1
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Study of stability, kinetic parameters and release of lysozyme immobilized on chitosan microspheres by crosslinking and covalent attachment for cotton fabric functionalization. Process Biochem 2023. [DOI: 10.1016/j.procbio.2023.02.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
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2
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Sommonte F, Arduino I, Iacobazzi RM, Tiboni M, Catalano F, Marotta R, Di Francesco M, Casettari L, Decuzzi P, Lopedota AA, Denora N. Microfluidic assembly of "Turtle-Like" shaped solid lipid nanoparticles for lysozyme delivery. Int J Pharm 2023; 631:122479. [PMID: 36509224 DOI: 10.1016/j.ijpharm.2022.122479] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2022] [Revised: 11/15/2022] [Accepted: 12/05/2022] [Indexed: 12/13/2022]
Abstract
After two decades of research in the field of nanomedicine, nanoscale delivery systems for biologicals are becoming clinically relevant tools. Microfluidic-based fabrication processes are replacing conventional techniques based on precipitation, emulsion, and homogenization. Here, the focus is on solid lipid nanoparticles (SLNs) for the encapsulation and delivery of lysozyme (LZ) as a model biologic. A thorough analysis was conducted to compare conventional versus microfluidic-based production techniques, using a 3D-printed device. The efficiency of the microfluidic technique in producing LZ-loaded SLNs (LZ SLNs) was demonstrated: LZ SLNs were found to have a lower size (158.05 ± 4.86 nm vs 180.21 ± 7.46 nm) and higher encapsulation efficacy (70.15 ± 1.65 % vs 53.58 ± 1.13 %) as compared to particles obtained with conventional methods. Cryo-EM studies highlighted a peculiar turtle-like structure on the surface of LZ SLNs. In vitro studies demonstrated that LZ SLNs were suitable to achieve a sustained release over time (7 days). Enzymatic activity of LZ entrapped into SLNs was challenged on Micrococcus lysodeikticus cultures, confirming the stability and potency of the biologic. This systematic analysis demonstrates that microfluidic production of SLNs can be efficiently used for encapsulation and delivery of complex biological molecules.
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Affiliation(s)
- Federica Sommonte
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona St. 4, 70125 Bari, Italy
| | - Ilaria Arduino
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona St. 4, 70125 Bari, Italy
| | - Rosa Maria Iacobazzi
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona St. 4, 70125 Bari, Italy
| | - Mattia Tiboni
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza del Rinascimento 6, 61029 Urbino, Italy
| | - Federico Catalano
- Electron Microscopy Facility, Fondazione Istituto Italiano di Tecnologia, Morego St. 30, 16163 Genoa, Italy
| | - Roberto Marotta
- Electron Microscopy Facility, Fondazione Istituto Italiano di Tecnologia, Morego St. 30, 16163 Genoa, Italy
| | - Martina Di Francesco
- Laboratory of Nanotechnology for Precision Medicine, Fondazione Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy
| | - Luca Casettari
- Department of Biomolecular Sciences, University of Urbino Carlo Bo, Piazza del Rinascimento 6, 61029 Urbino, Italy
| | - Paolo Decuzzi
- Laboratory of Nanotechnology for Precision Medicine, Fondazione Istituto Italiano di Tecnologia, Via Morego 30, 16163 Genoa, Italy
| | - Angela Assunta Lopedota
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona St. 4, 70125 Bari, Italy
| | - Nunzio Denora
- Department of Pharmacy - Pharmaceutical Sciences, University of Bari Aldo Moro, Orabona St. 4, 70125 Bari, Italy.
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3
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Mechanism of antimicrobials immobilized on packaging film inhabiting foodborne pathogens. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.114037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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4
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Lemarchand J, Bridonneau N, Battaglini N, Carn F, Mattana G, Piro B, Zrig S, Noël V. Challenges, Prospects, and Emerging Applications of Inkjet-Printed Electronics: A Chemist's Point of View. Angew Chem Int Ed Engl 2022; 61:e202200166. [PMID: 35244321 DOI: 10.1002/anie.202200166] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Indexed: 12/15/2022]
Abstract
Driven by the development of new functional inks, inkjet-printed electronics has achieved several milestones upon moving from the integration of simple electronic elements (e.g., temperature and pressure sensors, RFID antennas, etc.) to high-tech applications (e.g. in optoelectronics, energy storage and harvesting, medical diagnosis). Currently, inkjet printing techniques are limited by spatial resolution higher than several micrometers, which sets a redhibitorythreshold for miniaturization and for many applications that require the controlled organization of constituents at the nanometer scale. In this Review, we present the physico-chemical concepts and the equipment constraints underpinning the resolution limit of inkjet printing and describe the contributions from molecular, supramolecular, and nanomaterials-based approaches for their circumvention. Based on these considerations, we propose future trajectories for improving inkjet-printing resolution that will be driven and supported by breakthroughs coming from chemistry. Please check all text carefully as extensive language polishing was necessary. Title ok? Yes.
