1
|
Zegre M, Poljańska E, Caetano LA, Gonçalves L, Bettencourt A. Research progress on biodegradable polymeric platforms for targeting antibiotics to the bone. Int J Pharm 2023; 648:123584. [PMID: 37940080 DOI: 10.1016/j.ijpharm.2023.123584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 10/23/2023] [Accepted: 11/05/2023] [Indexed: 11/10/2023]
Abstract
The treatment of bone infections still involves systemic or local antibiotic therapy in high doses for prolonged periods. Current research focuses on the application of different drug delivery systems to the bone, aiming at a targeted local administration that will decrease the number of drugs used and their toxicity, compared to the systemic route. The gold standard in clinical practice is currently poly(methyl methacrylate) (PMMA) cement. The main drawback of PMMA, however, is that it is non-biodegradable, requiring a second follow-up surgery to remove the implant. Biodegradable delivery systems, on the other hand, are easily resorbable within the organism, and less invasive alternative with better patient compliance. Among biodegradable materials, natural and synthetic polymers are being studied as local drug delivery systems due to their excellent biocompatibility, sustained effect, and antibiotic release with high penetrability to infected bone and soft tissue. In this review, we focus on biodegradable polymeric platforms, such as micro- and nanoparticles, scaffolds, and hydrogels, as well as multi-delivery systems for targeting antibiotics to the bone. Additionally, we discuss the reported drug release profiles that provide important information about the systems' functionality.
Collapse
Affiliation(s)
- M Zegre
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; H&TRC - Centro de Investigação em Saúde e Tecnologia, ESTeSL - Escola Superior de Tecnologia da Saúde de Lisboa, IPL - Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
| | - E Poljańska
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; Laboratory Medicine, Faculty of Pharmacy, Jagiellonian University Medical College, 30-688 Krakow, Poland
| | - L A Caetano
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal; H&TRC - Centro de Investigação em Saúde e Tecnologia, ESTeSL - Escola Superior de Tecnologia da Saúde de Lisboa, IPL - Instituto Politécnico de Lisboa, Av. D. João II, Lote 4.69.01, 1990-096 Lisboa, Portugal
| | - L Gonçalves
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal
| | - A Bettencourt
- Research Institute for Medicines (iMed.ULisboa), Faculdade de Farmácia, Universidade de Lisboa, Av. Prof. Gama Pinto, 1649-003 Lisboa, Portugal.
| |
Collapse
|
2
|
Jurić Simčić A, Abrami M, Erak I, Paladin I, Cetina Čižmek B, Hafner A, Grassi M, Filipović-Grčić J. Use of low-field NMR and rheology to evaluate the microstructure and stability of a poly(d,l-lactide-co-glycolide)-based W/O emulsion to be processed by spray drying. Int J Pharm 2023; 631:122471. [PMID: 36509222 DOI: 10.1016/j.ijpharm.2022.122471] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 12/01/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022]
Abstract
Drug-loaded emulsions for spray drying should be optimised for their rheological behaviour and stability under operating conditions, as this is essential for achieving the desired physicochemical properties of the final dry product. Our aim was therefore to investigate the structure and stability of a water-in-oil (W/O) emulsion containing vancomycin hydrochloride as the active ingredient in the aqueous phase, poly(d,l-lactide-co-glycolide) as the structural polymer in the dichloromethane-based organic phase, and various stabilisers using low-field nuclear magnetic resonance (LF NMR) and rheological characterisation. Four emulsions were tested, namely-one without stabiliser, one with Poloxamer® 407, one with chitosan and Span™ 80 and one with chitosan only. The theoretical interpretation of the rheological data allowed the determination of the velocity and the shear rate/stress profiles inside the feed path of the W/O emulsion, aspects that are critical for the industrial scale-up of the emulsion drying process. In addition, LF NMR demonstrated that shaking was sufficient to restore the original emulsion structure and that the droplet size of all emulsions was in the range of 1-10 μm, although the emulsion with chitosan had the narrowest droplet size distribution and the higher zero shear viscosity, which accounts for the increased long-term stability due to impeded droplets movement.
