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Jackson J. Triple Encapsulation and Controlled Release of Vancomycin, Rifampicin and Silver from Poly (Methyl Methacrylate) or Poly (Lactic-Co-Glycolic Acid) Nanofibers. Bioengineering (Basel) 2024; 11:529. [PMID: 38927765 PMCID: PMC11200951 DOI: 10.3390/bioengineering11060529] [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: 05/01/2024] [Revised: 05/14/2024] [Accepted: 05/20/2024] [Indexed: 06/28/2024] Open
Abstract
Although the incidence of infections in orthopedic surgeries, including periprosthetic surgeries, remains low at approximately 1-2%, the number of surgeries and the incidence of drug-resistant bacteria is increasing. The cost and morbidity associated with revision surgeries are huge. More effective drug combinations and delivery methods are urgently needed. In this paper, three anti-infective drugs (vancomycin, rifampicin, and silver sulfadiazine) have been jointly and effectively electrospun in thin (0.1 mm) flexible nanofiber mats of either poly (methyl methacrylate) (PMMA) or poly (lactic-co-glycolic acid) (PLGA). The inclusion of poly (ethylene glycol) (PEG) enabled optimal drug release with a reduced water contact angle for wetting. The controlled release of these three agents from 20% PEG (w/w to polymer)-blended PMMA or PLGA nanofiber mats may allow for the prophylactical prevention of implant-related infections or provide methods to treat orthopedic infections at the time of revision surgeries. These combinations of drugs provide excellent additive or synergistic antibiotic action against a broader spectrum of bacteria than each drug alone.
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Affiliation(s)
- John Jackson
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2405 Wesbrook Mall, UBC, Vancouver, BC V6T 1Z3, Canada
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Jackson J, Dietrich CH. Synergistic Antibacterial Effects of Gallate Containing Compounds with Silver Nanoparticles in Gallate Crossed Linked PVA Hydrogel Films. Antibiotics (Basel) 2024; 13:312. [PMID: 38666988 PMCID: PMC11047530 DOI: 10.3390/antibiotics13040312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2024] [Revised: 03/23/2024] [Accepted: 03/27/2024] [Indexed: 04/29/2024] Open
Abstract
Currently available silver-based antiseptic wound dressings have limited patient effectiveness. There exists a need for wound dressings that behave as comfortable degradable hydrogels with a strong antibiotic potential. The objectives of this project were to investigate the combined use of gallates (either epi gallo catechin gallate (EGCG), Tannic acid, or Quercetin) as both PVA crosslinking agents and as potential synergistic antibiotics in combination with silver nanoparticles. Crosslinking was assessed gravimetrically, silver and gallate release was measured using inductively coupled plasma and HPLC methods, respectively. Synergy was measured using 96-well plate FICI methods and in-gel antibacterial effects were measured using planktonic CFU assays. All gallates crosslinked PVA with optimal extended swelling obtained using EGCG or Quercetin at 14% loadings (100 mg in 500 mg PVA with glycerol). All three gallates were synergistic in combination with silver nanoparticles against both gram-positive and -negative bacteria. In PVA hydrogel films, silver nanoparticles with EGCG or Quercetin more effectively inhibited bacterial growth in CFU counts over 24 h as compared to films containing single agents. These biocompatible natural-product antibiotics, EGCG or Quercetin, may play a dual role of providing stable PVA hydrogel films and a powerful synergistic antibiotic effect in combination with silver nanoparticles.
