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Bārzdiņa A, Plotniece A, Sobolev A, Pajuste K, Bandere D, Brangule A. From Polymeric Nanoformulations to Polyphenols-Strategies for Enhancing the Efficacy and Drug Delivery of Gentamicin. Antibiotics (Basel) 2024; 13:305. [PMID: 38666981 PMCID: PMC11047640 DOI: 10.3390/antibiotics13040305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Revised: 03/25/2024] [Accepted: 03/27/2024] [Indexed: 04/29/2024] Open
Abstract
Gentamicin is an essential broad-spectrum aminoglycoside antibiotic that is used in over 40 clinical conditions and has shown activity against a wide range of nosocomial, biofilm-forming, multi-drug resistant bacteria. Nevertheless, the low cellular penetration and serious side effects of gentamicin, as well as the fear of the development of antibacterial resistance, has led to a search for ways to circumvent these obstacles. This review provides an overview of the chemical and pharmacological properties of gentamicin and offers six different strategies (the isolation of specific types of gentamicin, encapsulation in polymeric nanoparticles, hydrophobization of the gentamicin molecule, and combinations of gentamicin with other antibiotics, polyphenols, and natural products) that aim to enhance the drug delivery and antibacterial activity of gentamicin. In addition, factors influencing the synthesis of gentamicin-loaded polymeric (poly (lactic-co-glycolic acid) (PLGA) and chitosan) nanoparticles and the methods used in drug release studies are discussed. Potential research directions and future perspectives for gentamicin-loaded drug delivery systems are given.
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Affiliation(s)
- Ance Bārzdiņa
- Department of Pharmaceutical Chemistry, Riga Stradins University, 21 Konsula Str., LV-1007 Riga, Latvia; (A.P.)
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1007 Riga, Latvia
| | - Aiva Plotniece
- Department of Pharmaceutical Chemistry, Riga Stradins University, 21 Konsula Str., LV-1007 Riga, Latvia; (A.P.)
- Latvian Institute of Organic Synthesis, 21 Aizkraukles Str., LV-1006 Riga, Latvia; (A.S.); (K.P.)
| | - Arkadij Sobolev
- Latvian Institute of Organic Synthesis, 21 Aizkraukles Str., LV-1006 Riga, Latvia; (A.S.); (K.P.)
| | - Karlis Pajuste
- Latvian Institute of Organic Synthesis, 21 Aizkraukles Str., LV-1006 Riga, Latvia; (A.S.); (K.P.)
| | - Dace Bandere
- Department of Pharmaceutical Chemistry, Riga Stradins University, 21 Konsula Str., LV-1007 Riga, Latvia; (A.P.)
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1007 Riga, Latvia
| | - Agnese Brangule
- Department of Pharmaceutical Chemistry, Riga Stradins University, 21 Konsula Str., LV-1007 Riga, Latvia; (A.P.)
- Baltic Biomaterials Centre of Excellence, Headquarters at Riga Technical University, LV-1007 Riga, Latvia
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Razei A, Javanbakht M, Hajizade A, Heiat M, Zhao S, Aghamollaei H, Saadati M, Khafaei M, Asadi M, Cegolon L, Keihan AH. Nano and microparticle drug delivery systems for the treatment of Brucella infections. Biomed Pharmacother 2023; 169:115875. [PMID: 37979375 DOI: 10.1016/j.biopha.2023.115875] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 11/06/2023] [Accepted: 11/07/2023] [Indexed: 11/20/2023] Open
Abstract
Nano-based drug delivery systems are increasingly used for diagnosis, prevention and treatment of several diseases, thanks to several beneficial properties, including the ability to target specific cells or organs, allowing to reduce treatment costs and side effects frequently associated with chemotherapeutic medications, thereby improving treatment compliance of patients. In the field of communicable diseases, especially those caused by intracellular bacteria, the delivery of antibiotics targeting specific cells is of critical importance to maximize their treatment efficacy. Brucella melitensis, an intracellular obligate bacterium surviving and replicating inside macrophages is hard to be eradicated, mainly because of the low ability of antibiotics to enter these phagocityc cells . Although different antibiotics regimens including gentamicin, doxycycline and rifampicin are in fact used against the Brucellosis, no efficient treatment has been attained yet, due to the intracellular life of the respective pathogen. Nano-medicines responding to environmental stimuli allow to maximize drug delivery targeting macropages, thereby boosting treatment efficacy. Several drug delivery nano-technologies, including solid lipid nanoparticles, liposomes, chitosan, niosomes, and their combinations with chitosan sodium alginate can be employed in combination of antibiotics to successfully eradicate Brucellosis infection from patients.
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Affiliation(s)
- Ali Razei
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Mohammad Javanbakht
- Nephrology and Urology Research Center,Clinical Science Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran.
| | - Abbas Hajizade
- Biology Research Centre, Faculty of Basic Sciences, Imam Hossain University, Tehran, Iran
| | - Mohammad Heiat
- Baqiyatallah Research Center for Gastroenterology and Liver Diseases (BRCGL), Clinical Sciences Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Shi Zhao
- JC School of Public Health and Primary Care, Chinese University of Hong Kong, Hong Kong, China
| | - Hossien Aghamollaei
- Chemical Injuries Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Mojtaba Saadati
- Biology Research Centre, Faculty of Basic Sciences, Imam Hossain University, Tehran, Iran
| | - Mostafa Khafaei
- Human Genetics Research Center, Baqiyatallah Medical Science University, Tehran, Iran
| | - Mosa Asadi
- Nephrology and Urology Research Center,Clinical Science Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Luca Cegolon
- University of Trieste, Department of Medical, Surgical & Health Sciences, Trieste, Italy; University Health Agency Giuliano-Isontina (ASUGI), Public Health Department, Trieste, Italy
| | - Amir Homayoun Keihan
- Molecular Biology Research Center, Systems Biology and Poisonings Institute, Baqiyatallah University of Medical Sciences, Tehran, Iran
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Shakya AK, Al-Sulaibi M, Naik RR, Nsairat H, Suboh S, Abulaila A. Review on PLGA Polymer Based Nanoparticles with Antimicrobial Properties and Their Application in Various Medical Conditions or Infections. Polymers (Basel) 2023; 15:3597. [PMID: 37688223 PMCID: PMC10490122 DOI: 10.3390/polym15173597] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Revised: 08/19/2023] [Accepted: 08/25/2023] [Indexed: 09/10/2023] Open
Abstract
The rise in the resistance to antibiotics is due to their inappropriate use and the use of a broad spectrum of antibiotics. This has also contributed to the development of multidrug-resistant microorganisms, and due to the unavailability of suitable new drugs for treatments, it is difficult to control. Hence, there is a need for the development of new novel, target-specific antimicrobials. Nanotechnology, involving the synthesis of nanoparticles, may be one of the best options, as it can be manipulated by using physicochemical properties to develop intelligent NPs with desired properties. NPs, because of their unique properties, can deliver drugs to specific targets and release them in a sustained fashion. The chance of developing resistance is very low. Polymeric nanoparticles are solid colloids synthesized using either natural or synthetic polymers. These polymers are used as carriers of drugs to deliver them to the targets. NPs, synthesized using poly-lactic acid (PLA) or the copolymer of lactic and glycolic acid (PLGA), are used in the delivery of controlled drug release, as they are biodegradable, biocompatible and have been approved by the USFDA. In this article, we will be reviewing the synthesis of PLGA-based nanoparticles encapsulated or loaded with antibiotics, natural products, or metal ions and their antibacterial potential in various medical applications.
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Affiliation(s)
- Ashok K. Shakya
- Faculty of Pharmacy, Al-Ahliyya Amman University, Amman 19328, Jordan
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy and Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19328, Jordan
| | - Mazen Al-Sulaibi
- Faculty of Pharmacy, Al-Ahliyya Amman University, Amman 19328, Jordan
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy and Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19328, Jordan
| | - Rajashri R. Naik
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy and Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19328, Jordan
- Faculty of Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19328, Jordan
| | - Hamdi Nsairat
- Faculty of Pharmacy, Al-Ahliyya Amman University, Amman 19328, Jordan
- Pharmacological and Diagnostic Research Center, Faculty of Pharmacy and Allied Medical Sciences, Al-Ahliyya Amman University, Amman 19328, Jordan
| | - Sara Suboh
- Faculty of Pharmacy, Al-Ahliyya Amman University, Amman 19328, Jordan
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Composite Polyurethane-Polylactide (PUR/PLA) Flexible Filaments for 3D Fused Filament Fabrication (FFF) of Antibacterial Wound Dressings for Skin Regeneration. MATERIALS 2021; 14:ma14206054. [PMID: 34683646 PMCID: PMC8538761 DOI: 10.3390/ma14206054] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2021] [Revised: 10/06/2021] [Accepted: 10/08/2021] [Indexed: 12/27/2022]
Abstract
This paper addresses the potential application of flexible thermoplastic polyurethane (TPU) and poly(lactic acid) (PLA) compositions as a material for the production of antibacterial wound dressings using the Fused Filament Fabrication (FFF) 3D printing method. On the market, there are medical-grade polyurethane filaments available, but few of them have properties required for the fabrication of wound dressings, such as flexibility and antibacterial effects. Thus, research aimed at the production, characterization and modification of filaments based on different TPU/PLA compositions was conducted. The combination of mechanical (tensile, hardness), structural (FTIR), microscopic (optical and SEM), degradation (2 M HCl, 5 M NaOH, and 0.1 M CoCl2 in 20% H2O2) and printability analysis allowed us to select the most promising composition for further antibacterial modification (COMP-7,5PLA). The thermal stability of the chosen antibiotic—amikacin—was tested using processing temperature and HPLC. Two routes were used for the antibacterial modification of the selected filament—post-processing modification (AMI-1) and modification during processing (AMI-2). The antibacterial activity and amikacin release profiles were studied. The postprocessing modification method turned out to be superior and suitable for wound dressing fabrication due to its proven antimicrobial activity against E. coli, P. fluorescens, S. aureus and S. epidermidis bacteria.