Collapse
Affiliation(s)
- Ana Jurić Simčić
- R&D, PLIVA Croatia Ltd, TEVA Group Member, Prilaz baruna Filipovića 25, 10000 Zagreb, Croatia.
| | - Michela Abrami
- Department of Engineering and Architecture, Trieste University, via Valerio 6, I-34127 Trieste, Italy.
| | - Iva Erak
- R&D, PLIVA Croatia Ltd, TEVA Group Member, Prilaz baruna Filipovića 25, 10000 Zagreb, Croatia.
| | - Iva Paladin
- R&D, PLIVA Croatia Ltd, TEVA Group Member, Prilaz baruna Filipovića 25, 10000 Zagreb, Croatia.
| | - Biserka Cetina Čižmek
- R&D, PLIVA Croatia Ltd, TEVA Group Member, Prilaz baruna Filipovića 25, 10000 Zagreb, Croatia.
| | - Anita Hafner
- University of Zagreb, Faculty of Pharmacy and Biochemistry, A. Kovačića 1, 10000 Zagreb, Croatia.
| | - Mario Grassi
- Department of Engineering and Architecture, Trieste University, via Valerio 6, I-34127 Trieste, Italy.
| | - Jelena Filipović-Grčić
- University of Zagreb, Faculty of Pharmacy and Biochemistry, A. Kovačića 1, 10000 Zagreb, Croatia.
| |
Collapse
|
3
|
Thermosensitive hybrid hydrogels for the controlled release of bioactive vancomycin in the treatment of orthopaedic implant infections. Eur J Pharm Biopharm 2019; 142:322-333. [PMID: 31295503 DOI: 10.1016/j.ejpb.2019.07.006] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 07/05/2019] [Accepted: 07/05/2019] [Indexed: 01/02/2023]
Abstract
The purpose of this work was the development of antibacterial delivery systems for vancomycin, with potential application in the prevention or treatment of orthopedic implant infections. Previous studies have shown tandem thermal gelling and Michael addition cross-linking of hydrogels based on methacrylate, acrylate or vinylsulfone triblock copolymers of PEG-p(HPMAm-lac1-2) and thiolated hyaluronic acid. In this work we exploited these α-β unsaturated derivatives of PEG-p(HPMAm-lac1-2) triblock copolymers and used them in combination with thiolated hyaluronic acid as controlled delivery systems for vancomycin. It was found that the antibiotic was sustainably released from the hydrogel networks for at least 5 days with release kinetics depending on diffusion and dissociation of the positively charged vancomycin from the negatively charged hyaluronic acid. The release of vancomycin could be tailored mainly by HA-SH solid content and degree of thiolation. The developed hydrogels were demonstrate efficacious in preserving the structural and functional integrity of the encapsulated drug by physical immobilization within the gel network and ionic interaction with hyaluronic acid, thereby preventing vancomycin deamidation processes. Furthermore, the antimicrobial activity of vancomycin loaded hydrogels was assessed, demonstrating retention of inhibitory activity towards Staphylococcus aureus during formulation and release, with slightly increased activity of vancomycin encapsulated in hydrogels of higher HA-SH content as compared to controls.
Collapse
|
4
|
Casalini T, Rossi F, Brizielli L, Perale G. Theoretical Investigation of Design Space for Multi Layer Drug Eluting Bioresorbable Suture Threads. Curr Pharm Biotechnol 2019; 20:332-345. [DOI: 10.2174/1389201020666190206200411] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 08/28/2018] [Accepted: 01/13/2019] [Indexed: 11/22/2022]
Abstract
Background:
The work presented here is focused on the development of a comprehensive
theoretical model for the description of drug release from a double - layer bioresorbable suture thread
and the therapeutic efficacy of the active compounds delivered in the surrounding tissue.
Methods:
In particular, the system under investigation is composed of a core of slow-degrading polylactic-
acid-co-ε-caprolactone (PLCL), where an antibiotic compound (Vancomycin) is loaded, surrounded
by a shell of a fast-degrading polylactic-co-glycolic acid (PLGA) which contains an anesthetic
drug (Lidocaine hydrochloride) for the post-surgical pain relief.