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Affiliation(s)
- John Jackson
- Faculty of Pharmaceutical Sciences, University of British Columbia, 2405 Wesbrook Mall, Vancouver, BC V6T1Z3, Canada
| | - Claudia Helena Dietrich
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC V6T1Z7, Canada;
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Kan YC, Guo R, Xu Y, Han LY, Bu WH, Han LX, Chu JJ. Investigating the in vitro antibacterial efficacy of composite bone cement incorporating natural product-based monomers and gentamicin. J Orthop Surg Res 2024; 19:169. [PMID: 38448971 PMCID: PMC10918884 DOI: 10.1186/s13018-024-04646-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 02/26/2024] [Indexed: 03/08/2024] Open
Abstract
OBJECTIVE The objective of this study is to investigate the impact of four natural product extracts, namely, aloe-emodin, quercetin, curcumin, and tannic acid, on the in vitro bacteriostatic properties and biocompatibility of gentamicin-loaded bone cement and to establish an experimental groundwork supporting the clinical utility of antibiotic-loaded bone cements (ALBC). METHODS Based on the components, the bone cement samples were categorized as follows: the gentamicin combined with aloe-emodin group, the gentamicin combined with quercetin group, the gentamicin combined with curcumin group, the gentamicin combined with tannic acid group, the gentamicin group, the aloe-emodin group, the quercetin group, the curcumin group, and the tannic acid group. Using the disk diffusion test, we investigated the antibacterial properties of the bone cement material against Staphylococcus aureus (n = 4). We tested cell toxicity and proliferation using the cell counting kit-8 (CCK-8) and examined the biocompatibility of bone cement materials. RESULTS The combination of gentamicin with the four natural product extracts resulted in significantly larger diameters of inhibition zones compared to gentamicin alone, and the difference was statistically significant (P < 0.05). Except for the groups containing tannic acid, cells in all other groups showed good proliferation across varying time intervals without displaying significant cytotoxicity (P < 0.05). CONCLUSION In this study, aloe-emodin, quercetin, curcumin, and tannic acid were capable of enhancing the in vitro antibacterial performance of gentamicin-loaded bone cement against S. aureus. While the groups containing tannic acid displayed moderate cytotoxicity in in vitro cell culture, all other groups showed no discernible cytotoxic effects.
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Affiliation(s)
- Yu-Chen Kan
- Department of Orthopedics, The Second People's Hospital of Hefei, Hefei Hospital, Affiliated to Anhui Medical University, No. 246 of Heping Road, Yaohai District, Hefei, Anhui, 230011, China
- The Fifth Clinical Medical School of Anhui Medical University, Hefei, Anhui, 230032, China
| | - Rui Guo
- Department of Orthopedics, The Second People's Hospital of Hefei, Hefei Hospital, Affiliated to Anhui Medical University, No. 246 of Heping Road, Yaohai District, Hefei, Anhui, 230011, China
- The Fifth Clinical Medical School of Anhui Medical University, Hefei, Anhui, 230032, China
| | - Yang Xu
- School of Food and Biological Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
| | - Lu-Yang Han
- Department of Orthopedics, The Second People's Hospital of Hefei, Hefei Hospital, Affiliated to Anhui Medical University, No. 246 of Heping Road, Yaohai District, Hefei, Anhui, 230011, China
| | - Wen-Han Bu
- Department of Orthopedics, The Second People's Hospital of Hefei, Hefei Hospital, Affiliated to Anhui Medical University, No. 246 of Heping Road, Yaohai District, Hefei, Anhui, 230011, China
| | - Long-Xu Han
- Department of Orthopedics, The Second People's Hospital of Hefei, Hefei Hospital, Affiliated to Anhui Medical University, No. 246 of Heping Road, Yaohai District, Hefei, Anhui, 230011, China
| | - Jian-Jun Chu
- Department of Orthopedics, The Second People's Hospital of Hefei, Hefei Hospital, Affiliated to Anhui Medical University, No. 246 of Heping Road, Yaohai District, Hefei, Anhui, 230011, China.
- The Fifth Clinical Medical School of Anhui Medical University, Hefei, Anhui, 230032, China.