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Glinka M, Filatova K, Kucińska-Lipka J, Bergerova ED, Wasik A, Sedlařík V. Encapsulation of Amikacin into Microparticles Based on Low-Molecular-Weight Poly(lactic acid) and Poly(lactic acid- co-polyethylene glycol). Mol Pharm 2021; 18:2986-2996. [PMID: 34196555 PMCID: PMC8397404 DOI: 10.1021/acs.molpharmaceut.1c00193] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/16/2021] [Accepted: 06/21/2021] [Indexed: 11/28/2022]
Abstract
The aim of this study was to fabricate novel microparticles (MPs) for efficient and long-term delivery of amikacin (AMI). The emulsification method proposed for encapsulating AMI employed low-molecular-weight poly(lactic acid) (PLA) and poly(lactic acid-co-polyethylene glycol) (PLA-PEG), both supplemented with poly(vinyl alcohol) (PVA). The diameters of the particles obtained were determined as less than 30 μm. Based on an in-vitro release study, it was proven that the MPs (both PLA/PVA- and PLA-PEG/PVA-based) demonstrated long-term AMI release (2 months), the kinetics of which adhered to the Korsmeyer-Peppas model. The loading efficiencies of AMI in the study were determined at the followings levels: 36.5 ± 1.5 μg/mg for the PLA-based MPs and 106 ± 32 μg/mg for the PLA-PEG-based MPs. These values were relatively high and draw parallels with studies published on the encapsulation of aminoglycosides. The MPs provided antimicrobial action against the Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, and Klebsiella pneumoniae bacterial strains. The materials were also comprehensively characterized by the following methods: differential scanning calorimetry; gel permeation chromatography; scanning electron microscopy; Fourier transform infrared spectroscopy-attenuated total reflectance; energy-dispersive X-ray fluorescence; and Brunauer-Emmett-Teller surface area analysis. The findings of this study contribute toward discerning new means for conducting targeted therapy with polar, broad spectrum antibiotics.
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Affiliation(s)
- Marta Glinka
- Department
of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Katerina Filatova
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín 76001, Czech Republic
| | - Justyna Kucińska-Lipka
- Department
of Polymers Technology, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Eva Domincova Bergerova
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín 76001, Czech Republic
| | - Andrzej Wasik
- Department
of Analytical Chemistry, Faculty of Chemistry, Gdańsk University of Technology, G. Narutowicza 11/12, Gdańsk 80-233, Poland
| | - Vladimir Sedlařík
- Centre
of Polymer Systems, University Institute, Tomas Bata University in Zlín, Tomáše Bati 5678, Zlín 76001, Czech Republic
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Design and characterization of digluconate and diacetate chlorhexidine loaded-PLGA microparticles for dental applications. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102361] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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7
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Encapsulation of octenidine hydrochloride into bioresorbable polyesters for extended antimicrobial activity. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109987] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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Guo R, Li K, Qin J, Niu S, Hong W. Development of polycationic micelles as an efficient delivery system of antibiotics for overcoming the biological barriers to reverse multidrug resistance in Escherichia coli. NANOSCALE 2020; 12:11251-11266. [PMID: 32412567 DOI: 10.1039/d0nr01366h] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Highly pathogenic Gram-negative bacteria (G-) are tenacious and pose a serious threat to public health, mainly because of three biological barriers: cell envelope blockages, biofilm protection, and macrophages shelter. One strategy to bypass the biological barriers and consequently achieve a satisfying G- bactericidal effect is to utilize polymeric micelles with superior bacterial recognition and binding capabilities. In the current study, we explored the biological barriers penetration ability of a traditional polycationic micellar system (PP-PEI) based on a copolymer of polylactide-poly (ethylene glycol)-polyethylenimine (PLA5K-PEG2K-PEI2K). Subsequently, tetracycline (TC) with good fluorescence property was encapsulated into the PLA core of the micelle (PP-PEI/TC) through hydrophobic interaction. The combination of a PEI shell and loaded antibiotic drug endowed the polycationic micelles with a greater capacity for killing drug-resistant bacteria, destructing biofilms, and eradicating intracellular bacteria, compared with free TC and micelles without the inoculation of a PEI moiety. Confocal laser scanning microscopy (CLSM) and flow cytometry illustrated that PP-PEI/TC could completely penetrate and accumulate in drug-resistant E. coli, biofilms, and infected macrophages. The efficient biological barrier penetration was elucidated as due to the strong electrostatic interactions between the polycationic PEI block and the anionic composition of the bacterial outer membrane (e.g., LPS), macrophage cell membrane (e.g., phospholipid), and extracellular polymeric substances (e.g., eDNA), which was confirmed by biolayer interferometry (BLI). Once the micellar system was bound to a negatively-charged surface, bacterial and cellular enzymes could degrade the PP-PEI core to release its antibacterial content and finally kill planktonic bacteria, bacteria over the depth of a biofilm, and/or intracellular bacteria. In vivo imaging indicated that fluorescent polycationic micelles accumulated in bacterial infection sites with strong fluorescence. In vivo antibacterial experiments showed that PP-PEI/TC could dramatically reduce the number of drug-resistant E. coli EB1-1 in the peritoneal cavity of acute peritonitis BALB/c mice compared with its counterparts. In conclusion, our study demonstrated that polycationic micelles with a PEI shell could penetrate into drug-resistant bacteria, the biofilm matrix, and infected macrophages and lead to the spatiotemporal release of antibacterial agents for the comprehensive treatment of drug-resistant relevant infections.
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Affiliation(s)
- Rong Guo
- School of Pharmacy, the Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Binzhou Medical University, Guanhai Road 346, Yantai, 264003, P. R. China.
| | - Keke Li
- School of Pharmacy, the Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Binzhou Medical University, Guanhai Road 346, Yantai, 264003, P. R. China.
| | - Jing Qin
- Department of Pharmaceutics, School of Pharmacy, Institute of Integrative Medicine, Fudan University, Key Laboratory of Smart Drug Delivery, Ministry of Education, Zhangheng Road 826, Shanghai, 200433, P. R. China
| | - Shengli Niu
- Key laboratory of Zoonosis of Liaoning Province, College of Animal Science and Veterinary Medicine, Shenyang Agricultural University, Dongling Road 120, Shenyang, 110866, P.R. China
| | - Wei Hong
- School of Pharmacy, the Key Laboratory of Prescription Effect and Clinical Evaluation of State Administration of Traditional Chinese Medicine of China, Binzhou Medical University, Guanhai Road 346, Yantai, 264003, P. R. China.
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Liu X, Wang Z, Feng X, Bai E, Xiong Y, Zhu X, Shen B, Duan Y, Huang Y. Platensimycin-Encapsulated Poly(lactic-co-glycolic acid) and Poly(amidoamine) Dendrimers Nanoparticles with Enhanced Anti-Staphylococcal Activity in Vivo. Bioconjug Chem 2020; 31:1425-1437. [DOI: 10.1021/acs.bioconjchem.0c00121] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Xingyun Liu
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
| | - Zhe Wang
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
| | - Xueqiong Feng
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
| | - Enhe Bai
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
| | - Yi Xiong
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discover, Changsha, Hunan 410011, China
| | | | - Yanwen Duan
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discover, Changsha, Hunan 410011, China
- National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan, 410011, China
| | - Yong Huang
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan 410013, China
- National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, Hunan, 410011, China
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Govoni M, Lamparelli EP, Ciardulli MC, Santoro A, Oliviero A, Palazzo I, Reverchon E, Vivarelli L, Maso A, Storni E, Donati ME, Ruspaggiari G, Maffulli N, Fini M, Della Porta G, Dallari D. Demineralized bone matrix paste formulated with biomimetic PLGA microcarriers for the vancomycin hydrochloride controlled delivery: Release profile, citotoxicity and efficacy against S. aureus. Int J Pharm 2020; 582:119322. [PMID: 32298742 DOI: 10.1016/j.ijpharm.2020.119322] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 04/07/2020] [Accepted: 04/08/2020] [Indexed: 12/13/2022]
Abstract
Infection and resulting bone defects caused by Staphylococcus aureus is one of the major issues in orthopaedic surgeries. Vancomycin hydrochloride (VaH) is largely used to manage these events. Here, a human derived bone paste supplemented with biopolymer microcarriers for VaH sustained delivery to merge osteoinductive and antimicrobial actions is described. In detail, different emulsion formulations were tested to fabricate micro-carriers of poly-lactic-co-glycolic acid (PLGA) and hydroxyapatite (HA) by a proprietary technology (named Supercritical Emulsion Extraction). These carriers (mean size 827 ± 68 μm; loading 47 mgVaH/gPLGA) were assembled with human demineralized bone matrix (DBM) to obtain an antimicrobial bone paste system (250 mg/0.5 cm3 w/v, carrier/DBM). Release profiles in PBS indicated a daily drug average release of about 4 µg/mL over two weeks. This concentration was close to the minimum inhibitory concentration and able to effectively inhibit the S. aureus growth in our experimental sets. Carriers cytotoxicity tests showed absence of adverse effects on cell viability at the concentrations used for paste assembly. This approach points toward the potential of the DBM-carrier-antibiotic system in hampering the bacterial growth with accurately controlled antibiotic release and opens perspectives on functional bone paste with PLGA carriers for the controlled release of bioactive molecules.