Results:
This system is of potential interest for the combined effects provided by the different active
molecules, but the different release and polymer degradation dynamics, as well as their mutual influence,
do not allow an intuitive a priori evaluation of device behavior, which can be rationalized
through mathematical modeling. The model takes into account the main involved phenomena (polymer
degradation and diffusion of the drugs within the device and the tissue, where they are metabolized)
and their synergic effects on the overall system behavior.
Conclusion:
Model results are discussed in order to quantify the impact of the main design parameters on
device performances, thanks to the use of phase diagrams (which show drug effect in time and space)
whose insights are summarized in order to determine a design space according to the specific needs.
Collapse
Affiliation(s)
- Tommaso Casalini
- Institute of Mechanical Engineering and Material Engineering, Department of Innovative Technologies, SUPSI, 6928 Manno, Switzerland
| | - Filippo Rossi
- Department of Chemistry, Materials and Chemical Engineering , Italy
| | - Luisa Brizielli
- Institute of Mechanical Engineering and Material Engineering, Department of Innovative Technologies, SUPSI, 6928 Manno, Switzerland
| | - Giuseppe Perale
- Institute of Mechanical Engineering and Material Engineering, Department of Innovative Technologies, SUPSI, 6928 Manno, Switzerland
| |
Collapse
|
5
|
Nandi SK, Shivaram A, Bose S, Bandyopadhyay A. Silver nanoparticle deposited implants to treat osteomyelitis. J Biomed Mater Res B Appl Biomater 2018; 106:1073-1083. [PMID: 28508595 PMCID: PMC5685947 DOI: 10.1002/jbm.b.33910] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 04/18/2017] [Accepted: 04/22/2017] [Indexed: 01/11/2023]
Abstract
In this study, electrolytically deposited strongly adherent silver nanoparticles on stainless-steel (SS) implants were used for in situ osteomyelitis treatment. Samples were heat treated to enhance adhesion of silver on 316 L SS. Ex vivo studies were performed to measure silver-release profiles from the 316 L SS screws inserted in equine cadaver bones. No change in the release profiles of silver ions were observed in vitro between the implanted screws and the control. In vivo studies were performed using osteomyelitic rabbit model with 3 mm diameter silver-deposited 316 L SS pins at two different doses of silver: high and low. Infection control ability of the pins for treating osteomyelitis in a rabbit model was measured using bacteriologic, radiographic, histological, and scanning electron microscopic studies. Silver-coated pins, especially high dose, offered a promising result to treat infection in animal osteomyelitis model without any toxicity to major organs. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1073-1083, 2018.
Collapse
Affiliation(s)
- Samit Kumar Nandi
- Department of Veterinary Surgery and Radiology, West Bengal University of Animal and Fishery Sciences, Kolkata, 700037, India
| | - Anish Shivaram
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920, USA
| | - Susmita Bose
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920, USA
| | - Amit Bandyopadhyay
- W. M. Keck Biomedical Materials Research Laboratory, School of Mechanical and Materials Engineering, Washington State University, Pullman, Washington, 99164-2920, USA
| |
Collapse
|
6
|
Nandi SK, Bandyopadhyay S, Das P, Samanta I, Mukherjee P, Roy S, Kundu B. Understanding osteomyelitis and its treatment through local drug delivery system. Biotechnol Adv 2016; 34:1305-1317. [DOI: 10.1016/j.biotechadv.2016.09.005] [Citation(s) in RCA: 84] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Revised: 09/12/2016] [Accepted: 09/27/2016] [Indexed: 02/08/2023]
|
7
|
Sezer AD, Kazak Sarılmışer H, Rayaman E, Çevikbaş A, Öner ET, Akbuğa J. Development and characterization of vancomycin-loaded levan-based microparticular system for drug delivery. Pharm Dev Technol 2015; 22:627-634. [DOI: 10.3109/10837450.2015.1116564] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Ali Demir Sezer
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Marmara University, Haydarpaşa, Istanbul, Turkey,
| | - Hande Kazak Sarılmışer
- Department of Bioengineering, Faculty of Engineering, Marmara University, Göztepe, Istanbul, Turkey, and
| | - Erkan Rayaman
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Marmara University, Haydarpaşa, Istanbul, Turkey