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熊 伟, 袁 灵, 王 梁, 钱 国, 梁 超, 潘 斌, 郭 灵, 魏 文, 邱 勋, 邓 文, 曾 志. [Preparation of berberine-naringin dual drug-loaded composite microspheres and evaluation of their antibacterial-osteogenic properties]. ZHONGGUO XIU FU CHONG JIAN WAI KE ZA ZHI = ZHONGGUO XIUFU CHONGJIAN WAIKE ZAZHI = CHINESE JOURNAL OF REPARATIVE AND RECONSTRUCTIVE SURGERY 2023; 37:1505-1513. [PMID: 38130195 PMCID: PMC10739667 DOI: 10.7507/1002-1892.202308054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 11/20/2023] [Accepted: 11/21/2023] [Indexed: 12/23/2023]
Abstract
Objective To develop a drug-loaded composite microsphere that can simultaneously release the berberine (BBR) and naringin (NG) to repair infectious bone defects. Methods The NG was loaded on mesoporous microspheres (MBG) to obtain the drug-loaded microspheres (NG-MBG). Then the dual drug-loaded compound microspheres (NG-MBG@PDA-BBR) were obtained by wrapping NG-MBG with polydopamine (PDA) and modifying the coated PDA with BBR. The composite microspheres were characterized by scanning electron microscopy, X-ray diffraction, specific surface area and pore volume analyzer, and Fourier transform infrared spectroscopy; the drug loading rate and release of NG and BBR were measured; the colony number was counted and the bacterial inhibition rate was calculated after co-culture with Staphylococcus aureus and Escherichia coli for 12 hours to observe the antibacterial effect; the biocompatibility was evaluated by live/dead cell fluorescence staining and cell counting kit 8 assay after co-culture with rat's BMSCs for 24 and 72 hours, respectively, and the osteogenic property was evaluated by alkaline phosphatase (ALP) staining and alizarin red staining after 7 and 14 days, respectively. Results NG-MBG@PDA-BBR and three control microspheres (MBG, MBG@PDA, and NG-MBG@PDA) were successfully constructed. Scanning electron microscopy showed that NG-MBG@PDA-BBR had a rough lamellar structure, while MBG had a smooth surface, and MBG@PDA and NG-MBG@PDA had a wrapped agglomeration structure. Specific surface area analysis showed that MBG had a mesoporous structure and had drug-loading potential. Low angle X-ray diffraction showed that NG was successfully loaded on MBG. The X-ray diffraction pattern contrast showed that all groups of microspheres were amorphous. Fourier transform infrared spectroscopy showed that NG and BBR peaks existed in NG-MBG@PDA-BBR. NG-MBG@PDA-BBR had good sustained drug release ability, and NG and BBR had early burst release and late sustained release. NG-MBG@PDA-BBR could inhibit the growth of Staphylococcus aureus and Escherichia coli, and the antibacterial ability was significantly higher than that of MBG, MBG@PDA, and NG-MBG@PDA ( P<0.05). But there was a significant difference in biocompatibility at 72 hours among microspheres ( P<0.05). ALP and alizarin red staining showed that the ALP positive area and the number of calcium nodules in NG-MBG@PDA-BBR were significantly higher than those of MBG and NG-MBG ( P<0.05), and there was no significant difference between NG-MBG@PDA and NG-MBG@PDA ( P>0.05). Conclusion NG-MBG@PDA-BBR have sustained release effects on NG and BBR, indicating that it has ideal dual performance of osteogenesis and antibacterial property.
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Affiliation(s)
- 伟 熊
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 灵梅 袁
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 梁霞 王
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 国文 钱
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 超轶 梁
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 斌 潘
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 灵 郭
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 文强 魏
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 勋祥 邱
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 文芳 邓
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
| | - 志奎 曾
- 江西中医药大学研究生院(南昌 330004)Graduate School, Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330004, P. R. China
- 江西中医药大学附属医院眼科(南昌 330006)Department of Ophthalmology, Affiliated Hospital of Jiangxi University of Traditional Chinese Medicine, Nanchang Jiangxi, 330006, P. R. China
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Fan L, Pan Z, Zhong Y, Guo J, Liao X, Pang R, Xu Q, Ye G, Su Y. L-glutamine sensitizes Gram-positive-resistant bacteria to gentamicin killing. Microbiol Spectr 2023; 11:e0161923. [PMID: 37882580 PMCID: PMC10715002 DOI: 10.1128/spectrum.01619-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/23/2023] [Indexed: 10/27/2023] Open
Abstract
IMPORTANCE Methicillin-resistant Staphylococcus aureus (MRSA) infection severely threatens human health due to high morbidity and mortality; it is urgent to develop novel strategies to tackle this problem. Metabolites belong to antibiotic adjuvants which improve the effect of antibiotics. Despite reports of L-glutamine being applied in antibiotic adjuvant for Gram-negative bacteria, how L-glutamine affects antibiotics against Gram-positive-resistant bacteria is still unclear. In this study, L-glutamine increases the antibacterial effect of gentamicin on MRSA, and it links to membrane permeability and pH gradient (ΔpH), resulting in uptake of more gentamicin. Of great interest, reduced reactive oxygen species (ROS) by glutathione was found under L-glutamine treatment; USA300 becomes sensitive again to gentamicin. This study not only offers deep understanding on ΔpH and ROS on bacterial resistance but also provides potential treatment solutions for targeting MRSA infection.