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Affiliation(s)
- Marco Govoni
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy.
| | - Erwin P Lamparelli
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Via S. Allende, Baronissi (SA), Italy.
| | - Maria C Ciardulli
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Via S. Allende, Baronissi (SA), Italy.
| | - Antonietta Santoro
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Via S. Allende, Baronissi (SA), Italy.
| | - Antonio Oliviero
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Via S. Allende, Baronissi (SA), Italy.
| | - Ida Palazzo
- Department. of Industrial Engineering, University of Salerno, Via G. Paolo II, Fisciano (SA), Italy.
| | - Ernesto Reverchon
- Department. of Industrial Engineering, University of Salerno, Via G. Paolo II, Fisciano (SA), Italy.
| | - Leonardo Vivarelli
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy.
| | - Alessandra Maso
- Laboratory of Microbiology and GMP Quality Control, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano 1/10, 40136 Bologna, Italy.
| | - Elisa Storni
- Laboratory of Microbiology and GMP Quality Control, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano 1/10, 40136 Bologna, Italy.
| | - Maria E Donati
- Laboratory of Microbiology and GMP Quality Control, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano 1/10, 40136 Bologna, Italy.
| | - Gianluca Ruspaggiari
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy.
| | - Nicola Maffulli
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Via S. Allende, Baronissi (SA), Italy.
| | - Milena Fini
- Laboratory of Preclinical and Surgical Studies, IRCCS Istituto Ortopedico Rizzoli, Via Di Barbiano 1/10, 40136 Bologna, Italy.
| | - Giovanna Della Porta
- Department of Medicine, Surgery and Dentistry "Scuola Medica Salernitana", University of Salerno, Via S. Allende, Baronissi (SA), Italy.
| | - Dante Dallari
- Reconstructive Orthopaedic Surgery and Innovative Techniques - Musculoskeletal Tissue Bank, IRCCS Istituto Ortopedico Rizzoli, Via G.C. Pupilli 1, 40136 Bologna, Italy.
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11
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Optimising poly(lactic-co-glycolic acid) microparticle fabrication using a Taguchi orthogonal array design-of-experiment approach. PLoS One 2019; 14:e0222858. [PMID: 31557205 PMCID: PMC6762136 DOI: 10.1371/journal.pone.0222858] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 09/09/2019] [Indexed: 11/20/2022] Open
Abstract
The objective of this study was to identify, understand and generate a Taguchi orthogonal array model for the formation of 10-50 μm microparticles with applications in topical/ocular controlled drug delivery. Poly(lactic-co-glycolic acid) (PLGA) microparticles were fabricated by the single emulsion oil-in-water method and the particle size was characterized using laser diffraction and scanning electronic microscopy (SEM). Sequential Taguchi L12 and L18 orthogonal array (OA) designs were employed to study the influence of ten and eight parameters, respectively, on microparticle size (response). The first optimization step using the L12 design showed that all parameters significantly influenced the particle size of the prepared PLGA microparticles with exception of the concentration of poly(vinyl alcohol) (PVA) in the hardening bath. The smallest mean particle size obtained from the L12 design was 54.39 μm. A subsequent L18 design showed that the molecular weight of PLGA does not significantly affect the particle size. An experimental run comprising of defined parameters including molecular weight of PLGA (89 kDa), concentration of PLGA (20% w/v), concentration of PVA in the emulsion (0.8% w/v), solvent type (ethyl acetate), organic/aqeuous phase ratio (1:1 v/v), vortexing speed (9), vortexing duration (60 seconds), concentration of PVA in hardening bath (0.8% w/v), stirring speed of hardening bath (1200 rpm) and solvent evaporation duration (24 hours) resulted in the lowest mean particle size of 23.51 μm which was predicted and confirmed by the L18 array. A comparable size was demonstrated during the fabrication of BSA-incorporated microparticles. Taguchi OA design proved to be a valuable tool in determining the combination of process parameters that can provide the optimal condition for microparticle formulation. Taguchi OA design can be used to correctly predict the size of microparticles fabricated by the single emulsion process and can therefore, ultimately, save time and costs during the manufacturing process of drug delivery formulations by minimising experimental runs.
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12
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Formulation of Antimicrobial Tobramycin Loaded PLGA Nanoparticles via Complexation with AOT. J Funct Biomater 2019; 10:jfb10020026. [PMID: 31200522 PMCID: PMC6617385 DOI: 10.3390/jfb10020026] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 05/22/2019] [Accepted: 06/10/2019] [Indexed: 01/01/2023] Open
Abstract
Tobramycin is a potent antimicrobial aminoglycoside and its effective delivery by encapsulation within nanoparticle carriers could increase its activity against infections through a combination of sustained release and enhanced uptake. Effective antimicrobial therapy against a clinically relevant model bacteria (Pseudomonas aeruginosa) requires sufficient levels of therapeutic drug to maintain a drug concentration above the microbial inhibitory concentration (MIC) of the bacteria. Previous studies have shown that loading of aminoglycoside drugs in poly(lactic-co-glycolic) acid (PLGA)-based delivery systems is generally poor due to weak interactions between the drug and the polymer. The formation of complexes of tobramycin with dioctylsulfosuccinate (AOT) allows the effective loading of the drug in PLGA-nanoparticles and such nanoparticles can effectively deliver the antimicrobial aminoglycoside with retention of tobramycin antibacterial function.
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Zhu C, Yang H, Shen L, Zheng Z, Zhao S, Li Q, Yu F, Cen L. Microfluidic preparation of PLGA microspheres as cell carriers with sustainable Rapa release. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2019; 30:737-755. [DOI: 10.1080/09205063.2019.1602930] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Chengcheng Zhu
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, Department of Product Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Haibo Yang
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, Department of Product Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Liang Shen
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, Department of Product Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Zhuoyuan Zheng
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, Department of Product Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Shicheng Zhao
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, Department of Product Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
| | - Qingguo Li
- School of Pharmaceutical Sciences, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - Fengbin Yu
- Department of Orthopaedic Surgery, No. 98 Hospital of PLA, Huzhou, China
| | - Lian Cen
- Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, State Key Laboratory of Chemical Engineering, Department of Product Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai, China
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14
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Effect of excipients on encapsulation and release of insulin from spray-dried solid lipid microparticles. Int J Pharm 2018; 550:439-446. [DOI: 10.1016/j.ijpharm.2018.09.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 09/03/2018] [Accepted: 09/05/2018] [Indexed: 01/08/2023]
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Ong YXJ, Lee LY, Davoodi P, Wang CH. Production of drug-releasing biodegradable microporous scaffold using a two-step micro-encapsulation/supercritical foaming process. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.10.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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16
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Martínez-Pérez B, Quintanar-Guerrero D, Tapia-Tapia M, Cisneros-Tamayo R, Zambrano-Zaragoza ML, Alcalá-Alcalá S, Mendoza-Muñoz N, Piñón-Segundo E. Controlled-release biodegradable nanoparticles: From preparation to vaginal applications. Eur J Pharm Sci 2017; 115:185-195. [PMID: 29208486 DOI: 10.1016/j.ejps.2017.11.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2017] [Revised: 11/24/2017] [Accepted: 11/30/2017] [Indexed: 12/31/2022]
Abstract
This study aimed to prepare poly (d,l-lactide-co-glycolide) (PLGA) nanoparticles (NPs) with chitosan (CTS) surface modification to be used as a vaginal delivery system for antimycotic drugs. Clotrimazole was encapsulated with entrapment efficiencies of 86.1 and 68.9% into Clotrimazole-PLGA-NPs (CLT-PLGA-NPs) and PLGA-NPs with CTS-modified surface (CLT-PLGA-CTS-NPs), respectively. The later NPs exhibited a larger size and higher positive zeta potential (Z potential) in comparison to unmodified NPs. In vitro release kinetic studies indicated that Clotrimazole was released in percentages of >98% from both nanoparticulate systems after 18days. Antifungal activity and mucoadhesive properties of NPs were enhanced when CTS was added onto the surface. In summary, these results suggested that Clotrimazole loaded into PLGA-CTS-NPs has great potential for vaginal applications in treating vaginal infections generated by Candida albicans.
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Affiliation(s)
- Beatriz Martínez-Pérez
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores Cuautitlán (FES-Cuautitlán), Laboratorio de Sistemas Farmacéuticos de Liberación Modificada, Km. 2.5 Carretera Cuautitlán-Teoloyucan, San Sebastián Xhala, C.P. 54714 Cuautitlán Izcalli, Edo. de México, Mexico
| | - David Quintanar-Guerrero
- UNAM, FES-Cuautitlán, Laboratorio de Posgrado en Tecnología Farmacéutica, Av. 1o de mayo s/n, C.P. 54740 Cuautitlán Izcalli, Edo. de México, Mexico
| | - Melina Tapia-Tapia
- Centro Conjunto de Investigación Química Sustentable UAEM-UNAM (CCIQS), Carretera Toluca-Atlacomulco Km. 14.5, Unidad San Cayetano, C.P. 50200 Toluca, Edo. de México, Mexico
| | - Ricardo Cisneros-Tamayo
- Universidad Politécnica del Valle de México, División de Ingeniería en Nanotecnología, Av. Mexiquense s/n, esq. Universidad Politécnica, Col. Villa Esmeralda, C.P. 54910 Tultitlán, Edo. de México, Mexico
| | - María L Zambrano-Zaragoza
- UNAM, FES-Cuautitlán, Laboratorio de Procesos de Transformación y Tecnologías Emergentes en Alimentos, Km. 2.5 Carretera Cuautitlán-Teoloyucan, San Sebastián Xhala, C.P. 54714 Cuautitlán Izcalli, Edo. de México, Mexico
| | - Sergio Alcalá-Alcalá
- Universidad Autónoma del Estado de Morelos, Facultad de Farmacia, Av. Universidad 1001, Col. Chamilpa, C.P. 62209 Cuernavaca, Morelos, Mexico
| | - Néstor Mendoza-Muñoz
- Universidad de Colima, Facultad de Ciencias Químicas, Laboratorio de Farmacia, Carretera Colima-Coquimatlán Km. 9, C.P. 28400 Coquimatlán, Colima, Mexico
| | - Elizabeth Piñón-Segundo
- Universidad Nacional Autónoma de México (UNAM), Facultad de Estudios Superiores Cuautitlán (FES-Cuautitlán), Laboratorio de Sistemas Farmacéuticos de Liberación Modificada, Km. 2.5 Carretera Cuautitlán-Teoloyucan, San Sebastián Xhala, C.P. 54714 Cuautitlán Izcalli, Edo. de México, Mexico.