| | - Adile Çevikbaş
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Marmara University, Haydarpaşa, Istanbul, Turkey
| | - Ebru Toksoy Öner
- Department of Bioengineering, Faculty of Engineering, Marmara University, Göztepe, Istanbul, Turkey, and
| | - Jülide Akbuğa
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, Marmara University, Haydarpaşa, Istanbul, Turkey,
| |
Collapse
|
8
|
Does implant coating with antibacterial-loaded hydrogel reduce bacterial colonization and biofilm formation in vitro? Clin Orthop Relat Res 2014; 472:3311-23. [PMID: 24622801 PMCID: PMC4182393 DOI: 10.1007/s11999-014-3558-1] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
BACKGROUND Implant-related infections represent one of the most severe complications in orthopaedics. A fast-resorbable, antibacterial-loaded hydrogel may reduce or prevent bacterial colonization and biofilm formation of implanted biomaterials. QUESTIONS/PURPOSES We asked: (1) Is a fast-resorbable hydrogel able to deliver antibacterial compounds in vitro? (2) Can a hydrogel (alone or antibacterial-loaded) coating on implants reduce bacterial colonization? And (3) is intraoperative coating feasible and resistant to press-fit implant insertion? METHODS We tested the ability of Disposable Antibacterial Coating (DAC) hydrogel (Novagenit Srl, Mezzolombardo, Italy) to deliver antibacterial agents using spectrophotometry and a microbiologic assay. Antibacterial and antibiofilm activity were determined by broth microdilution and a crystal violet assay, respectively. Coating resistance to press-fit insertion was tested in rabbit tibias and human femurs. RESULTS Complete release of all tested antibacterial compounds was observed in less than 96 hours. Bactericidal and antibiofilm effect of DAC hydrogel in combination with various antibacterials was shown in vitro. Approximately 80% of the hydrogel coating was retrieved on the implant after press-fit insertion. CONCLUSIONS Implant coating with an antibacterial-loaded hydrogel reduces bacterial colonization and biofilm formation in vitro. CLINICAL RELEVANCE A fast-resorbable, antibacterial-loaded hydrogel coating may help prevent implant-related infections in orthopaedics. However, further validation in animal models and properly controlled human studies is required.
Collapse
|
9
|
Kaur S, Harjai K, Chhibber S. Bacteriophage mediated killing of Staphylococcus aureus in vitro on orthopaedic K wires in presence of linezolid prevents implant colonization. PLoS One 2014; 9:e90411. [PMID: 24594764 PMCID: PMC3940871 DOI: 10.1371/journal.pone.0090411] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 01/27/2014] [Indexed: 01/21/2023] Open
Abstract
Background Infections of bone and joint tissues following arthroplasty surgeries remain a major challenge in orthopaedic settings. Methicillin resistant Staphylococcus aureus (MRSA) is recognised as an established pathogen in such infections. Combination therapy using linezolid and bacteriophage impregnated in biopolymer was investigated in the present study as an alternative strategy to prevent MRSA colonisation on the orthopaedic implant surface. Methodology Coating of stainless steel orthopaedic grade K-wires was achieved using hydroxypropylmethlycellulose (HPMC) mixed with phage alone, linezolid alone and phage and linezolid together. The potential of these agents to inhibit adhesion of S.aureus (MRSA) 43300 on K-wires was assessed. Coated and naked wires were analysed by scanning electron microscopy (SEM) and fluorescent staining. Result Significant reduction in bacterial adhesion was achieved on phage/linezolid wires in comparison to naked as well as HPMC coated wires. However, maximum reduction in bacterial adherence (∼4 log cycles) was observed on the wires coated with phage-linezolid combination. The frequency of emergence of resistant mutants was also negligible in presence of both the agents. Conclusion This study provides evidence to confirm that local delivery system employing linezolid (a potent protein synthesis inhibitor) along with a broad spectrum lytic bacteriophage (capable of self-multiplication) is able to attack the adhered as well as surrounding bacteria present near the implant site. Unlike other antibiotic based therapies, this combination has the potential to significantly restrict the emergence of resistant mutants, thus paving the way for effective treatment of MRSA associated infection of medical implants.