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Affiliation(s)
- Lvyuan Fan
- Department of Cell Biology & Institute of Biomedicine National Engineering Research Center of Genetic Medicine, MOE Key Laboratory of Tumor Molecular Biology, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology,Jinan University, Guangzhou, China
| | - Zhiyu Pan
- Department of Cell Biology & Institute of Biomedicine National Engineering Research Center of Genetic Medicine, MOE Key Laboratory of Tumor Molecular Biology, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology,Jinan University, Guangzhou, China
| | - Yilin Zhong
- Department of Cell Biology & Institute of Biomedicine National Engineering Research Center of Genetic Medicine, MOE Key Laboratory of Tumor Molecular Biology, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology,Jinan University, Guangzhou, China
| | - Juan Guo
- Department of Cell Biology & Institute of Biomedicine National Engineering Research Center of Genetic Medicine, MOE Key Laboratory of Tumor Molecular Biology, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology,Jinan University, Guangzhou, China
| | - Xu Liao
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
| | - Rui Pang
- Guangdong Provincial Key Laboratory of Microbial Safety and Health,State Key Laboratory of Applied Microbiology Southern China, Guangdong Institute of Microbiology, Guangdong Academy of Sciences, Guangzhou, China
| | - Qingqiang Xu
- Department of Cell Biology & Institute of Biomedicine National Engineering Research Center of Genetic Medicine, MOE Key Laboratory of Tumor Molecular Biology, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology,Jinan University, Guangzhou, China
| | - Guozhu Ye
- Center for Excellence in Regional Atmospheric Environment and Key Laboratory of Urban Environment and Health, Institute of Urban Environment, Chinese Academy of Sciences, Xiamen, China
| | - Yubin Su
- Department of Cell Biology & Institute of Biomedicine National Engineering Research Center of Genetic Medicine, MOE Key Laboratory of Tumor Molecular Biology, Guangdong Provincial Key Laboratory of Bioengineering Medicine, College of Life Science and Technology,Jinan University, Guangzhou, China
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6
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Alavi M, Nokhodchi A. Micro- and nanoformulations of antibiotics against Brucella. Drug Discov Today 2023; 28:103809. [PMID: 37923166 DOI: 10.1016/j.drudis.2023.103809] [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: 07/31/2023] [Revised: 10/24/2023] [Accepted: 10/27/2023] [Indexed: 11/07/2023]
Abstract
Brucellosis, a zoonotic intracellular bacterial infection primarily transmitted through the consumption of unpasteurized milk from infected animals, remains a challenging condition to clinically control. This is mainly because of the limited effectiveness of conventional antibiotics in targeting intracellular Brucella. Micro- and nanoformulations of antibiotics, whether used as a mono- or combination therapy, have the potential to reduce the antibiotic doses required and treatment duration. Extensive research has been conducted on various organic, semiorganic, and inorganic nanomaterials with different morphologies, such as nanoparticles (NPs), nanotubes, nanowires, and nanobelts. Metal/metal oxide, lipidic, polymeric, and carbonic NPs have been widely explored to overcome the limitations of traditional formulations. In this review, we discuss the advances and challenges of these novel formulations based on recent investigations.
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Affiliation(s)
- Mehran Alavi
- Department of Biological Science, Faculty of Science, University of Kurdistan, Sanandaj, Kurdistan, Iran.
| | - Ali Nokhodchi
- School of Life Sciences, University of Sussex, Brighton, UK; Lupin Research Inc, Lupin Pharmaceuticals, Coral Springs, FL, USA; Daru Vira Iranian Pharmaceutical Group, Isfahan, Iran.