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Cruz J, Flórez J, Torres R, Urquiza M, Gutiérrez JA, Guzmán F, Ortiz CC. Antimicrobial activity of a new synthetic peptide loaded in polylactic acid or poly(lactic-co-glycolic) acid nanoparticles against Pseudomonas aeruginosa, Escherichia coli O157:H7 and methicillin resistant Staphylococcus aureus (MRSA). NANOTECHNOLOGY 2017; 28:135102. [PMID: 28266350 DOI: 10.1088/1361-6528/aa5f63] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Nanocarrier systems are currently being developed for peptide, protein and gene delivery to protect them in the blood circulation and in the gastrointestinal tract. Polylactic acid (PLA) and poly(lactic-co-glycolic) acid (PLGA) nanoparticles loaded with a new antimicrobial GIBIM-P5S9K peptide were obtained by the double emulsion solvent extraction/evaporation method. PLA- and PLGA-NPs were spherical with sizes between 300 and 400 nm for PLA and 200 and 300 nm for PLGA and <0.3 polydispersity index as determined by dynamic light scattering and scanning electron microscopy), having the zeta potential of >20 mV. The peptide-loading efficiency of PLA-NP and PLGA-NPs was 75% and 55%, respectively. PLA- and PLGA-NPs released around 50% of this peptide over 8 h. In 10% human sera the size of peptide loaded PLA- and PLGA-NPs increased between 25.2% and 39.3%, the PDI changed from 3.2 to 5.1 and the surface charge from -7.15 to 14.6 mV. Both peptide loaded PLA- and PLGA-NPs at 0.5 μM peptide concentration inhibited the growth of Escherichia coli O157:H7 (E. coli O157:H7), methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas. aeruginosa (P. aeruginosa). In contrast, free peptide inhibited at 10 μM but did not inhibit at 0.5 and 1 μM. These PLA- and PLGA-NPs presented <10% hemolysis indicating that they are hemocompatible and promising for delivery and protection system of GIBIM-P5S9K peptide.
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Affiliation(s)
- J Cruz
- Escuela de Química, Facultad de Ciencias, Universidad Industrial de Santander, Cra 27 # calle 9 (CP680002) Bucaramanga, Colombia. Departamento de Química, Universidad Nacional de Colombia, Cra 30 # 45-03, 111321 Bogotá, Colombia
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Rauta PR, Das NM, Nayak D, Ashe S, Nayak B. Enhanced efficacy of clindamycin hydrochloride encapsulated in PLA/PLGA based nanoparticle system for oral delivery. IET Nanobiotechnol 2017; 10:254-61. [PMID: 27463797 DOI: 10.1049/iet-nbt.2015.0021] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Clindamycin hydrochloride (CLH) is a clinically important oral antibiotic with wide spectrum of antimicrobial activity that includes gram-positive aerobes (staphylococci, streptococci etc.), most anaerobic bacteria, Chlamydia and certain protozoa. The current study was focused to develop a stabilised clindamycin encapsulated poly lactic acid (PLA)/poly (D,L-lactide-co-glycolide) (PLGA) nano-formulation with better drug bioavailability at molecular level. Various nanoparticle (NPs) formulations of PLA and PLGA loaded with CLH were prepared by solvent evaporation method varying drug: polymer concentration (1:20, 1:10 and 1:5) and characterised (size, encapsulation efficiency, drug loading, scanning electron microscope, differential scanning calorimetry [DSC] and Fourier transform infrared [FTIR] studies). The ratio 1:10 was found to be optimal for a monodispersed and stable nano formulation for both the polymers. NP formulations demonstrated a significant controlled release profile extended up to 144 h (both CLH-PLA and CLH-PLGA). The thermal behaviour (DSC) studies confirmed the molecular dispersion of the drug within the system. The FTIR studies revealed the intactness as well as unaltered structure of drug. The CLH-PLA NPs showed enhanced antimicrobial activity against two pathogenic bacteria Streptococcus faecalis and Bacillus cereus. The results notably suggest that encapsulation of CLH into PLA/PLGA significantly increases the bioavailability of the drug and due to this enhanced drug activity; it can be widely applied for number of therapies.
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Affiliation(s)
- Pradipta Ranjan Rauta
- Immunology and Molecular Medicine Lab, Department of Life Science, National Institute of Technology Rourkela, Odisha 769008, India
| | - Niladri Mohan Das
- Immunology and Molecular Medicine Lab, Department of Life Science, National Institute of Technology Rourkela, Odisha 769008, India
| | - Debasis Nayak
- Immunology and Molecular Medicine Lab, Department of Life Science, National Institute of Technology Rourkela, Odisha 769008, India
| | - Sarbani Ashe
- Immunology and Molecular Medicine Lab, Department of Life Science, National Institute of Technology Rourkela, Odisha 769008, India
| | - Bismita Nayak
- Immunology and Molecular Medicine Lab, Department of Life Science, National Institute of Technology Rourkela, Odisha 769008, India.
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Design and evaluation of antibiotic releasing self- assembled scaffolds at room temperature using biodegradable polymer particles. Int J Pharm 2017; 520:284-296. [PMID: 28185962 DOI: 10.1016/j.ijpharm.2017.01.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Revised: 01/31/2017] [Accepted: 01/31/2017] [Indexed: 01/02/2023]
Abstract
Biodegradable polymer-based drug-eluting implants offer many advantages such as predictable drug release kinetics, safety, and acceptable drug loading under ambient conditions. Herein, we describe fabrication and evaluation of antibiotic loaded scaffolds for localized delivery and tissue engineering applications. PDLLA particles entrapping gentamycin were formulated using solvent evaporation method and used for scaffold fabrication. Optimization of formulation parameters such as pH of the internal aqueous phase and combination of excipients like glycerol, polyvinyl alcohol (PVA) resulted in high entrapment efficiencies up to 96% of gentamicin in particles with drug load of 16-18μg/mg of polymer particles. These microparticles were fused in presence of methanol at ambient temperatures to form scaffolds of different geometry having reasonable mechanical strength. Porosity of these scaffolds was found to be more than 80%. Antibiotic released from the scaffolds was found to be bioactive as tested against Staphylococcus aureus and the release pattern was biphasic over a period of one week. The scaffolds were found to be non-toxic to murine fibroblasts cultures in vitro as well as to mice upon subcutaneous implantation. This method provides a novel and easy way of fabricating antibiotic loaded polymer scaffolds for varieties of applications.
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20
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ter Boo GJA, Richards RG, Moriarty TF, Grijpma DW, Eglin D. Hyaluronic acid derivatives and its polyelectrolyte complexes with gentamicin as a delivery system for antibiotics. POLYM ADVAN TECHNOL 2016. [DOI: 10.1002/pat.3915] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Gert-Jan A. ter Boo
- AO Research Institute Davos; AO Foundation; Clavadelerstrasse 8 CH7270 Davos Switzerland
- Department of Biomaterials Science and Technology; University of Twente; P.O. Box 217 7500 Enschede the Netherlands
| | - Robert G. Richards
- AO Research Institute Davos; AO Foundation; Clavadelerstrasse 8 CH7270 Davos Switzerland
| | - Thomas F. Moriarty
- AO Research Institute Davos; AO Foundation; Clavadelerstrasse 8 CH7270 Davos Switzerland
| | - Dirk W. Grijpma
- Department of Biomaterials Science and Technology; University of Twente; P.O. Box 217 7500 Enschede the Netherlands
- Department of Biomedical Engineering, W.J. Kolff Institute, UMC Groningen; University of Groningen; Hanzeplein 1 9713 GZ Groningen the Netherlands
| | - David Eglin
- AO Research Institute Davos; AO Foundation; Clavadelerstrasse 8 CH7270 Davos Switzerland
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21
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Della Porta G, Campardelli R, Cricchio V, Oliva F, Maffulli N, Reverchon E. Injectable PLGA/Hydroxyapatite/Chitosan Microcapsules Produced by Supercritical Emulsion Extraction Technology: An In Vitro Study on Teriparatide/Gentamicin Controlled Release. J Pharm Sci 2016; 105:2164-72. [DOI: 10.1016/j.xphs.2016.05.002] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2016] [Revised: 04/28/2016] [Accepted: 05/03/2016] [Indexed: 02/01/2023]
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22
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Khan AA, Jabeen M, Alanazi AM, Khan AA. Antifungal efficacy of amphotericin B encapsulated fibrin microsphere for treating Cryptococcus neoformans infection in Swiss albino mice. Braz J Infect Dis 2016; 20:342-8. [PMID: 27294976 PMCID: PMC9427606 DOI: 10.1016/j.bjid.2016.04.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2015] [Revised: 03/28/2016] [Accepted: 04/04/2016] [Indexed: 11/17/2022] Open
Abstract
A natural and biocompatible fibrin microsphere is one of the most promising dual delivery vehicle as compared to other traditionally designed delivery modalities. It represents sustained delivery of encapsulated drug and is easily biodegradable in the blood circulation. In the present study, we evaluated the systemic augmentation of the antifungal activity of amphotericin B loaded in fibrin microsphere (AMB-fibrin microsphere) against cryptococcosis in Swiss albino mice. Mice infected with Cryptococcus neoformans were treated with 0.5mg/kg AMB-fibrin microsphere that was given alternately for 7 days. The antifungal potential of AMB-fibrin microsphere was assessed on the basis of reduction of cfu count in the systemic circulation and various vital organs of infected mice. The formulation was found to be highly effective in reducing intracellular pathogen from the experimental animals where fibrin microsphere significantly controlled the release of amphotericin B for longer time duration. The AMB-fibrin microsphere chemotherapy was significantly more effective than free amphotericin B in reducing the fungal burden and showed better survival efficacy (p<0.05). The current study demonstrating the use of novel amphotericin B loaded fibrin microsphere not only imparts protection to the encapsulated amphotericin B but also offers an effective strategy to decrease the drug associated toxicities.