Collapse
Affiliation(s)
- Sandeep Kaur
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Kusum Harjai
- Department of Microbiology, Panjab University, Chandigarh, India
| | - Sanjay Chhibber
- Department of Microbiology, Panjab University, Chandigarh, India
- * E-mail:
| |
Collapse
|
10
|
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.
Collapse
Affiliation(s)
- Kelsen Bastari
- School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore, 639798, Singapore
| | | | | | | | | | | | | | | | | |
Collapse
|
11
|
D'Mello SR, Yoo J, Bowden NB, Salem AK. Microparticles prepared from sulfenamide-based polymers. J Microencapsul 2013; 31:137-46. [PMID: 23862723 DOI: 10.3109/02652048.2013.814728] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Polysulfenamides (PSN), with a SN linkage (RSNR2) along the polymer backbone, are a new class of biodegradable and biocompatible polymers. These polymers were unknown prior to 2012 when their synthesis and medicinally relevant properties were reported. The aim of this study was to develop microparticles as a controlled drug delivery system using polysulfenamide as the matrix material. The microparticles were prepared by a water-in-oil-in-water double-emulsion solvent-evaporation method. For producing drug-loaded particles, FITC-dextran was used as a model hydrophilic compound. At the optimal formulation conditions, the external morphology of the PSN microparticles was examined by scanning electron microscopy to show the formation of smooth-surfaced spherical particles with low polydispersity. The microparticles had a net negative surface charge (-23 mV) as analyzed by the zetasizer. The drug encapsulation efficiency of the particles and the drug loading were found to be dependent on the drug molecular weight, amount of FITC-dextran used in fabricating FITC-dextran-loaded microparticles, concentration of PSN and surfactant, and volume of the internal and external water phases. FITC-dextran was found to be distributed throughout the PSN microparticles and was released in an initial burst followed by more continuous release over time. Confocal laser scanning microscopy was used to qualitatively observe the cellular uptake of PSN microparticles and indicated localization of the particles in both the cytoplasm and the nucleus.
Collapse
Affiliation(s)
- Sheetal R D'Mello
- Department of Pharmaceutical Sciences & Experimental Therapeutics, College of Pharmacy, University of Iowa , Iowa City, IA , USA and
| | | | | | | |
Collapse
|
12
|
Hickok NJ, Shapiro IM. Immobilized antibiotics to prevent orthopaedic implant infections. Adv Drug Deliv Rev 2012; 64:1165-76. [PMID: 22512927 DOI: 10.1016/j.addr.2012.03.015] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2011] [Revised: 03/08/2012] [Accepted: 03/20/2012] [Indexed: 12/17/2022]
Abstract
Many surgical procedures require the placement of an inert or tissue-derived implant deep within the body cavity. While the majority of these implants do not become colonized by bacteria, a small percentage develops a biofilm layer that harbors invasive microorganisms. In orthopaedic surgery, unresolved periprosthetic infections can lead to implant loosening, arthrodeses, amputations and sometimes death. The focus of this review is to describe development of an implant in which an antibiotic tethered to the metal surface is used to prevent bacterial colonization and biofilm formation. Building on well-established chemical syntheses, studies show that antibiotics can be linked to titanium through a self-assembled monolayer of siloxy amines. The stable metal-antibiotic construct resists bacterial colonization and biofilm formation while remaining amenable to osteoblastic cell adhesion and maturation. In an animal model, the antibiotic modified implant resists challenges by bacteria that are commonly present in periprosthetic infections. While the long-term efficacy and stability is still to be established, ongoing studies support the view that this novel type of bioactive surface has a real potential to mitigate or prevent the devastating consequences of orthopaedic infection.