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Chevallier P, Wiggers HJ, Copes F, Zorzi Bueno C, Mantovani D. Prolonged Antibacterial Activity in Tannic Acid-Iron Complexed Chitosan Films for Medical Device Applications. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:484. [PMID: 36770445 PMCID: PMC9919247 DOI: 10.3390/nano13030484] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 01/18/2023] [Accepted: 01/19/2023] [Indexed: 06/18/2023]
Abstract
Healthcare-associated infections (HAIs) represent a global burden, leading to significant mortality and generating financial costs. One important cause of HAIs is the microbiological contamination of implantable medical devices. In this context, a novel antimicrobial drug-eluting system, based on chitosan and loaded with gentamicin, a broad-spectrum antibiotic, was developed. The effects of the addition of tannic acid and different FeSO4 concentrations on the loaded antibiotic release were evaluated. The properties of the films were assessed in terms of thickness, swelling, mass loss and wettability. The films' surface composition was characterized by X-ray photoelectron spectroscopy and Fourier-transform infrared spectroscopy. The antibiotic release in phosphate buffer saline was quantified by high-performance liquid chromatography-mass spectrometry, and the antibacterial activity was evaluated. Hemolysis and cytotoxicity were also assessed. The results showed that the addition of tannic acid and iron decreased the swelling degree and degradation due to strong interactions between the different components, thus impacting gentamicin release for up to 35 days. In conclusion, this study presents a novel strategy to produce low-cost and biocompatible antimicrobial drug-eluting systems with sustained and prolonged antibacterial activity over more than a month.
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Affiliation(s)
- Pascale Chevallier
- Laboratory for Biomaterials and Bioengineering (LBB-UL), Canada Research Chair Tier I, Department of Min-Met-Materials Engineering & CHU de Quebec Research Center, Division Regenerative Medicine, Laval University, Quebec City, QC G1V0A6, Canada
| | - Helton José Wiggers
- Laboratory for Biomaterials and Bioengineering (LBB-BPK), Associação de Ensino, Pesquisa e Extensão BIOPARK, Max Planck Avenue, 3797, Building Charles Darwin, Toledo 85919-899, PR, Brazil
| | - Francesco Copes
- Laboratory for Biomaterials and Bioengineering (LBB-UL), Canada Research Chair Tier I, Department of Min-Met-Materials Engineering & CHU de Quebec Research Center, Division Regenerative Medicine, Laval University, Quebec City, QC G1V0A6, Canada
| | - Cecilia Zorzi Bueno
- Laboratory for Biomaterials and Bioengineering (LBB-BPK), Associação de Ensino, Pesquisa e Extensão BIOPARK, Max Planck Avenue, 3797, Building Charles Darwin, Toledo 85919-899, PR, Brazil
| | - Diego Mantovani
- Laboratory for Biomaterials and Bioengineering (LBB-UL), Canada Research Chair Tier I, Department of Min-Met-Materials Engineering & CHU de Quebec Research Center, Division Regenerative Medicine, Laval University, Quebec City, QC G1V0A6, Canada
- Laboratory for Biomaterials and Bioengineering (LBB-BPK), Associação de Ensino, Pesquisa e Extensão BIOPARK, Max Planck Avenue, 3797, Building Charles Darwin, Toledo 85919-899, PR, Brazil
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Zhang X, Chen P, Wan HY, Zhu RJ, Zhou Y, Song MR, Jiang N, Yu B. Antimicrobial potency, prevention ability, and killing efficacy of daptomycin-loaded versus vancomycin-loaded β-tricalcium phosphate/calcium sulfate for methicillin-resistant Staphylococcus aureus biofilms. Front Microbiol 2022; 13:1029261. [PMID: 36406460 PMCID: PMC9669593 DOI: 10.3389/fmicb.2022.1029261] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/12/2022] [Indexed: 11/06/2022] Open
Abstract
Growing evidence has shown that the efficacy of systemic administration of daptomycin for the treatment of methicillin-resistant Staphylococcus aureus (MRSA)-related infections is satisfactory. However, the clinical efficacy of the local administration of daptomycin for the management of osteoarticular infections remains unclear. This in vitro study compared the efficacy of daptomycin and vancomycin against MRSA biofilms. The elution kinetics of daptomycin and vancomycin, combined with gentamicin and loaded with either β-tricalcium phosphate/calcium sulfate or calcium sulfate, in the presence of MRSA infection, was assessed. Their efficacy in preventing biofilm formation and killing pre-formed biofilms was assessed using colony-forming unit count and confocal laser scanning microscopy. In addition, the efficacy of daptomycin, vancomycin, and gentamicin in prophylaxis and eradication of MRSA biofilms was also evaluated. Daptomycin + gentamicin and vancomycin + gentamicin displayed similar antimicrobial potency against MRSA, by either β-tricalcium phosphate/calcium sulfate or calcium sulfate. In the prevention assays, both daptomycin + gentamicin and vancomycin + gentamicin showed similar efficacy in preventing bacterial colony formation, with approximately 6 logs lower colony-forming units than those in the control group at both 1 and 3 days. The killing effect on pre-formed biofilms showed significant decreases of approximately 4 logs at 1 and 3 days following treatment with daptomycin + gentamicin and vancomycin + gentamicin. In addition, the confocal laser scanning microscopy results support the colony-forming unit data. Moreover, single use of vancomycin and gentamicin showed similar efficacies in preventing and killing MRSA biofilms, both of which were better than that of gentamicin. Our study demonstrated that vancomycin + gentamicin and daptomycin + gentamicin loaded with β-tricalcium phosphate/calcium sulfate or calcium sulfate showed similar prophylactic and killing effects on MRSA biofilms, implying a potential indication of local administration daptomycin for the treatment of MRSA-associated osteoarticular infections, especially if vancomycin administration presents limitations.