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Affiliation(s)
| | | | | | - Florent Carn
- Université de Paris, Laboratoire Matière et Systèmes Complexes CNRS, UMR 7057, 75013, Paris, France
| | | | - Benoit Piro
- Université de Paris, CNRS, ITODYS, 75013, Paris, France
| | - Samia Zrig
- Université de Paris, CNRS, ITODYS, 75013, Paris, France
| | - Vincent Noël
- Université de Paris, CNRS, ITODYS, 75013, Paris, France
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5
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Lemarchand J, Bridonneau N, Battaglini N, Carn F, Mattana G, Piro B, Zrig S, NOEL V. Challenges and Prospects of Inkjet Printed Electronics Emerging Applications – a Chemist point of view. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202200166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Florent Carn
- Universite de Paris UFR Physique Physique FRANCE
| | | | | | | | - Vincent NOEL
- Universite Paris Diderot ITODYS 13 rue J de Baif 75013 Paris FRANCE
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6
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Ferraboschi P, Ciceri S, Grisenti P. Applications of Lysozyme, an Innate Immune Defense Factor, as an Alternative Antibiotic. Antibiotics (Basel) 2021; 10:1534. [PMID: 34943746 PMCID: PMC8698798 DOI: 10.3390/antibiotics10121534] [Citation(s) in RCA: 118] [Impact Index Per Article: 39.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 12/03/2021] [Accepted: 12/08/2021] [Indexed: 12/18/2022] Open
Abstract
Lysozyme is a ~14 kDa protein present in many mucosal secretions (tears, saliva, and mucus) and tissues of animals and plants, and plays an important role in the innate immunity, providing protection against bacteria, viruses, and fungi. Three main different types of lysozymes are known: the c-type (chicken or conventional type), the g-type (goose type), and the i-type (invertebrate type). It has long been the subject of several applications due to its antimicrobial properties. The problem of antibiotic resistance has stimulated the search for new molecules or new applications of known compounds. The use of lysozyme as an alternative antibiotic is the subject of this review, which covers the results published over the past two decades. This review is focused on the applications of lysozyme in medicine, (the treatment of infectious diseases, wound healing, and anti-biofilm), veterinary, feed, food preservation, and crop protection. It is available from a wide range of sources, in addition to the well-known chicken egg white, and its synergism with other compounds, endowed with antimicrobial activity, are also summarized. An overview of the modified lysozyme applications is provided in the form of tables.
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Affiliation(s)
- Patrizia Ferraboschi
- Department of Medical Biotechnology and Translational Medicine, University of Milan, Via C. Saldini 50, 20133 Milano, Italy;
| | - Samuele Ciceri
- Department of Pharmaceutical Sciences, University of Milan, Via L. Mangiagalli 25, 20133 Milano, Italy;
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Cerón AA, Nascife L, Norte S, Costa SA, Oliveira do Nascimento JH, Morisso FDP, Baruque-Ramos J, Oliveira RC, Costa SM. Synthesis of chitosan-lysozyme microspheres, physicochemical characterization, enzymatic and antimicrobial activity. Int J Biol Macromol 2021; 185:572-581. [PMID: 34216659 DOI: 10.1016/j.ijbiomac.2021.06.178] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2021] [Revised: 06/22/2021] [Accepted: 06/26/2021] [Indexed: 11/24/2022]
Abstract
Chitosan microspheres (CMS) by the emulsion-chemical cross-linking method with and without lysozyme immobilization were synthesized and characterized. The technique conditions were adjusted, and spherical particles with approximate diameters of 3.74 ± 1.08 μm and 0. 29 ± 0.029 μm to CMS and chitosan-lysozyme microspheres (C-LMS), respectively, were obtained. The microspheres were characterized by scanning electron microscopy (FESEM), Spectroscopy Fourier Transform Spectroscopy (ATR-FTIR), X-ray diffraction (XRD), and zeta potential. Particle size was identified by laser light scattering (DLS) and the thermal properties by Differential Scanning Calorimetry (DSC) and Thermogravimetry (TGA) were determined. By the lysis of Micrococcus lysodeikticus, the activity of the microspheres was determined, and the results correlated with the amount of lysozyme used in the immobilization process and the enzyme loading efficiency was 67%. Finally, release tests pointed out the amount of enzyme immobilized on the microsphere surface. These results showed that chitosan microspheres could be used as material for lysozyme immobilization by cross-linking technique. The antimicrobial activity was tested by inhibition percent determination, and it evidenced both chitosan microspheres (CMS) and chitosan-lysozyme microspheres (C-LMS) positive antimicrobial activity to Staphylococcus aureus, Enterococcus faecalis and Pseudomonas aeruginosa.