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Affiliation(s)
- Azmat Ali Khan
- King Saud University, College of Pharmacy, Department of Pharmaceutical Chemistry, Pharmaceutical Biotechnology Laboratory, Riyadh, Saudi Arabia.
| | - Mumtaz Jabeen
- Aligarh Muslim University, Department of Zoology, Section of Genetics, Aligarh, India
| | - Amer M Alanazi
- King Saud University, College of Pharmacy, Department of Pharmaceutical Chemistry, Pharmaceutical Biotechnology Laboratory, Riyadh, Saudi Arabia
| | - Abdul Arif Khan
- King Saud University, College of Pharmacy, Department of Pharmaceutics, Riyadh, Saudi Arabia
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Three-dimensional printing of antibiotics-loaded poly-ε-caprolactone/poly(lactic-co-glycolic acid) scaffolds for treatment of chronic osteomyelitis. Tissue Eng Regen Med 2015. [DOI: 10.1007/s13770-015-0014-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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24
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McManamon C, de Silva JP, Delaney P, Morris MA, Cross GLW. Characteristics, interactions and coating adherence of heterogeneous polymer/drug coatings for biomedical devices. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 59:102-108. [PMID: 26652354 DOI: 10.1016/j.msec.2015.09.103] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Revised: 09/28/2015] [Accepted: 09/29/2015] [Indexed: 11/25/2022]
Abstract
With this rise in surgical procedures it is important to focus on the mobility and safety of the patient and reduce the infections that are associated with hip replacements. We examine the mechanical properties of gentamicin sulphate as a model antimicrobial layer for titanium-alloy based prosthetic hips to help prevent methicillin-resistant Staphylococcus aureus infection after surgery. A top layer of poly(lactic-co-glycolic acid) is added to maintain the properties of the gentamicin sulphate as well as providing a drug delivery system. Through the use of nanoindentation and micro-scratch techniques it is possible to determine the mechanical and adhesive properties of this system. Nanoindentation determined the modulus values for the poly(lactic-co-glycolic acid) and gentamicin sulphate materials to be 8.9 and 5.2GPa, respectively. Micro-scratch established that the gentamicin sulphate layer is strongly adhered to the Ti alloy and forces of 30N show no cohesive or adhesive failure. It was determined that the poly(lactic-co-glycolic acid) is ductile in nature and delaminates from the gentamicin sulphate layer of at 0.5N.
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Affiliation(s)
- Colm McManamon
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland
| | - Johann P de Silva
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland; School of Physics, Trinity College Dublin, Dublin 2, Ireland
| | - Paul Delaney
- Department of Chemistry, Supercritical Fluid Centre and Materials Section, University College Cork, Cork, Ireland
| | - Michael A Morris
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland; Department of Chemistry, Supercritical Fluid Centre and Materials Section, University College Cork, Cork, Ireland
| | - Graham L W Cross
- Centre for Research on Adaptive Nanostructures and Nanodevices (CRANN), Trinity College Dublin, Dublin 2, Ireland; School of Physics, Trinity College Dublin, Dublin 2, Ireland.
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Rauta PR, Nayak B. Parenteral immunization of PLA/PLGA nanoparticle encapsulating outer membrane protein (Omp) from Aeromonas hydrophila: Evaluation of immunostimulatory action in Labeo rohita (rohu). FISH & SHELLFISH IMMUNOLOGY 2015; 44:287-294. [PMID: 25689492 DOI: 10.1016/j.fsi.2015.02.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/01/2015] [Accepted: 02/06/2015] [Indexed: 06/04/2023]
Abstract
Advanced vaccine research approaches needs to explore on biodegradable nanoparticles (NPs) based vaccine carrier that can serve as antigen delivery systems as well as immuno-stimulatory action to induce both innate and adaptive immune response in fish. Immunogenicity of PLA and PLGA NPs encapsulating outer membrane protein (Omp) antigen of Aeromonas hydrophila were evaluated through intra-peritoneal injection in fish, Labeo rohita. Antigen loaded PLA-Omp (223.5 ± 13.19 nm) and PLGA-Omp (166.4 ± 21.23 nm) NPs were prepared using double emulsion method by efficiently encapsulating the antigen reaching the encapsulation efficiency 44 ± 4.58% and 59.33 ± 5.13% respectively. Our formulated PLA Omp and PLGA-Omp NPs were in nanometer range (<500 nm) and could be successfully endocyted in the body. Despite low antigen loading in PLA-Omp, it showed considerably slower antigen release in vitro than PLGA-Omp NPs. Other physical properties like zetapotential values and poly dispersity index (PDI) confirmed the stability as well as monodisperse nature of the formulated nanoparticles. The spherical and isolated nature of PLA-Omp and PLGA-Omp NPs were revealed by SEM analysis. Upon immunization of all antigenic formulations (PLA-Omp NP, PLGA-Omp NP, FIA-Omp, PLA NP, PLGA NP, PBS as control), significant higher bacterial agglutination titre and haemolytic activity were observed in case of PLA-Omp and PLGA-Omp immunized groups than rest groups at both 21 days and 42 days. The specific antibody response was significantly increased and persisted up to 42 days of post immunization by PLA-Omp, PLGA-Omp, FIA-Omp. PLA-Omp NPs showed better immune response (higher bacterial agglutination titre, haemolytic activity, specific antibody titre, higher percent survival upon A. hydrophila challenge) than PLGA-Omp in L. rohita confirming its better efficacy. Comparable antibody response of PLA-Omp and PLGA-Omp with FIA-Omp treated groups suggested that PLA and PLGA could be replacement for Freund's adjuvant (for stimulating antibody response) to overcome many side effects offering long lasting immunity. Our encouraging results suggest that PLA/PLGA nanoparticles based delivery system could be a novel antigen carrier for parenteral immunization in fish.
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Affiliation(s)
- Pradipta Ranjan Rauta
- Immunology and Molecular Medicine Laboratory, Department of Life Science, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Bismita Nayak
- Immunology and Molecular Medicine Laboratory, Department of Life Science, National Institute of Technology, Rourkela, Odisha 769008, India.
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Vilos C, Velasquez LA, Rodas PI, Zepeda K, Bong SJ, Herrera N, Cantin M, Simon F, Constandil L. Preclinical Development and In Vivo Efficacy of Ceftiofur-PLGA Microparticles. PLoS One 2015; 10:e0123335. [PMID: 25915043 PMCID: PMC4410948 DOI: 10.1371/journal.pone.0123335] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 03/02/2015] [Indexed: 11/25/2022] Open
Abstract
Drug delivery systems based on polymeric microparticles represent an interesting field of development for the treatment of several infectious diseases for humans and animals. In this work, we developed PLGA microparticles loaded with ceftiofur (PLGA-cef), a third- generation cephalosporin that is used exclusively used in animals. PLGA-cef was prepared by the double emulsion w/o/w method, and exhibited a diameter in the range of 1.5–2.2 μm, and a negative ζ potential in the range of -35 to -55 mV. The loading yield of PLGA-cef was ~7% and encapsulation efficiency was approximately 40%. The pharmacokinetic study demonstrated a sustained release profile of ceftiofur for 20 days. PLGA-cef administrated in a single dose was more effective than ceftiofur non-encapsulated in rats challenged with S. Typhimurium. The in vivo toxicological evaluation showed that PLGA-cef did not affect the blood biochemical, hematological and hemostasis parameters. Overall, the PLGA-cef showed slow in vivo release profile, high antibacterial efficacy, and low toxicity. The results obtained supports the safe application of PLGA-cef as sustained release platform in the veterinary industry.