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Affiliation(s)
- Xin Zhang
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Orthopaedics and Traumatology, Wuyi Hospital of Traditional Chinese Medicine, Jiangmen, China
| | - Peng Chen
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Department of Orthopaedics, Hainan General Hospital, Hainan Hospital Affiliated to Hainan Medical University, Haikou, China
| | - Hao-yang Wan
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Run-jiu Zhu
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yue Zhou
- School of Nursing, Jiangmen Chinese Medicine College of Guangdong Province, Jiangmen, China
| | - Ming-rui Song
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Nan Jiang
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
- *Correspondence: Nan Jiang,
| | - Bin Yu
- Division of Orthopaedics and Traumatology, Department of Orthopaedics, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Guangdong Provincial Key Laboratory of Bone and Cartilage Regenerative Medicine, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Bin Yu,
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Chen Y, Caneli G, Xie D. A PMMA bone cement with improved antibacterial function and flexural strength. JOURNAL OF BIOMATERIALS SCIENCE. POLYMER EDITION 2022; 33:1398-1414. [PMID: 35321628 DOI: 10.1080/09205063.2022.2056943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2022] [Revised: 03/16/2022] [Accepted: 03/20/2022] [Indexed: 06/14/2023]
Abstract
A novel non-leaching antibacterial bone cement has been developed and evaluated. An antibacterial furanone derivative was synthesized and covalently coated onto the surface of alumina filler particles, followed by mixing into a conventional poly(methyl methacrylate) bone cement. Flexural strength and bacterial viability were used to evaluate the modified cements. Effects of coated antibacterial moiety content, coated alumina filler particle size and loading were investigated. Results showed that almost all the modified cements showed higher flexural strength (up to 10%), flexural modulus (up to 18%), and antibacterial activity (up to 67% to S. aureus and up to 84% to E. coli), as compared to original poly(methyl methacrylate) cement. Increasing antibacterial moiety and filler loading significantly enhanced antibacterial activity. On the other hand, increasing coated filler particle size decreased antibacterial activity. Increasing antibacterial moiety content and particle size did not significantly affect flexural strength and modulus. Increasing filler loading did not significantly affect flexural modulus but reduced flexural strength. Antibacterial agent leaching tests showed that it seems no leachable antibacterial component from the modified experimental cement to the surrounding environment. Within the limitations of this study, the modified poly(methyl methacrylate) bone cement may potentially be developed into a clinically useful bone cement for reducing in-surgical and post-surgical infection.