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Affiliation(s)
- Annie A Cerón
- School of Arts, Sciences and Humanities, Textile and Fashion Course, University of São Paulo, Av. Arlindo Bétio 1000, Ermelino Matarazzo, São Paulo, SP 03828-000, Brazil.
| | - Lorrane Nascife
- School of Arts, Sciences and Humanities, Textile and Fashion Course, University of São Paulo, Av. Arlindo Bétio 1000, Ermelino Matarazzo, São Paulo, SP 03828-000, Brazil
| | - Samuel Norte
- Center of Agricultural Sciences, University Federal of São Carlos, Rodovia Anhanguera, km 174, Araras, SP 13600-97, Brazil
| | - Silgia A Costa
- School of Arts, Sciences and Humanities, Textile and Fashion Course, University of São Paulo, Av. Arlindo Bétio 1000, Ermelino Matarazzo, São Paulo, SP 03828-000, Brazil
| | | | | | - Júlia Baruque-Ramos
- School of Arts, Sciences and Humanities, Textile and Fashion Course, University of São Paulo, Av. Arlindo Bétio 1000, Ermelino Matarazzo, São Paulo, SP 03828-000, Brazil
| | - Rodrigo C Oliveira
- Departament of Biological Sciences, Bauru School of Dentistry, University of São Paulo, Alameda Dr. Octávio Pinheiro Brisolla, 9-75, Vila Universitária, Bauru, SP 17012-901, Brazil
| | - Sirlene M Costa
- School of Arts, Sciences and Humanities, Textile and Fashion Course, University of São Paulo, Av. Arlindo Bétio 1000, Ermelino Matarazzo, São Paulo, SP 03828-000, Brazil
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Çaykara T, Sande MG, Azoia N, Rodrigues LR, Silva CJ. Exploring the potential of polyethylene terephthalate in the design of antibacterial surfaces. Med Microbiol Immunol 2020; 209:363-372. [PMID: 32037497 PMCID: PMC7248016 DOI: 10.1007/s00430-020-00660-8] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 01/22/2020] [Indexed: 12/28/2022]
Abstract
Polyethylene terephthalate (PET) is one of the most used polymeric materials in the health care sector mainly due to its advantages that include biocompatibility, high uniformity, mechanical strength and resistance against chemicals and/or abrasion. However, avoiding bacterial contamination on PET is still an unsolved challenge and two main strategies are being explored to overcome this drawback: the anti-adhesive and biocidal modification of PET surface. While bacterial adhesion depends on several surface properties namely surface charge and energy, hydrophilicity and surface roughness, a biocidal effect can be obtained by antimicrobial compounds attached to the surface to inhibit the growth of bacteria (bacteriostatic) or kill bacteria (bactericidal). Therefore, it is well known that granting antibacterial properties to PET surface would be beneficial in the prevention of infectious diseases. Different modification methods have been reported for such purpose. This review addresses some of the strategies that have been attempted to prevent or reduce the bacterial contamination on PET surfaces, including functionalisation, grafting, topographical surface modification and coating. Those strategies, particularly the grafting method seems to be very promising for healthcare applications to prevent infectious diseases and the emergence of bacteria resistance.
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Affiliation(s)
- Tugçe Çaykara
- CENTI-Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 278, 4760-034, Vila Nova de Famalicão, Portugal
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Maria G Sande
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Nuno Azoia
- CENTI-Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 278, 4760-034, Vila Nova de Famalicão, Portugal
| | - Ligia R Rodrigues
- CEB-Centre of Biological Engineering, Universidade do Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Carla Joana Silva
- CENTI-Center for Nanotechnology and Smart Materials, Rua Fernando Mesquita 278, 4760-034, Vila Nova de Famalicão, Portugal.