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Affiliation(s)
- Cristian Vilos
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andres Bello, Facultad de Medicina, Santiago, Chile
- Centro para el Desarrollo de la Nanociencia y Nanotecnología, (CEDENNA). Universidad de Santiago de Chile, Santiago, Chile
| | - Luis A. Velasquez
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andres Bello, Facultad de Medicina, Santiago, Chile
- Centro para el Desarrollo de la Nanociencia y Nanotecnología, (CEDENNA). Universidad de Santiago de Chile, Santiago, Chile
| | - Paula I. Rodas
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andres Bello, Facultad de Medicina, Santiago, Chile
| | - Katherine Zepeda
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andres Bello, Facultad de Medicina, Santiago, Chile
| | - Soung-Jae Bong
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andres Bello, Facultad de Medicina, Santiago, Chile
| | - Natalia Herrera
- Center for Integrative Medicine and Innovative Science (CIMIS), Universidad Andres Bello, Facultad de Medicina, Santiago, Chile
| | - Mario Cantin
- CIMA, Department of Integral Dentistry, Faculty of Dentistry, Universidad de La Frontera, Temuco, Chile
- Center of Research in Biomedical Sciences, Universidad Autónoma de Chile, Temuco, Chile
| | - Felipe Simon
- Laboratorio de Fisiopatología Integrativa, Departamento de Ciencias Biológicas, Facultad de Ciencias Biológicas and Facultad de Medicina, Universidad Andrés Bello, Santiago, Chile
| | - Luis Constandil
- Centro para el Desarrollo de la Nanociencia y Nanotecnología, (CEDENNA). Universidad de Santiago de Chile, Santiago, Chile
- Laboratorio de Neurobiología, Departamento de Biología, Facultad de Química y Biología, Universidad de Santiago de Chile, Santiago, Chile
- * E-mail:
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Gupta I, Sehgal R, Kanwar RK, Punj V, Kanwar JR. Nanocapsules loaded with iron-saturated bovine lactoferrin have antimicrobial therapeutic potential and maintain calcium, zinc and iron metabolism. Nanomedicine (Lond) 2014; 10:1289-314. [PMID: 25442715 DOI: 10.2217/nnm.14.209] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
AIM This study aimed to evaluate the potential antimicrobial efficacy of alginate gel-encapsulated ceramic nanocarriers loaded with iron-saturated bovine lactoferrin (Fe-bLf) nanocarriers/nanocapsules (AEC-CP-Fe-bLf NCs). MATERIALS & METHODS The antimicrobial activities of non-nanoformulated apo (iron free), Fe-bLf and native forms of Australian bLf against pathogenic Salmonella typhimurium (wild strain) were studied in vitro. The efficacy of AEC-CP-Fe-bLf NCs were checked in vivo using Balb/c mice model. RESULTS The study revealed that native bLf is more effective in combating infection than the conventional drug ciprofloxacin (0.4 mg/ml). The efficacy of the drug was also revealed in vivo when BALB/c mice that, after being challenged with S. typhimurium (200 μl of 10(8) CFU/ml suspension), were fed orally with a nanoformulated bLf diet and the infection was observed to be eliminated. However, chronic infection developed in the group of infected mice that did not receive any drug treatment, as well as the mice treated with ciprofloxacin. The immune response to bacterial infection and to various drug treatments thereafter was studied in the mice. CONCLUSION The study concludes that bLf and nanoformulated Fe-bLf are more effective in the treatment of Salmonella-infected mice than ciprofloxacin.
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Affiliation(s)
- Isha Gupta
- Nanomedicine-Laboratory of Immunology & Molecular Biomedical Research (NLIMBR), Molecular & Medical Research (MMR) Strategic Research Centre, School of Medicine (SoM), Faculty of Health, Deakin University, Waurn Ponds, VIC 3217, Australia
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Ryu TK, Kim SE, Kim JH, Moon SK, Choi SW. Biodegradable uniform microspheres based on solid-in-oil-in-water emulsion for drug delivery: A comparison of homogenization and fluidic device. J BIOACT COMPAT POL 2014. [DOI: 10.1177/0883911514544011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Based on solid-in-oil-in-water emulsification, we fabricated biodegradable poly(ϵ-caprolactone) microspheres containing gentamicin using conventional homogenization and a fluidic device. The feasibility of the poly(ϵ-caprolactone) microspheres as drug carriers was evaluated in terms of encapsulation efficiency, release behavior of gentamicin, and antimicrobial activity. The poly(ϵ-caprolactone) microspheres prepared using a fluidic device (fluidic device microspheres) had a uniform diameter and a smooth surface, whereas the poly(ϵ-caprolactone) microspheres prepared using conventional homogenization (conventional homogenization microspheres) exhibited polydisperse and a porous structure. At 0.3 wt% of gentamicin concentration, the encapsulation efficiencies of the conventional homogenization and fluidic device microspheres were 39.5% and 72.0%, respectively. In addition, a significant amount of gentamicin was only released initially from the conventional homogenization microspheres, whereas the fluidic device microspheres released gentamicin in a sustained manner for 28 days. These results confirmed the superior performances of the uniform fluidic device microspheres for drug delivery system. We further proposed a model for microsphere formation to explain the difference in performance of the conventional homogenization and fluidic device microspheres.
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Affiliation(s)
- Tae-Kyung Ryu
- Department of Biotechnology, The Catholic University of Korea, Bucheon, Republic of Korea
| | - Sung Eun Kim
- Department of Orthopedic Surgery and Rare Diseases Institute, Korea University Medical College, Seoul, Republic of Korea
| | - Joo-Hwan Kim
- Department of Biotechnology, The Catholic University of Korea, Bucheon, Republic of Korea
| | - Seung-Kwan Moon
- Department of Biotechnology, The Catholic University of Korea, Bucheon, Republic of Korea
| | - Sung-Wook Choi
- Department of Biotechnology, The Catholic University of Korea, Bucheon, Republic of Korea
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Effects of antibiotic physicochemical properties on their release kinetics from biodegradable polymer microparticles. Pharm Res 2014; 31:3379-89. [PMID: 24874603 DOI: 10.1007/s11095-014-1427-y] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Accepted: 05/12/2014] [Indexed: 02/07/2023]
Abstract
PURPOSE This study investigated the effects of the physicochemical properties of antibiotics on the morphology, loading efficiency, size, release kinetics, and antibiotic efficacy of loaded poly(DL-lactic-co-glycolic acid) (PLGA) microparticles (MPs) at different loading percentages. METHODS Cefazolin, ciprofloxacin, clindamycin, colistin, doxycycline, and vancomycin were loaded at 10 and 20 wt% into PLGA MPs using a water-in-oil-in water double emulsion fabrication protocol. Microparticle morphology, size, loading efficiency, release kinetics, and antibiotic efficacy were assessed. RESULTS The results from this study demonstrate that the chemical nature of loaded antibiotics, especially charge and molecular weight, influence the incorporation into and release of antibiotics from PLGA MPs. Drugs with molecular weights less than 600 Da displayed biphasic release while those with molecular weights greater than 1,000 Da displayed triphasic release kinetics. Large molecular weight drugs also had a longer delay before release than smaller molecular weight drugs. The negatively charged antibiotic cefazolin had lower loading efficiency than positively charged antibiotics. Microparticle size appeared to be mainly controlled by fabrication parameters, and partition and solubility coefficients did not appear to have an obvious effect on loading efficiency or release. Released antibiotics maintained their efficacy against susceptible strains over the duration of release. Duration of release varied between 17 and 49 days based on the type of antibiotic loaded. CONCLUSIONS The data from this study indicate that the chemical nature of antibiotics affects properties of antibiotic-loaded PLGA MPs and allows for general prediction of loading and release kinetics.
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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.
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Affiliation(s)
- Sheetal R D'Mello
- Department of Pharmaceutical Sciences & Experimental Therapeutics, College of Pharmacy, University of Iowa , Iowa City, IA , USA and
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Larrañaga A, Sarasua JR. Effect of bioactive glass particles on the thermal degradation behaviour of medical polyesters. Polym Degrad Stab 2013. [DOI: 10.1016/j.polymdegradstab.2012.12.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Sagiri SS, Sethy J, Pal K, Banerjee I, Pramanik K, Maiti TK. Encapsulation of vegetable organogels for controlled delivery applications. Des Monomers Polym 2012. [DOI: 10.1080/15685551.2012.747154] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
Affiliation(s)
- Sai Sateesh Sagiri
- a Soft Materials & Medical Instrumentation Laboratory, Department of Biotechnology & Medical Engineering , National Institute of Technology , Rourkela-769008, Odisha , India
| | - Jyotirmoy Sethy
- a Soft Materials & Medical Instrumentation Laboratory, Department of Biotechnology & Medical Engineering , National Institute of Technology , Rourkela-769008, Odisha , India
| | - Kunal Pal
- a Soft Materials & Medical Instrumentation Laboratory, Department of Biotechnology & Medical Engineering , National Institute of Technology , Rourkela-769008, Odisha , India
| | - Indranil Banerjee
- b Tissue Engineering Group, Department of Biotechnology & Medical Engineering , National Institute of Technology , Rourkela-769008, Odisha , India
| | - Krishna Pramanik
- b Tissue Engineering Group, Department of Biotechnology & Medical Engineering , National Institute of Technology , Rourkela-769008, Odisha , India
| | - Tapas K. Maiti
- c Department of Biotechnology , Indian Institute of Technology , WB-721302, Kharagpur , India
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Wei Y, Wang YX, Wang W, Ho SV, Qi F, Ma GH, Su ZG. Microcosmic mechanisms for protein incomplete release and stability of various amphiphilic mPEG-PLA microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:13984-13992. [PMID: 22937802 DOI: 10.1021/la3017112] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The microcosmic mechanisms of protein (recombinant human growth hormone, rhGH) incomplete release and stability from amphiphilic poly(monomethoxypolyethylene glycol-co-D,L-lactide) (mPEG-PLA, PELA) microspheres were investigated. PELA with different hydrophilicities (PELA-1, PELA-2, and PELA-3) based on various ratios of mPEG to PLA were employed to prepare microspheres exhibiting a narrow size distribution using a combined double emulsion and premix membrane emulsification method. The morphology, rhGH encapsulation efficiency, in vitro release profile, and rhGH stability of PELA microspheres during the release were characterized and compared in detail. It was found that increasing amounts of PLA enhanced the encapsulation efficiency of PELA microspheres but reduced both the release rate of rhGH and its stability. Contact angle, atomic force microscope (AFM), and quartz crystal microbalance with dissipation (QCM-D) techniques were first combined to elucidate the microcosmic mechanism of incomplete release by measuring the hydrophilicity of the PELA film and its interaction with rhGH. In addition, the pH change within the microsphere microenvironment was monitored by confocal laser scanning microscopy (CLSM) employing a pH-sensitive dye, which clarified the stability of rhGH during the release. These results suggested that PELA hydrophilicity played an important role in rhGH incomplete release and stability. Thus, the selection of suitable hydrophilic polymers with adequate PEG lengths is critical in the preparation of optimum protein drug sustained release systems. This present work is a first report elucidating the microcosmic mechanisms responsible for rhGH stability and its interaction with the microspheres. Importantly, this research demonstrated the application of promising new experimental methods in investigating the interaction between biomaterials and biomacromolecules, thus opening up a range of exciting potential applications in the biomedical field including drug delivery and tissue regeneration.