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Affiliation(s)
- Yong Chen
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana, USA
- Jinchu University, Hubei, P.R. China
| | - Gulsah Caneli
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana, USA
| | - Dong Xie
- Department of Biomedical Engineering, Purdue School of Engineering and Technology, Indiana University-Purdue University at Indianapolis, Indianapolis, Indiana, USA
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Current Knowledge on Biomaterials for Orthopedic Applications Modified to Reduce Bacterial Adhesive Ability. Antibiotics (Basel) 2022; 11:antibiotics11040529. [PMID: 35453280 PMCID: PMC9024841 DOI: 10.3390/antibiotics11040529] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Revised: 04/08/2022] [Accepted: 04/11/2022] [Indexed: 02/01/2023] Open
Abstract
A significant challenge in orthopedics is the design of biomaterial devices that are able to perform biological functions by substituting or repairing various tissues and controlling bone repair when required. This review presents an overview of the current state of our recent research into biomaterial modifications to reduce bacterial adhesive ability, compared with previous reviews and excellent research papers, but it is not intended to be exhaustive. In particular, we investigated biomaterials for replacement, such as metallic materials (titanium and titanium alloys) and polymers (ultra-high-molecular-weight polyethylene), and biomaterials for regeneration, such as poly(ε-caprolactone) and calcium phosphates as composites. Biomaterials have been designed, developed, and characterized to define surface/bulk features; they have also been subjected to bacterial adhesion assays to verify their potential capability to counteract infections. The addition of metal ions (e.g., silver), natural antimicrobial compounds (e.g., essential oils), or antioxidant agents (e.g., vitamin E) to different biomaterials conferred strong antibacterial properties and anti-adhesive features, improving their capability to counteract prosthetic joint infections and biofilm formation, which are important issues in orthopedic surgery. The complexity of biological materials is still far from being reached by materials science through the development of sophisticated biomaterials. However, close interdisciplinary work by materials scientists, engineers, microbiologists, chemists, physicists, and orthopedic surgeons is indeed necessary to modify the structures of biomaterials in order to achieve implant integration and tissue regeneration while avoiding microbial contamination.
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Filip Ionescu OL, Mocanu AG, Neacşu IA, Ciocîlteu MV, Rău G, Neamţu J. Biocompatibility Studies on a Collagen-Hydroxyapatite Biomaterial. CURRENT HEALTH SCIENCES JOURNAL 2022; 48:217-225. [PMID: 36320879 PMCID: PMC9590366 DOI: 10.12865/chsj.48.02.12] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 05/24/2022] [Indexed: 01/25/2023]
Abstract
The current treatment of osteomyelitis includes systemic antibiotic therapy and a debridement procedure of the formed biofilm and necrotic tissue. Moreover, cements and three-dimensional scaffolds are used both for the delivery of therapeutic agents and as fillers for bone defects. The aim of our research was to test, on cellular cultures, the biocompatibility of a previously synthesized microporous biocomposite containing hydroxyapatite and a collagen matrix including a therapeutic agent (ciprofloxacin and gentamicin). The scaffold was obtained by direct mineralization namely co-precipitation of hydroxyapatite on a collagen matrix.
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Affiliation(s)
| | | | - Ionela Andreea Neacşu
- Faculty of Appplied Chemistry and Materials Science, Politehnica University of Bucharest, Romania
| | | | - Gabriela Rău
- Faculty of Pharmacy, University of Medicine and Pharmacy of Craiova, Romania
| | - Johny Neamţu
- Faculty of Pharmacy, University of Medicine and Pharmacy of Craiova, Romania
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Prophylactic Antibiofilm Activity of Antibiotic-Loaded Bone Cements against Gram-Negative Bacteria. Antibiotics (Basel) 2022; 11:antibiotics11020137. [PMID: 35203740 PMCID: PMC8868455 DOI: 10.3390/antibiotics11020137] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 01/13/2022] [Accepted: 01/19/2022] [Indexed: 02/01/2023] Open
Abstract
Gram-negative bacilli can be responsible for prosthetic joint infection (PJI) even if staphylococci are the main involved pathogens. Gram-negative PJIs (GN-PJI) are considered difficult-to-treat infections due to the increase in antimicrobial resistance and biofilm formation. To minimize the risk of infection in cases of arthroplasties with cemented prosthesis, bone cement can be loaded with antibiotics, especially gentamicin. In this study, we aimed to compare the prophylactic antibiofilm activity of ready-to-use antibiotic-loaded bone cements (ALBC), already commercialized or new prototypes. We compared ALBCs containing gentamicin alone, gentamicin plus vancomycin, gentamicin plus clindamycin, gentamicin plus Fosfomycin, and fosfomycin alone, to plain cement (no antibiotic); these comparisons were conducted to investigate the biofilm formation of three strains of Escherichia coli, three strains of Pseudomonas aeruginosa and two strains of Klebsiella pneumoniae, with or without specific resistance to gentamicin or fosfomycin. We reported that ALBC containing gentamicin and clindamycin (COPAL G+C) seems to be the most interesting ALBC of our tested panel for the prevention of biofilm formation by gentamicin-susceptible strains, even if clindamycin is not effective against Gram-negative bacteria. However, gentamicin-resistant strains are still a problem, and further studies are needed to identify an antibiotic to associate with gentamicin for an efficient dual ALBC against Gram-negative bacteria.
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