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9
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Sreeja S, Muraleedharan C, Varma PH, Sailaja G. Surface-transformed osteoinductive polyethylene terephthalate scaffold as a dual system for bone tissue regeneration with localized antibiotic delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2020; 109:110491. [DOI: 10.1016/j.msec.2019.110491] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2019] [Revised: 11/23/2019] [Accepted: 11/24/2019] [Indexed: 02/07/2023]
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10
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Zhang X, Zhou J, Cheng J, Zhu J, He D. ZnO-assisted coating of tetracalcium phosphate/ gelatin on the polyethylene terephthalate woven nets by atomic layer deposition. E-POLYMERS 2020. [DOI: 10.1515/epoly-2020-0010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
A new kind of coating consisting of zinc oxide (ZnO)/tetracalcium phosphate (TTCP)/gelatin (Gel) on the PET woven nets is prepared chemically by the method of atomic layer deposition (ALD) and hydrothermal method. The prepared materials are confirmed by XRD and SEM. XRD results show that ZnO and TTCP are well coated on the surface of PET woven nets and ALD-assisted ZnO leads to a surprising coating adhesion of about 8 MPa. Furthermore, SEM results indicate the diameter and morphology of ZnO, TTCP and Gel of PET woven nets. And the water contact angles of PET’s surface are decreased with ZnO, TTCP and Gel of PET woven nets. Moreover, the confocal imaging of NIH3T3 cells shows that the obtained product could promote the cells proliferation, which indicates that the good biocompatibility of the prepared PET/ZnO/TTCP/ Gel woven builds a foundation for their future application. The results aim to obtain an efficient method to modify PET for fabricating an ideal artificial implant meeting the clinical needs, and imply a positive effect in promoting the compatibility of PET for enhancing graft-bone healing after implantation.
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Affiliation(s)
- Xinyi Zhang
- School of Materials Science and Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
| | - Juan Zhou
- National Engineering Research Center for Nanotechnology , 28 East Jiangchuan Road , Shanghai 200241 , P. R. China
| | - Jiejun Cheng
- Department of Radiology, Shanghai Renji Hospital , Shanghai Jiao Tong University School of Medicine , 1630 Dongfang Rd , Shanghai 200127 , P. R. China
| | - Jun Zhu
- National Engineering Research Center for Nanotechnology , 28 East Jiangchuan Road , Shanghai 200241 , P. R. China
| | - Dannong He
- School of Materials Science and Engineering , Shanghai Jiao Tong University , 800 Dongchuan Road , Shanghai 200240 , P. R. China
- National Engineering Research Center for Nanotechnology , 28 East Jiangchuan Road , Shanghai 200241 , P. R. China
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11
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Baghdan E, Raschpichler M, Lutfi W, Pinnapireddy SR, Pourasghar M, Schäfer J, Schneider M, Bakowsky U. Nano spray dried antibacterial coatings for dental implants. Eur J Pharm Biopharm 2019; 139:59-67. [DOI: 10.1016/j.ejpb.2019.03.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 02/28/2019] [Accepted: 03/01/2019] [Indexed: 12/11/2022]
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12
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Vögeling H, Plenagl N, Seitz BS, Duse L, Pinnapireddy SR, Dayyoub E, Jedelska J, Brüßler J, Bakowsky U. Synergistic effects of ultrasound and photodynamic therapy leading to biofilm eradication on polyurethane catheter surfaces modified with hypericin nanoformulations. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2019; 103:109749. [PMID: 31349520 DOI: 10.1016/j.msec.2019.109749] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 04/23/2019] [Accepted: 05/13/2019] [Indexed: 12/28/2022]
Abstract
Catheter related infections are causing one third of all blood stream infections. The mortality of those infections is very high and the gold standard for catheter related blood stream infections (CR-BSI) is still the removal of the catheter and systemic antibiotic therapy. There already exist some approaches to prevent the biofilm formation on catheter material, which are far from ideal. A new strategy to prevent bacterial colonization on catheter surfaces is the application of photodynamic therapy (PDT). Therefor the surface has to be modified with substances that can be activated by light, leading to the production of cell toxic reactive oxygen species (ROS). Only small concentrations of the so called photosensitizer (PS) are necessary, avoiding side effects in human therapy. Furthermore, there is no resistance development in PDT. In this study polyurethane (PUR) surfaces were coated with hypericin nanoformulations, leading to 4.3 log10 reduction in bacterial growth in vitro. The effect could be enhanced by the application of ultrasound. The combination of PDT with ultrasound therapy led to a synergistic effect resulting in a 6.8 log10 reduction of viable counts. This minimal invasive method requires only an optical fibre inserted in the catheter lumen and an ultrasound device. Thus the implementation in daily clinical practice is very simple.
