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Bozoglu S, Arvas MB, Varlı HS, Ucar B, Acar T, Karatepe N. Agglomerated serum albumin adsorbed protocatechuic acid coated superparamagnetic iron oxide nanoparticles as a theranostic agent. NANOTECHNOLOGY 2023; 34:145602. [PMID: 36623313 DOI: 10.1088/1361-6528/acb15b] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/08/2023] [Indexed: 06/17/2023]
Abstract
Iron oxide nanoparticles have been one of the most widely used nanomaterials in biomedical applications. However, the incomplete understanding of the toxicity mechanisms limits their use in diagnosis and treatment processes. Many parameters are associated with their toxicity such as size, surface modification, solubility, concentration and immunogenicity. Further research needs to be done to address toxicity-related concerns and to increase its effectiveness in various applications. Herein, colloidally stable nanoparticles were prepared by coating magnetic iron oxide nanoparticles (MIONPs) with protocatechuic acid (PCA) which served as a stabilizer and a linkage for a further functional layer. A new perfusion agent with magnetic imaging capability was produced by the adsorption of biocompatible passivating agent macro-aggregated albumin (MAA) on the PCA-coated MIONPs. PCA-coated MIONPs were investigated using infrared spectroscopy, thermogravimetric analysis and dynamic light scattering while adsorption of MAA was analysed by transmission electron microscopy, Fourier-transform infrared spectroscopy and x-ray diffraction methods. Magnetic measurements of samples indicated that all samples showed superparamagnetic behaviour. Cytotoxicity results revealed that the adsorption of MAA onto PCA-coated MIONPs provided an advantage by diminishing their toxicity against the L929 mouse fibroblast cell line compared to bare Fe3O4.
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Affiliation(s)
- Serdar Bozoglu
- Institute of Energy, Renewable Energy Division, Istanbul Technical University, Istanbul, Turkey
| | - Melih Besir Arvas
- Department of Chemistry, Faculty of Science, Istanbul University, Istanbul, Turkey
| | - Hanife Sevgi Varlı
- Science and Technology Application and Research Center, Yildiz Technical University, Istanbul, Turkey
| | - Burcu Ucar
- Department of Biomedical Engineering, Faculty of Engineering and Architecture, Istanbul Arel University, Istanbul, Turkey
| | - Tayfun Acar
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering, Yildiz Technical University, Istanbul, Turkey
| | - Nilgün Karatepe
- Institute of Energy, Renewable Energy Division, Istanbul Technical University, Istanbul, Turkey
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Gámez E, Mendoza G, Salido S, Arruebo M, Irusta S. Antimicrobial Electrospun Polycaprolactone-Based Wound Dressings: An In Vitro Study About the Importance of the Direct Contact to Elicit Bactericidal Activity. Adv Wound Care (New Rochelle) 2019; 8:438-451. [PMID: 31737424 DOI: 10.1089/wound.2018.0893] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Accepted: 01/10/2019] [Indexed: 01/01/2023] Open
Abstract
Objective: To prepare efficient antibacterial carvacrol (CAR) and thymol (THY)-loaded electrospun polycaprolactone (PCL)-based wound dressings. Approach: Using electrospinning we were able to prepare wound dressings with antimicrobial action thanks to their large surface per volume ratio, which allows their loading with therapeutic amounts of active principles. By nuclear magnetic resonance we demonstrated that the antimicrobial compounds are donors of hydrogen bonds to the ester functional group in PCL, which acts as acceptor and that intermolecular interaction is responsible for the high drug loading achieved. Results: Those mats loaded with CAR and THY without the use of solubilizing agents were able to completely eradicate both Gram-positive (Staphylococcus aureus ATCC 25923) and Gram-negative (Escherichia coli S17 strain) bacteria at doses inferior to the ones needed when using the free nonsupported compounds. A superior antimicrobial action was observed for THY and CAR against Gram-negative bacteria than against Gram-positive bacteria, despite the higher hydrophilicity of the outer layer of Gram-negative bacteria. Innovation: We demonstrate that a direct contact between the bacteria and the dressing is required to elicit antimicrobial action. We also evaluated drug loadings by gas chromatography coupled with mass spectrometry and nuclear magnetic resonance validating a new analytical approach. Finally we were able to visualize the pathogenic bacteria on the dressings by confocal microscopy. Conclusion: The interaction between the PCL-based mat and the pathogenic bacteria is a key issue to achieve complete pathogen eradication. Under no-contact conditions, released CAR or THY from the electrospun mats did not exert any antimicrobial action at the doses tested.