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Affiliation(s)
- Yi Wei
- National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing, PR China
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Khan AA, Jabeen M, Chauhan A, Owais M. Vaccine potential of cytosolic proteins loaded fibrin microspheres of Cryptococcus neoformans in BALB/c mice. J Drug Target 2012; 20:453-66. [PMID: 22553959 DOI: 10.3109/1061186x.2012.685474] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Cryptococcosis is a leading mycological cause of mortality among immunologically compromised individuals. In order to develop an effective vaccine against Cryptococcus neoformans, the cytosolic proteins (Cp) of the pathogen have been used as an antigen in combination with different formulations. In the present study, we have demonstrated that Cp encapsulated poly-lactide co-glycolide (PLGA) microsphere further co-encapsulated into the biocompatible fibrin cross-linked plasma beads (Fib-PLGA-Cp) mediated cytosolic delivery elicited strong immune response in the BALB/c mice. In contrast, other formulations of Cp failed to impart significant level of protection. The immune response, involved with Fib-PLGA-Cp protection, appear to interact with the target cells by both endocytosis as well as membrane fusion mode, thus helping in the activation of both CD4(+) and CD8(+) T-cells. Analysis of cytokine profiles in immunized animals revealed that the protective response was associated with the Th1/Th2 polarization in favor of type-1 cytokine [interferons (IFN)-γ and interleukin (IL)-2] cells. Furthermore, vaccination with Fib-PLGA-Cp elicited high immunoglobulin (Ig) G(l) and IgG(2a) isotype response; successfully cleared fungal burden in vital organs and also increased the survival rate of immunized animals. Altogether the present study is a clear indicative of the possible use of fibrin microsphere-based targeted delivery of cytosolic proteins to induce protective immune responses against experimental murine cryptococcosis.
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Affiliation(s)
- Azmat Ali Khan
- Interdisciplinary Biotechnology Unit, Aligarh Muslim University, Aligarh, India.
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Ranjan A, Pothayee N, Seleem MN, Boyle SM, Kasimanickam R, Riffle JS, Sriranganathan N. Nanomedicine for intracellular therapy. FEMS Microbiol Lett 2012; 332:1-9. [DOI: 10.1111/j.1574-6968.2012.02566.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 03/09/2012] [Accepted: 03/26/2012] [Indexed: 12/29/2022] Open
Affiliation(s)
- Ashish Ranjan
- Radiology and Imaging Sciences; National Institutes of Health; Bethesda; MD; USA
| | - Nikorn Pothayee
- Macromolecules and Interfaces Institute; Virginia Tech; Blacksburg; VA; USA
| | - Mohamed N. Seleem
- Department of Comparative Pathobiology; Purdue University; West Lafayette; IN; USA
| | - Stephen M. Boyle
- Department of Biomedical Sciences and Pathobiology; Virginia Tech; Blacksburg; VA; USA
| | | | - Judy S. Riffle
- Macromolecules and Interfaces Institute; Virginia Tech; Blacksburg; VA; USA
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Yan N, Zhang X, Cai Q, Yang X, Zhou X, Wang B, Deng X. The Effects of Lactidyl/Glycolidyl Ratio and Molecular Weight of Poly(D,L -Lactide-co-Glycolide) on the Tetracycline Entrapment and Release Kinetics of Drug-Loaded Nanofibers. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 23:1005-19. [PMID: 21477461 DOI: 10.1163/092050611x568223] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Affiliation(s)
- Na Yan
- a Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Xuehui Zhang
- b Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Qing Cai
- c The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Xiaoping Yang
- d The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Xuegang Zhou
- e The Key Laboratory of Beijing City on Preparation and Processing of Novel Polymer Materials, Beijing University of Chemical Technology, Beijing 100029, P. R. China
| | - Bo Wang
- f Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China
| | - Xuliang Deng
- g Department of Geriatric Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, P. R. China.
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Mile B, Valerija K, Krsto G, Ivan V, Ilir D, Nikola L. Doxycycline-rifampin versus doxycycline-rifampin-gentamicin in treatment of human brucellosis. Trop Doct 2012; 42:13-7. [DOI: 10.1258/td.2011.110284] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
This prospective, non-randomized trial, compared the efficacy and tolerance of a doxycycline-rifampin regimen, administered for 45 days, versus doxycycline-rifampin given for 45 days plus gentamicin for the first 7–10 days, in the treatment of human brucellosis. Of 238 patients that were initially included in the study, 181 were finally evaluated. Ninety-four were treated with the doxycycline-rifampin and 87 with the doxycycline-rifampin-gentamicin regimens. In the doxycycline-rifampin group: relapses were noted in 13 (13.8%) patients; therapeutic failures in five (5.3%); and mild adverse effects in 28 (29.8%). In the doxycycline-rifampin-gentamicin group: four (4.6%) relapsed; and five (5.7%) therapeutic failures were registered. Mild adverse effects were registered in 29 (33.3%) patients. The doxycycline-rifampin-gentamicin regimen demonstrated a significantly lower relapse rate compared to the doxycycline-rifampin combination ( P = 0.034). We conclude that adding gentamicin for the first 7–10 days to the standard oral doxycycline-rifampin regimen can decrease the rate of relapses.
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Affiliation(s)
- Bosilkovski Mile
- University Clinic for Infectious Diseases and Febrile Conditions, Skopje
| | - Kirova Valerija
- University Clinic for Infectious Diseases and Febrile Conditions, Skopje
| | - Grozdanovski Krsto
- University Clinic for Infectious Diseases and Febrile Conditions, Skopje
| | - Vidinic Ivan
- University Clinic for Infectious Diseases and Febrile Conditions, Skopje
| | - Demiri Ilir
- University Clinic for Infectious Diseases and Febrile Conditions, Skopje
| | - Labacevski Nikola
- Institute for Clinical Pharmacology, Medical Faculty Skopje, Republic of Macedonia
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Cao F, Ding B, Sun M, Guo C, Zhang L, Zhai G. Lung-targeted delivery system of curcumin loaded gelatin microspheres. Drug Deliv 2011; 18:545-54. [PMID: 21812751 DOI: 10.3109/10717544.2011.595842] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The purpose of the study is to design and evaluate curcumin loaded gelatin microspheres (C-GMS) for effective drug delivery to the lung. C-GMS was prepared by the emulsification-linkage technique and the formulation was optimized by orthogonal design. The mean encapsulation efficiency and drug loading of the optimal C-GMS were 75.5 ± 3.82 % and 6.15 ± 0.44%, respectively. The C-GMS presented a spherical shape and smooth surface with a mean particle diameter of 18.9 μm. The in vitro drug release behavior of C-GMS followed the first-order kinetics. The tissue distribution showed that the drug concentrations at lung tissue for the C-GMS suspension were significantly higher than those for the curcumin solution, and the Ce for lung was 36.19. Histopathological studies proved C-GMS was efficient and safe to be used as a passive targeted drug delivery system to the lung. Hence, C-GMS has a great potential for the targeted delivery of curcumin to the lung.
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Affiliation(s)
- Fengliang Cao
- Department of Pharmacy, Shandong University Hospital, Jinan 250012, China
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"Nanoantibiotics": a new paradigm for treating infectious diseases using nanomaterials in the antibiotics resistant era. J Control Release 2011; 156:128-45. [PMID: 21763369 DOI: 10.1016/j.jconrel.2011.07.002] [Citation(s) in RCA: 1037] [Impact Index Per Article: 79.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2011] [Accepted: 06/29/2011] [Indexed: 11/23/2022]
Abstract
Despite the fact that we live in an era of advanced and innovative technologies for elucidating underlying mechanisms of diseases and molecularly designing new drugs, infectious diseases continue to be one of the greatest health challenges worldwide. The main drawbacks for conventional antimicrobial agents are the development of multiple drug resistance and adverse side effects. Drug resistance enforces high dose administration of antibiotics, often generating intolerable toxicity, development of new antibiotics, and requests for significant economic, labor, and time investments. Recently, nontraditional antibiotic agents have been of tremendous interest in overcoming resistance that is developed by several pathogenic microorganisms against most of the commonly used antibiotics. Especially, several classes of antimicrobial nanoparticles (NPs) and nanosized carriers for antibiotics delivery have proven their effectiveness for treating infectious diseases, including antibiotics resistant ones, in vitro as well as in animal models. This review summarizes emerging efforts in combating against infectious diseases, particularly using antimicrobial NPs and antibiotics delivery systems as new tools to tackle the current challenges in treating infectious diseases.