Collapse
|
13
|
Andreas K, Zehbe R, Kazubek M, Grzeschik K, Sternberg N, Bäumler H, Schubert H, Sittinger M, Ringe J. Biodegradable insulin-loaded PLGA microspheres fabricated by three different emulsification techniques: investigation for cartilage tissue engineering. Acta Biomater 2011; 7:1485-95. [PMID: 21168535 DOI: 10.1016/j.actbio.2010.12.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2010] [Revised: 11/17/2010] [Accepted: 12/13/2010] [Indexed: 01/02/2023]
Abstract
Growth, differentiation and migration factors facilitate the engineering of tissues but need to be administered with defined gradients over a prolonged period of time. In this study insulin as a growth factor for cartilage tissue engineering and a biodegradable PLGA delivery device were used. The aim was to investigate comparatively three different microencapsulation techniques, solid-in-oil-in-water (s/o/w), water-in-oil-in-water (w/o/w) and oil-in-oil-in-water (o/o/w), for the fabrication of insulin-loaded PLGA microspheres with regard to protein loading efficiency, release and degradation kinetics, biological activity of the released protein and phagocytosis of the microspheres. Insulin-loaded PLGA microspheres prepared by all three emulsification techniques had smooth and spherical surfaces with a negative zeta potential. The preparation technique did not affect particle degradation nor induce phagocytosis by human leukocytes. The delivery of structurally intact and biologically active insulin from the microspheres was shown using circular dichroism spectroscopy and a MCF7 cell-based proliferation assay. However, the insulin loading efficiency (w/o/w about 80%, s/o/w 60%, and o/o/w 25%) and the insulin release kinetics were influenced by the microencapsulation technique. The results demonstrate that the w/o/w microspheres are most appropriate, providing a high encapsulation efficiency and low initial burst release, and thus these were finally used for cartilage tissue engineering. Insulin released from w/o/w PLGA microspheres stimulated the formation of cartilage considerably in chondrocyte high density pellet cultures, as determined by increased secretion of proteoglycans and collagen type II. Our results should encourage further studies applying protein-loaded PLGA microspheres in combination with cell transplants or cell-free in situ tissue engineering implants to regenerate cartilage.
Collapse
Affiliation(s)
- Kristin Andreas
- Berlin-Brandenburg Center for Regenerative Therapies, Department of Rheumatology and Clinical Immunology, Charité-Universitätsmedizin Berlin, Berlin, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Billon-Chabaud A, Gouyette A, Merle C, Bouler JM. Development of bisphosphonates controlled delivery systems for bone implantation: influence of the formulation and process used on in vitro release. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2010; 21:1599-1604. [PMID: 20177742 DOI: 10.1007/s10856-010-4012-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/05/2009] [Accepted: 01/27/2010] [Indexed: 05/28/2023]
Abstract
The present study investigates the development of controlled drug delivery devices by association of bisphosphonates (BPs) with calcium-deficient apatite (CDA) to obtain a prolonged drug delivery. In a first part, we studied the microencapsulation of methylene bisphosphonic acid, our model of BPs, in biodegradable PLGA by the double emulsion (w/o/w) solvent evaporation/extraction process. Secondly, we associated BPs, either in a free form or microencapsulated, with calcium phosphate biomaterials. The association of free BPs with CDA was performed by isostatic compression at 80 MPa and we tested the interest of adding a binder, HPMC, in the formulation to reinforce the association. In parallel, microparticles were associated with calcium-deficient apatite, either by simple mixture or by isostatic compression. To compare the different formulations, in vitro dissolution studies were performed. All the formulations tested appear to be efficient to produce BPs loaded biomaterials able to deliver the drug slowly and at a constant rate. The slowest release rate (2.7% in 14 days) was obtained with the blend of microencapsulated BPs with CDA.
Collapse
Affiliation(s)
- A Billon-Chabaud
- INSERM, U 791, Laboratoire d'ingénierie ostéo-articulaire et dentaire, LIOAD, Université de Nantes, 1 Place Alexis Ricordeau, 44042, Nantes, France.