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Affiliation(s)
- Hendrik Vögeling
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Nikola Plenagl
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | | | - Lili Duse
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany.
| | | | - Eyas Dayyoub
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Jarmila Jedelska
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Jana Brüßler
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, 35037 Marburg, Germany.
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13
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Costoya A, Velázquez Becerra LE, Meléndez-Ortiz HI, Díaz-Gómez L, Mayer C, Otero A, Concheiro A, Bucio E, Alvarez-Lorenzo C. Immobilization of antimicrobial and anti-quorum sensing enzymes onto GMA-grafted poly(vinyl chloride) catheters. Int J Pharm 2019; 558:72-81. [DOI: 10.1016/j.ijpharm.2018.12.075] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Revised: 12/04/2018] [Accepted: 12/29/2018] [Indexed: 11/30/2022]
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14
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Immobilization and characterization of PLGA nanoparticles on polyethylene terephthalate cardiovascular grafts for local drug therapy of associated graft complications. J Drug Deliv Sci Technol 2018. [DOI: 10.1016/j.jddst.2018.07.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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15
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Graft copolymerization by ionization radiation, characterization, and enzymatic activity of temperature-responsive SR- g -PNVCL loaded with lysozyme. REACT FUNCT POLYM 2018. [DOI: 10.1016/j.reactfunctpolym.2018.03.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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16
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Bugatti V, Viscusi G, Naddeo C, Gorrasi G. Nanocomposites Based on PCL and Halloysite Nanotubes Filled with Lysozyme: Effect of Draw Ratio on the Physical Properties and Release Analysis. NANOMATERIALS 2017; 7:nano7080213. [PMID: 28777354 PMCID: PMC5575695 DOI: 10.3390/nano7080213] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 07/21/2017] [Accepted: 08/01/2017] [Indexed: 11/29/2022]
Abstract
Halloysite nanotubes (HNTs) were loaded with lsozyme, as antimicrobial molecule, at a HNTs/lysozyme ratio of 1:1. Such a nano-hybrid was incorporated into a poly (ε-caprolactone) (PCL) matrix at 10 wt % and films were obtained. The nano-composites were submitted to a cold drawn process at three different draw ratios, λ = 3, 4, and 5, where λ is l(final length)/l0(initial length). Morphology, physical, and barrier properties of the starting nanocomposite and drawn samples were studied, and correlated to the release of the lysozyme molecule. It was demonstrated that with a simple mechanical treatment it is possible to obtain controlled release systems for specific active packaging requirements.
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Affiliation(s)
- Valeria Bugatti
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (Salerno), Italy.
| | - Gianluca Viscusi
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (Salerno), Italy.
| | - Carlo Naddeo
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (Salerno), Italy.
| | - Giuliana Gorrasi
- Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano (Salerno), Italy.
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17
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Al Meslmani BM, Mahmoud GF, Bakowsky U. Development of expanded polytetrafluoroethylene cardiovascular graft platform based on immobilization of poly lactic-co-glycolic acid nanoparticles using a wet chemical modification technique. Int J Pharm 2017; 529:238-244. [PMID: 28689963 DOI: 10.1016/j.ijpharm.2017.06.091] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Revised: 06/16/2017] [Accepted: 06/30/2017] [Indexed: 10/19/2022]
Abstract
Expanded polytetrafluoroethylene ePTFE grafts are mostly employed to replace damaged blood vessels and to restore normal blood flow. However, the dilemma of early thrombosis, inflammation, and development of biofilms after implantation limit ePTFE long-term patency and restrict the patient's life quality. In this study, poly lactic-co-glycolic acid (PLGA) nanoparticles were covalently immobilized on ePTFE surface for local therapeutic purposes. First, the ePTFE surface was primarily oxidized by H2O2/H2SO4 solution to create hydroxyl groups. Consequently, free amino groups were introduced onto ePTFE surface by an aminolyzation reaction of the activated hydroxyl groups using 3-aminopropyl triethoxysilane. The produced amino groups were further used as anchor sites for covalent immobilization of previously prepared PLGA nanoparticles. The functional groups originated on ePTFE surface were confirmed by FTIR analysis. Furthermore, the scanning electron microscopy visualization evidenced a homogeneous distribution pattern of the immobilized PLGA nanoparticles on the surface. The immobilized PLGA nanoparticles showed stability on ePTFE surface under blood flow mimetic conditions. Additionally, light microscopy observation confirmed the biocompatibility of mouse L929 fibroblasts on the nano-coated ePTFE graft. The cellular adhesion and growth did not reveal remarkable cytotoxicity in the tested modified ePTFE grafts.
