-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Accepted: 02/24/2016] [Indexed: 12/18/2022] Open
Abstract
Background New tissue engineering strategies for bone regeneration need to be investigated in a relevant preclinical large animal model before making the translation into human patients. Therefore, our interdisciplinary group established a simplified large animal screening model for intramembranous bone defect regeneration in cancellous and cortical bone. Methods Related to a well-established model of cancellous drill hole defect regeneration in sheep, both the proximal and distal epimetaphyseal regions of the femur and the humerus were used bilaterally for eight drill hole cancellous defects (Ø 6 mm, 15 mm depth). Several improvements of the surgical procedure and equipment for an easier harvest of samples were invented. For the inclusion of cortical defect regeneration, a total of eight unicortical diaphyseal drill holes (6 mm Ø) were placed in the proximal-lateral and distal-medial parts of the metacarpal (MC) and metatarsal (MT) diaphyseal bone bilaterally. Acting moments within a normal gait cycle in the musculoskeletal lower limb model were compared with the results of the biomechanical in vitro torsion test until failure to ensure a low accidental fracture risk of utilized bones (ANOVA, p < 0.05). The model was tested in vivo, using thirteen adult, female, black-face sheep (Ø 66 kg; ± 5 kg; age ≥ 2.5 years). In a two-step surgical procedure 16 drill holes were performed for the investigation of two different time points within one animal. Defects were left empty, augmented with autologous cancellous bone or soft bone graft substitutes. Results The in vitro tests confirmed this model a high comparability between drilled MC and MT bones and a high safety margin until fracture. The exclusion of one animal from the in vivo study, due to a spiral fracture of the left MC bone led to a tolerable failure rate of 8 %. Conclusions As a screening tool, promising biomaterials can be tested in this cancellous and cortical bone defect model prior to the application in a more complex treatment site.
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Affiliation(s)
- Anne-Marie Pobloth
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.
| | - Kenneth A Johnson
- Faculty of Veterinary Science, University of Sydney, Sydney, 2006, NSW, Australia.
| | - Hanna Schell
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.
| | - Nicolai Kolarczik
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.
| | - Dag Wulsten
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.,Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany
| | - Georg N Duda
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany. .,Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.
| | - Katharina Schmidt-Bleek
- Julius Wolff Institute and Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany. .,Berlin-Brandenburg Center for Regenerative Therapies, Charité - Universitätsmedizin Berlin, Augustenburger Platz 1, D-13353, Berlin, Germany.
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Alghazali KM, Nima ZA, Hamzah RN, Dhar MS, Anderson DE, Biris AS. Bone-tissue engineering: complex tunable structural and biological responses to injury, drug delivery, and cell-based therapies. Drug Metab Rev 2015; 47:431-54. [PMID: 26651522 DOI: 10.3109/03602532.2015.1115871] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Bone loss and failure of proper bone healing continues to be a significant medical condition in need of solutions that can be implemented successfully both in human and veterinary medicine. This is particularly true when large segmental defects are present, the bone has failed to return to normal form or function, or the healing process is extremely prolonged. Given the inherent complexity of bone tissue - its unique structural, mechanical, and compositional properties, as well as its ability to support various cells - it is difficult to find ideal candidate materials that could be used as the foundation for tissue regeneration from technological platforms. Recently, important developments have been made in the implementation of complex structures built both at the macro- and the nano-level that have been shown to positively impact bone formation and to have the ability to deliver active biological molecules (drugs, growth factors, proteins, cells) for controlled tissue regeneration and the prevention of infection. These materials are diverse, ranging from polymers to ceramics and various composites. This review presents developments in this area with a focus on the role of scaffold structure and chemistry on the biologic processes that influence bone physiology and regeneration.
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Affiliation(s)
- Karrer M Alghazali
- a Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock , Little Rock , AR , USA and
| | - Zeid A Nima
- a Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock , Little Rock , AR , USA and
| | - Rabab N Hamzah
- a Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock , Little Rock , AR , USA and
| | - Madhu S Dhar
- b Tissue Regeneration Laboratory, Department of Large Animal Sciences, College of Veterinary Medicine, University of Tennessee , Knoxville , TN , USA
| | - David E Anderson
- b Tissue Regeneration Laboratory, Department of Large Animal Sciences, College of Veterinary Medicine, University of Tennessee , Knoxville , TN , USA
| | - Alexandru S Biris
- a Center for Integrative Nanotechnology Sciences, University of Arkansas at Little Rock , Little Rock , AR , USA and
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