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Affiliation(s)
- Enrique Gámez
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Zaragoza, Spain
| | - Gracia Mendoza
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Zaragoza, Spain
- Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
| | - Sofía Salido
- Department of Inorganic and Organic Chemistry, Faculty of Experimental Sciences, University of Jaén, Agrifood Campus of International Excellence (ceiA3), Jaén, Spain
| | - Manuel Arruebo
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Zaragoza, Spain
- Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Madrid, Spain
| | - Silvia Irusta
- Department of Chemical Engineering, Aragon Institute of Nanoscience (INA), University of Zaragoza, Zaragoza, Spain
- Aragon Health Research Institute (IIS Aragon), Zaragoza, Spain
- Networking Research Center on Bioengineering, Biomaterials and Nanomedicine, CIBER-BBN, Madrid, Spain
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Booysen E, Bezuidenhout M, van Staden ADP, Dimitrov D, Deane SM, Dicks LMT. Antibacterial Activity of Vancomycin Encapsulated in Poly(DL-lactide-co-glycolide) Nanoparticles Using Electrospraying. Probiotics Antimicrob Proteins 2018; 11:310-316. [PMID: 29961212 DOI: 10.1007/s12602-018-9437-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Vancomycin is often used to treat infections caused by β-lactam-resistant bacteria. However, methicillin-resistant strains of Staphylococcus aureus (MRSA) acquired resistance to vancomycin, rendering it less effective in the treatment of serious infections. In the search for novel antibiotics, alternative delivery mechanisms have also been explored. In this study, we report on the encapsulation of vancomycin in PLGA [poly(DL-lactide-co-glycolide)] nanoparticles by electrospraying. The nanoparticles were on average 247 nm in size with small bead formations on the surface. Clusters of various sizes were visible under the SEM (scanning electron microscope). Vancomycin encapsulated in PLGA (VNP) was more effective in inhibiting the growth of S. aureus Xen 31 (MRSA) and S. aureus Xen 36 than un-encapsulated vancomycin. Encapsulated vancomycin had a minimum inhibitory concentration (MIC) of 1 μg/mL against MRSA compared to 5 μg/mL of free vancomycin. At least 70% (w/w) of the vancomycin was encapsulated. Thirty percent of the vancomycin was released within the first 144 h, followed by slow release over 10 days. Vancomycin encapsulated in PLGA nanoparticles may be used to treat serious infections.
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Affiliation(s)
- Elzaan Booysen
- Department of Microbiology, Faculty of Natural Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Martin Bezuidenhout
- Department of Industrial Engineering, Faculty of Engineering, Stellenbosch University, Stellenbosch, South Africa
| | - Anton Du Preez van Staden
- Department of Physiological Science, Faculty of Natural Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Dimiter Dimitrov
- Department of Industrial Engineering, Faculty of Engineering, Stellenbosch University, Stellenbosch, South Africa
| | - Shelly M Deane
- Department of Microbiology, Faculty of Natural Sciences, Stellenbosch University, Stellenbosch, South Africa
| | - Leon M T Dicks
- Department of Microbiology, Faculty of Natural Sciences, Stellenbosch University, Stellenbosch, South Africa.
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Li J, Ding J, Liu T, Liu JF, Yan L, Chen X. Poly(lactic acid) Controlled Drug Delivery. INDUSTRIAL APPLICATIONS OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2017_11] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Wang B, Li H, Yao Q, Zhang Y, Zhu X, Xia T, Wang J, Li G, Li X, Ni S. Local in vitro delivery of rapamycin from electrospun PEO/PDLLA nanofibers for glioblastoma treatment. Biomed Pharmacother 2016; 83:1345-1352. [PMID: 27580454 DOI: 10.1016/j.biopha.2016.08.033] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2016] [Revised: 08/09/2016] [Accepted: 08/11/2016] [Indexed: 01/28/2023] Open
Abstract
Rapamycin, a mammalian target of rapamycin inhibitor and anti-proliferative agent, is used to treat glioma and other malignancies, but its effectiveness is limited by the fact that it cannot be delivered in a targeted manner to the site of the tumor. To address this issue, we fabricated a mesh via electrospinning using two biodegradable materials, poly(lactic acid) (PLA) and polyethylene oxide (PEO) as a carrier for rapamycin delivery to the tumor. Nanofiber diameter decreased with increasing PLA concentration in the mixed solution. Scanning electron microscopy analysis revealed the smooth and uniform surface morphology of hybrid fibers. Fourier transform infrared spectroscopy analysis demonstrated that rapamycin was encapsulated in the polymer solution; encapsulation efficiency was high and stable over the range of drug concentrations from 0.5-2wt%. A correlation was observed between sustained release of the drug in vitro and cytotoxicity in cultured glioma cells. These results indicate that the PEO/poly(d,l-lactic acid) nanofiber mesh can be used as a targeted delivery system for rapamycin that can limit side effects and prevent locoregional recurrence following surgical resection of glioma.