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Chaisri W, Ghassemi AH, Hennink WE, Okonogi S. Enhanced gentamicin loading and release of PLGA and PLHMGA microspheres by varying the formulation parameters. Colloids Surf B Biointerfaces 2011; 84:508-14. [DOI: 10.1016/j.colsurfb.2011.02.006] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2010] [Revised: 12/04/2010] [Accepted: 02/01/2011] [Indexed: 10/18/2022]
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Wang F, Ni B, Zhu Z, Liu F, Zhu YZ, Liu J. Intra-discal vancomycin-loaded PLGA microsphere injection for MRSA discitis: an experimental study. Arch Orthop Trauma Surg 2011; 131:111-9. [PMID: 20661743 DOI: 10.1007/s00402-010-1154-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2010] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To prepare the vancomycin hydrochloride (VA)-loaded poly lactic acid-glycolic acid (PLGA) copolymer microsphere by the multiple emulsion method and evaluate its therapeutic effects on infective discitis. METHODS Firstly, the particle diameter distribution, shape, encapsulation efficiency, drug-loaded dosage and release curve of VA-PLGA microspheres were evaluated in vitro. Rabbits with methicillin-resistant Staphylococcus aureus infective discitis were treated with VA-PLGA intra-discal injection. Meanwhile, VA intravenous injection, blank PLGA microspheres intra-discal injection served as controls. Thirty days later, therapeutic effects were evaluated through X-ray radiophotography, histopathological and bacteriological examination. RESULTS Mean particle diameter was between 61.57 ± 4.37 and 67.45 ± 8.13 μm, and mean encapsulation efficiency was between 60.20 ± 1.61 and 75.27 ± 1.60 %m/m. In vitro release experiment showed that the release time was over 30 days. The result of in vivo experiment showed that inflammatory reaction in the VA-PLGA intra-discal injection group was milder than the intravenous injection group (P < 0.05), also with less inflammation. The bacterial count was also significantly lower (1.02 × 10(3) ± 1.22 × 10(3) CFU/g) than the intravenous injection group (7.51 × 10(4) ± 7.16 × 10(4) CFU/g) (P < 0.05). Besides these data, the amount used in VA-PLGA intra-discal injection group is about 20 mg, and that used in the intravenous injection group is about 2.4 g. So, we just use 1/120 of VA i.v. to obtain the better results with our microparticles. CONCLUSION Intra-discal injection with VA-PLGA sustained-release microspheres can use much less dosage, and effectively control and reduce infective discitis, and the therapeutic effect is superior to that of intravenous injection. A need for the clinical trials will be carried out in the near future.
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Affiliation(s)
- Fei Wang
- Department of Orthopedics, Changzheng Hospital, The Second Military Medical University, 415 Fengyang Road, Huangpu District, Shanghai 200003, People's Republic of China.
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Fan Y, Shan-Guang W, Yu-Fang P, Feng-Lan S, Tao L. Preparation and characteristics of erythromycin microspheres for lung targeting. Drug Dev Ind Pharm 2010; 35:639-45. [PMID: 19259878 DOI: 10.1080/03639040802512243] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
BACKGROUND If erythromycin is micronized into microspheres with suitable particle size, it can improve pulmonary drug concentration to maximize its effectiveness and minimize the adverse side effects. AIM In this study, erythromycin gelatin microspheres (EM-GMS) were prepared and some characteristics of EM-GMS were investigated. The drug-targeting index (DTI) of EM-GMS was evaluated to predict their potential as a targeted delivery system. METHOD Erythromycin was microencapsulated with gelatin by a double emulsion solvent evaporation method. Some characteristics of EM-GMS, including morphology, particle size, in vitro release, and safety were researched. RESULTS EM-GMS had a spherical shape and smooth surface morphology. The drug loading and encapsulation efficiency of EM-GMS were 13.56 +/- 0.25% and 55.82 +/- 2.23%, respectively. The release of erythromycin from EM-GMS showed an initial burst and following a sustained release, with an accumulate release of 80% at 4 hours. The EM-GMS was safe since there was no vein irritation and no hemolysis on the erythrocyte of rabbit at 3.5 mg/mL and a LD50 of 173.07 mg/kg. After administering EM-GMS to rabbits, the concentration of erythromycin in lung was 15.92 times higher than that in plasma and the DTI of EM-GMS in lung was 6.65 as compared with erythromycin lactobionate. CONCLUSIONS The preparation technology of EM-GMS for lung targeting was successful and the quality of microspheres was good.
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Affiliation(s)
- Yang Fan
- Department of Pharmacy, Guangdong Pharmaceutical University, Guangzhou, PR China
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Sousa FFO, Luzardo-Alvarez A, Pérez-Estévéz A, Seoane-Prado R, Blanco-Méndez J. Development of a novel AMX-loaded PLGA/zein microsphere for root canal disinfection. Biomed Mater 2010; 5:055008. [PMID: 20844319 DOI: 10.1088/1748-6041/5/5/055008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The aim of this study was to develop polymeric biodegradable microspheres (MSs) of poly(D-L lactide-co-glycolide) (PLGA) and zein capable of delivering amoxicillin (AMX) at significant levels for root canal disinfection. PLGA/zein MSs were prepared using a spray-drying technique. The systems were characterized in terms of particle size, morphology, drug loading and in vitro release. Drug levels were reached to be effective during the intracanal dressing in between visits during the endodontic treatment. In vitro release studies were carried out to understand the release profile of the MSs. Antimicrobial activity of AMX was performed by antibiograms. Enterococcus faecalis was the bacteria selected due to its prevalence in endodontic failure. Drug microencapsulation yielded MSs with spherical morphology and an average particle size of between 5 and 38 µm. Different drug-release patterns were obtained among the formulations. Release features related to the MSs were strongly dependent on drug nature as it was demonstrated by using a hydrophobic drug (indomethacin). Finally, AMX-loaded MSs were efficient against E faecalis as demonstrated by the antibiogram results. In conclusion, PLGA/zein MSs prepared by spray drying may be a useful drug delivery system for root canal disinfection.
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Affiliation(s)
- F F O Sousa
- The Capes Foundation, Ministry of Education of Brazil, Cx. Postal 365, Brasília DF 70359-970, Brazil.
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Etman M, Farid R, Nada A, Ebian A. Preparation and evaluation of fast-release mephenamic acid microspheres. J Microencapsul 2010; 27:640-56. [DOI: 10.3109/02652048.2010.506583] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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45
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Panoyan A, Quesnel R, Hildgen P. Injectable nanospheres from a novel multiblock copolymer: Cytocompatibility, degradation andin vitrorelease studies. J Microencapsul 2010. [DOI: 10.3109/02652040309178085] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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46
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Yeni˙ce İ, Çaliş S, Ati˙lla B, Kaş HS, Özalp M, Eki˙zoğlu M, Bi˙lgi˙li˙ H, Hincal AA. in vitro/in vivoevaluation of the efficiency of teicoplanin-loaded biodegradable microparticles formulated for implantation to infected bone defects. J Microencapsul 2010. [DOI: 10.3109/02652040309178082] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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47
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Huang YC, Chiang CH, Yeh MK. Optimizing formulation factors in preparing chitosan microparticles by spray-drying method. J Microencapsul 2010. [DOI: 10.3109/02652040309178065] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Y.-C. Huang
- Graduate Institute of Life Science, National Defense Medical Center, Taipei, Taiwan
| | - C.-H. Chiang
- School of Pharmacy, National Defense Medical Center, Taipei, Taiwan
| | - M.-K. Yeh
- Department of Medical Research, Tri-service General Hospital, Taipei, Taiwan
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48
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Chaisri W, Hennink WE, Ampasavate C, Okonogi S. Cephalexin microspheres for dairy mastitis: effect of preparation method and surfactant type on physicochemical properties of the microspheres. AAPS PharmSciTech 2010; 11:945-51. [PMID: 20509056 DOI: 10.1208/s12249-010-9453-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2010] [Accepted: 04/27/2010] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to evaluate the effects of preparation method and the type of surfactant on the properties of cephalexin (CPX) microspheres in order to obtain delivery systems suitable for the treatment of dairy mastitis. Microspheres were obtained using various preparation conditions and their physicochemical characteristics such as size, loading efficiency, morphology, and drug crystallinity were investigated. Antibacterial activity of microspheres from the optimum preparation condition was also studied. CPX microspheres were prepared by two different W/O/W emulsion solvent evaporation methods using PLGA as a matrix forming polymer. Several types of surfactants including nonionic, cationic, and anionic at different concentrations were used for preparation of the particles. The type and concentration of surfactant did neither affect the size nor morphology of the microspheres but showed a pronounced effect on the CPX encapsulation efficiency. It was found that Tween 80 showed the highest drug encapsulation efficiency (66.5%). Results from X-ray diffraction diffractograms and differential scanning calorimetry thermograms indicated that CPX entrapped in these microparticles was amorphous. Assessment of antibacterial activity showed that the obtained CPX microspheres exhibited good inhibition with minimum inhibitory concentration and minimum bactericidal concentration values of 128 microg/mL and 2,048 mg/mL against Staphylococcus aureus ATCC 25923, 512 microg/mL and 4,096 mg/mL against Escherichia coli ATCC 25922, respectively.
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49
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Slow release antibiotics for treatment of septic arthritis in large animals. Vet J 2010; 184:14-20. [DOI: 10.1016/j.tvjl.2009.02.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2008] [Revised: 02/16/2009] [Accepted: 02/16/2009] [Indexed: 11/20/2022]
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50
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Farazuddin M, Alam M, Khan AA, Khan N, Parvez S, Dutt GU, Mohammad O. Efficacy of amoxicillin bearing microsphere formulation in treatment ofListeria monocytogenesinfection in Swiss albino mice. J Drug Target 2009; 18:45-52. [DOI: 10.3109/10611860903156401] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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