| | | | | | | |
Collapse
|
15
|
Karst D, Yang Y. Method for predicting sorption of small drug molecules onto polylactide. J Biomed Mater Res A 2009; 88:255-63. [DOI: 10.1002/jbm.a.31882] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
16
|
Cevher E, Orhan Z, Sensoy D, Ahiskali R, Kan PL, Sağirli O, Mülazimoğlu L. Sodium fusidate-poly(D,L-lactide-co-glycolide) microspheres: Preparation, characterisation andin vivoevaluation of their effectiveness in the treatment of chronic osteomyelitis. J Microencapsul 2008; 24:577-95. [PMID: 17654177 DOI: 10.1080/02652040701472584] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
PURPOSE The aim of this study was to prepare poly(D,L-lactide-co-glycolide) (PLGA) microspheres containing sodium fusidate (SF) using a double emulsion solvent evaporation method with varying polymer:drug ratios (1:1, 2.5:1, 5:1) and to evaluate its efficiency for the local treatment of chronic osteomyelitis. METHODS The particle size and distribution, morphological characteristics, thermal behaviour, drug content, encapsulation efficiency and in vitro release assessments of the formulations had been carried out. Sterilized SF-PLGA microspheres were implanted in the proximal tibia of rats with methicillin-resistant Staphylococcus aureus (MRSA) osteomyelitis. After 3 weeks of treatment, bone samples were analysed with a microbiological assay. RESULTS PLGA microspheres between the size ranges of 2.16-4.12 microm were obtained. Production yield of all formulations was found to be higher than 79% and encapsulation efficiencies of 19.8-34.3% were obtained. DSC thermogram showed that the SF was in an amorphous state in the microspheres and the glass transition temperature (T(g)) of PLGA was not influenced by the preparation procedure. In vitro drug release studies had indicated that these microspheres had significant burst release and their drug release rates were decreased upon increasing the polymer:drug ratio (p < 0.05). Based on the in vivo data, rats implanted with SF-PLGA microspheres and empty microspheres showed 1987 +/- 1196 and 55526 +/- 49086 colony forming unit of MRSA in 1 g bone samples (CFU/g), respectively (p < 0.01). CONCLUSION The in vitro and in vivo studies had shown that the implanted SF loaded microspheres were found to be effective for the treatment of chronic osteomyelitis in an animal experimental model. Hence, these microspheres may be potentially useful in the clinical setting.
Collapse
Affiliation(s)
- Erdal Cevher
- Department of Pharmaceutical Technology, Faculty of Pharmacy, Istanbul University, Istanbul, Turkey.
| | | | | | | | | | | | | |
Collapse
|
17
|
Nagashima T, Oliveira EE, da Silva AE, Marcelino HR, Gomes MCS, Aguiar LM, de Araújo IB, Soares LAL, de Oliveira AG, do Egito EST. Influence of the lipophilic external phase composition on the preparation and characterization of xylan microcapsules--a technical note. AAPS PharmSciTech 2008; 9:814-7. [PMID: 18607759 PMCID: PMC2977046 DOI: 10.1208/s12249-008-9115-z] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Accepted: 04/23/2008] [Indexed: 11/30/2022] Open
Affiliation(s)
- Toshiyuki Nagashima
- />Programa de Pós-graduação em Ciências da Saúde, Universidade Federal do Rio Grande do Norte (UFRN), Centro de Ciências da Saúde (CCS), Laboratório de Sistemas Dispersos (LaSid), Natal, RN Brazil
| | - Elquio Eleamen Oliveira
- />Programa de Pós-graduação em Ciências da Saúde, Universidade Federal do Rio Grande do Norte (UFRN), Centro de Ciências da Saúde (CCS), Laboratório de Sistemas Dispersos (LaSid), Natal, RN Brazil
- />Centro de Ciências Biológicas e Sociais Aplicadas (CCBSA), Universidade Estadual da Paraíba, João Pessoa, PB Brazil
| | | | | | | | | | | | | | - Anselmo Gomes de Oliveira
- />Departamento de Fármacos e Medicamentos, Faculdade de Ciências Farmacêuticas, UNESP, Rodovia Araraquara, Jaú km 01, 14801-902 Araraquara SP, Brazil
| | - E. Sócrates Tabosa do Egito
- />Programa de Pós-graduação em Ciências da Saúde, Universidade Federal do Rio Grande do Norte (UFRN), Centro de Ciências da Saúde (CCS), Laboratório de Sistemas Dispersos (LaSid), Natal, RN Brazil
- />Programa de Pós-graduação em Ciências Farmacêuticas, UFRN, CCS, LaSID, Natal, RN Brazil
- />Departamento de Farmácia, UFRN, CCS, LaSid, Natal, RN Brazil
| |
Collapse
|