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Affiliation(s)
- Benlin Wang
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Haoyuan Li
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Qingyu Yao
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Yulin Zhang
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Xiaodong Zhu
- Affiliated Hospital of Jining Medical University, Jining 272000, China
| | - Tongliang Xia
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China
| | - Jian Wang
- Brain Science Research Institute, Shandong University, Jinan 250012, China; Department of Biomedicine, University of Bergen, Jonas Lies Vei 91, 5009 Bergen, Norway
| | - Gang Li
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China; Brain Science Research Institute, Shandong University, Jinan 250012, China
| | - Xingang Li
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China; Brain Science Research Institute, Shandong University, Jinan 250012, China
| | - Shilei Ni
- Department of Neurosurgery, Qilu Hospital, Shandong University, Jinan 250012, China.
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Ahire JJ, Dicks LMT. Nisin Incorporated With 2,3-Dihydroxybenzoic Acid in Nanofibers Inhibits Biofilm Formation by a Methicillin-Resistant Strain of Staphylococcus aureus. Probiotics Antimicrob Proteins 2016; 7:52-9. [PMID: 25319566 DOI: 10.1007/s12602-014-9171-5] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The aim of the present study was to determine the effect of nisin, 2,3-dihydroxybenzoic acid (DHBA) and a combination of nisin and DHBA incorporated into nanofibers prepared from poly(D,L-lactide) (PDLLA) and poly(ethylene oxide) (PEO) on biofilm formation of a methicillin-resistant strain of Staphylococcus aureus (strain Xen 31). Biofilm formation decreased by 88% after 24 h of exposure to nanofibers containing nisin and DHBA (NDF), compared to a 63% decrease when exposed to nanofibers containing only DHBA (DF) and a 3% decrease when exposed to nanofibers containing only nisin (NF). Planktonic cell numbers of biofilms exposed to nanofibers without nisin or DHBA (CF) and NF increased from no detectable OD(595nm) readings to 0.35 and 0.3, respectively, within the first 8 h of exposure, followed by a steady decline over the following 16 h. Planktonic cells of biofilms treated with DF increased from no detectable OD(595nm) readings to 0.05 after 8 h of exposure and remained more-or-less constant for the duration of the experiment. Planktonic cells of biofilms exposed to NDF increased from OD(595nm) 0.03 after 8 h of exposure and to 0.2 over the following 16 h. Biofilm formation increased with increasing concentrations of FeCl3·6H2O, which suggests that iron is required for S. aureus Xen 31 to form a biofilm. However, when exposed to NDF, biofilm formation decreased significantly in the presence of increasing concentrations of iron. This suggests that NDF may be used to prevent biofilm formation of MRSA and control infection.
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Affiliation(s)
- Jayesh J Ahire
- Department of Microbiology, University of Stellenbosch, Private Bag X1, Matieland, 7602, Stellenbosch, South Africa
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Ahire JJ, Hattingh M, Neveling DP, Dicks LMT. Copper-Containing Anti-Biofilm Nanofiber Scaffolds as a Wound Dressing Material. PLoS One 2016; 11:e0152755. [PMID: 27028292 PMCID: PMC4814046 DOI: 10.1371/journal.pone.0152755] [Citation(s) in RCA: 43] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 03/18/2016] [Indexed: 12/15/2022] Open
Abstract
Copper particles were incorporated into nanofibers during the electrospinning of poly-D,L-lactide (PDLLA) and poly(ethylene oxide) (PEO). The ability of the nanofibers to prevent Pseudomonas aeruginosa PA01 and Staphylococcus aureus (strain Xen 30) to form biofilms was tested. Nanofibers containing copper particles (Cu-F) were thinner (326 ± 149 nm in diameter), compared to nanofibers without copper (CF; 445 ± 93 nm in diameter). The crystalline structure of the copper particles in Cu-F was confirmed by X-ray diffraction (XRD). Copper crystals were encapsulated, but also attached to the surface of Cu-F, as shown scanning transmission electron microscopy (STEM) and transmission electron microscopy (TEM), respectively. The copper particles had no effect on the thermal degradation and thermal behaviour of Cu-F, as shown by thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC). After 48 h in the presence of Cu-F, biofilm formation by P. aeruginosa PA01 and S. aureus Xen 30 was reduced by 41% and 50%, respectively. Reduction in biofilm formation was ascribed to copper released from the nanofibers. Copper-containing nanofibers may be incorporated into wound dressings.
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Affiliation(s)
- Jayesh J. Ahire
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
| | - Melanie Hattingh
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
| | - Deon P. Neveling
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
| | - Leon M. T. Dicks
- Department of Microbiology, University of Stellenbosch, 7602 Matieland (Stellenbosch), South Africa
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Ahire JJ, Robertson D, Neveling DP, van Reenen AJ, Dicks LMT. Hyaluronic acid-coated poly(d,l-lactide) (PDLLA) nanofibers prepared by electrospinning and coating. RSC Adv 2016. [DOI: 10.1039/c6ra01996j] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Process of preparation of HA/PDLLA nanohybrids.