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Affiliation(s)
- Bassam M Al Meslmani
- Department of Pharmaceutical Technology and Biopharmaceutics, Philipps University, Robert-Koch-Str. 4, 35037, Marburg, Germany.
| | - Gihan F Mahmoud
- Department of Pharmaceutical Technology and Biopharmaceutics, Philipps University, Robert-Koch-Str. 4, 35037, Marburg, Germany; Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Helwan University, Ain Helwan, 11795, Cairo, Egypt.
| | - Udo Bakowsky
- Department of Pharmaceutical Technology and Biopharmaceutics, Philipps University, Robert-Koch-Str. 4, 35037, Marburg, Germany.
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18
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Wu G, Deng H, Jiang T, Tu H, Chen J, Zhan Y, Wang Y, Ma X. Regulating the gaps between folds on the surface of silk fibroin membranes via LBL deposition for improving their biomedical properties. Colloids Surf B Biointerfaces 2017; 154:228-238. [PMID: 28347944 DOI: 10.1016/j.colsurfb.2017.02.038] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2016] [Revised: 02/25/2017] [Accepted: 02/27/2017] [Indexed: 11/19/2022]
Abstract
Silk fibroin (SF) has become a promising biomaterial in guided bone regeneration (GBR). In an attempt to modify the size of the gaps on the surface of SF barrier membrane and improve its antibacterial activity, biological and mechanical properties, positively charged Lysozyme (LY)-Collagen Type-I (COL) composites and negatively charged SF were introduced to the negatively charged surface of SF substrates utilizing the electrostatic layer-by-layer (LBL) self-assembly technique. The morphology, chemical structures and element content of the LBL structured membranes were investigated. The results suggested that LY and COL were successfully assembled and the gaps between the folds on the surface of the membranes became smaller gradually with the increase of coated film numbers. Besides, the content of β-sheets of the membranes increased after deposition, which indicated the improvement of their mechanical properties. Moreover, the results of the measurement of immobilized LY and antibacterial assay not only revealed that the enzymatic catalysis and antibacterial activity of the samples enhanced with the increase of coated bilayer numbers but also implied that LBL modified membranes had better antibacterial activity when LY-COL was on the outermost layer. Furthermore, CCK-8 assay certified both SF membrane and LBL structured membranes could facilitate cell growth and proliferation, and the introduction of COL could further promote this ability. Finally, cell attachment and morphology examination provided intuitional evidence that SF membrane and LBL modified membranes have excellent biocompatibility.
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Affiliation(s)
- Guomin Wu
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Hongbing Deng
- Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
| | - Tao Jiang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China; Department of Prosthodontics, Hospital of Stomatology, Wuhan University, Wuhan 430079, China
| | - Hu Tu
- Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
| | - Jiajia Chen
- Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
| | - Yingfei Zhan
- Hubei International Scientific and Technological Cooperation Base of Sustainable Resource and Energy, School of Resource and Environmental Science, Wuhan University, Wuhan 430079, China
| | - Yining Wang
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China; Department of Prosthodontics, Hospital of Stomatology, Wuhan University, Wuhan 430079, China.
| | - Xiao Ma
- The State Key Laboratory Breeding Base of Basic Science of Stomatology (Hubei-MOST) and Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan 430079, China; Key Laboratory of Oral Medicine, Guangzhou Institute of Oral Disease, Stomatology Hospital of Guangzhou Medical University, Guangzhou, 510140, China.
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Lysozyme immobilization onto PVC catheters grafted with NVCL and HEMA for reduction of bacterial adhesion. Radiat Phys Chem Oxf Engl 1993 2016. [DOI: 10.1016/j.radphyschem.2016.04.023] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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