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Affiliation(s)
- J. J. Ahire
- Department of Microbiology
- University of Stellenbosch
- Stellenbosch
- South Africa
| | - D. Robertson
- Department of Chemistry and Polymer Science
- University of Stellenbosch
- Stellenbosch
- South Africa
| | - D. P. Neveling
- Department of Microbiology
- University of Stellenbosch
- Stellenbosch
- South Africa
| | - A. J. van Reenen
- Department of Chemistry and Polymer Science
- University of Stellenbosch
- Stellenbosch
- South Africa
| | - L. M. T. Dicks
- Department of Microbiology
- University of Stellenbosch
- Stellenbosch
- South Africa
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Ahire JJ, Neveling DP, Dicks LMT. Co-spinning of Silver Nanoparticles with Nisin Increases the Antimicrobial Spectrum of PDLLA: PEO Nanofibers. Curr Microbiol 2015; 71:24-30. [PMID: 25855302 DOI: 10.1007/s00284-015-0813-y] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Accepted: 02/26/2015] [Indexed: 01/19/2023]
Abstract
Silver nanoparticles (AgNPs), synthesized using N,N-dimethylformamide (DMF), were electrospun with nisin in a 50:50 blend of 24 % (w/v) poly(D,L-lactide) (PDLLA) and poly(ethylene oxide) (PEO). Addition of AgNPs decreased the average diameter of the nanofibers [silver nanofibers (SF)] from 588 ± 191 to 281 ± 64 nm, or to 288 ± 63 nm when nisin was co-spun with AgNPs. Nanofibers containing AgNO3 (SF) had a beads-on-string structure, whereas nanofibers with AgNPs and nisin [silver plus nisin nanofibers (SNF)], nanofibers with only nisin [nisin nanofibers (NF)], and nanofibers without AgNPs and nisin [control nanofibers] had a uniform structure. The irregular topography was confirmed by atomic force microscopy. No interactions occurred between silver, nisin, PDLLA, and PEO, as confirmed with Fourier transform infrared spectroscopy. Most of the AgNPs (18 ± 2.8 ppm) and nisin (78.1 ± 1.2 µg/ml) were released within the first 2 h. SF and SNF inhibited the growth of gram-positive and gram-negative bacteria, whereas NF failed to inhibit gram-negative bacteria. A wound dressing with broad-spectrum antimicrobial activity may be developed by the incorporation of nanofibers containing a combination of AgNPs and nisin.
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Affiliation(s)
- Jayesh J Ahire
- Department of Microbiology, University of Stellenbosch, Matieland, Stellenbosch, 7602, South Africa
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Ciprofloxacin-eluting nanofibers inhibits biofilm formation by Pseudomonas aeruginosa and a methicillin-resistant Staphylococcus aureus. PLoS One 2015; 10:e0123648. [PMID: 25853255 PMCID: PMC4390291 DOI: 10.1371/journal.pone.0123648] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 02/27/2015] [Indexed: 11/25/2022] Open
Abstract
Pseudomonas aeruginosa and Staphylococcus aureus are commonly associated with hospital-acquired infections and are known to form biofilms. Ciprofloxacin (CIP), which is normally used to treat these infections, is seldom effective in killing cells in a biofilm. This is mostly due to slow or weak penetration of CIP to the core of biofilms. The problem is accentuated by the release of CIP below MIC (minimal inhibitory concentration) levels following a rapid (burst) release. The aim of this study was to develop a drug carrier that would keep CIP above MIC levels for an extended period. Ciprofloxacin was suspended into poly(D,L-lactide) (PDLLA) and poly(ethylene oxide) (PEO), and electrospun into nanofibers (CIP-F). All of the CIP was released from the nanofibers within 2 h, which is typical of a burst release. However, 99% of P. aeruginosa PA01 cells and 91% of S. aureus Xen 30 cells (a methicillin-resistant strain) in biofilms were killed when exposed to CIP-F. CIP levels remained above MIC for 5 days, as shown by growth inhibition of the cells in vitro. The nanofibers were smooth in texture with no bead formation, as revealed by scanning electron and atomic force microscopy. A single vibration peak at 1632 cm-1, recorded with Fourier transform infrared spectroscopy, indicated that CIP remained in crystal form when incorporated into PDLLA: PEO. No abnormalities in the histology of MCF-12A breast epithelial cells were observed when exposed to CIP-F. This is the first report of the inhibition of biofilm formation by CIP released from PDLLA: PEO nanofibers.
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