1
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Zhang G, Li Y, Ke Q, Bai J, Luo F, Zhang J, Ding Y, Chen J, Liu P, Wang S, Gao C, Yang M. Preparation of Rechargeable Antibacterial Polypropylene/N-Halamine Materials Based on Melt Blending and Surface Segregation. ACS APPLIED MATERIALS & INTERFACES 2023; 15:47531-47540. [PMID: 37787377 DOI: 10.1021/acsami.3c10257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/04/2023]
Abstract
Polypropylene (PP) has been widely used in health care and food packaging fields, however, it lacks antibacterial properties. Herein, we prepared the polymeric antibacterial agents (MPP-NDAM) by an in situ amidation reaction between 2,4-diamino-6-dialkylamino-1,3,5-triazine (NDAM) and maleic anhydride grafted polypropylene (MPP) using the melt grafting method. The effects of reaction time and monomer content on the grafting degree of N-halamine were investigated, and a grafting degree of 4.86 wt % was achieved under the optimal reaction conditions. PP/MPP-NDAM composites were further obtained by a melt blending process between PP and MPP-NDAM. With the adoption of surface segregation technology, the content of N-halamine structure on the surface of PP/MPP-NDAM composites was significantly increased. The antibacterial tests showed that the PP/MPP-NDAM composite could achieve 99.9% bactericidal activity against 1.0 × 107 CFU/mL of Escherichia coli (E. coli) and Staphylococcus aureus (S. aureus) within 10 and 5 min of contact, respectively. The antibacterial effect became more pronounced with the prolongation of chlorinated time, and it could achieve 99.9% bactericidal activity against E. coli within merely 1 min of contact.
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Affiliation(s)
- Ge Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Yuke Li
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Qining Ke
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Junchen Bai
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Fushuai Luo
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Jiacheng Zhang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Yanfen Ding
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Juan Chen
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Peng Liu
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
| | - Shu Wang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Chong Gao
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
| | - Mingshu Yang
- Beijing National Laboratory for Molecular Sciences, Key Laboratory of Engineering Plastic, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China
- School of Chemical Science, University of Chinese Academy of Sciences, Beijing, 100190, China
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2
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Ramachandra SS, Abdal-Hay A, Han P, Lee RSB, Ivanovski S. Fabrication and characterization of a 3D polymicrobial microcosm biofilm model using melt electrowritten scaffolds. BIOMATERIALS ADVANCES 2023; 145:213251. [PMID: 36580768 DOI: 10.1016/j.bioadv.2022.213251] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2022] [Revised: 11/19/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
The majority of current biofilm models or substrates are two-dimensional (2D) and support biofilm growth in the horizontal plane only. Three-dimensional (3D) substrates may support both horizontal and vertical biofilm growth. This study compared biofilm growth quantity and quality between highly porous 3D micrometric fibrous scaffolds and 2D film substrates fabricated from medical grade polycaprolactone (mPCL). Melt electrowriting (MEW), a high-resolution additive manufacturing technology, was employed to design orderly aligned fine (~12 μm) fibre-based 3D scaffolds, while 2D films were fabricated by a casting method. The 3D scaffolds with a controlled pore size of 100 and 250 μm and thickness of ~0.8 mm and 2D films were incubated in pooled saliva collected from six volunteers for 1, 2, 4, 7 and 10 days at 37 °C to facilitate polymicrobial biofilm formation. Crystal violet assay demonstrated greater biofilm biomass in 3D MEW scaffolds than in 2D films. Biofilm thickness in 3D scaffolds was significantly higher compared to the biofilm thickness in 2D films. Both biovolume and substratum coverage of the biofilms was higher in the 3D scaffolds compared to 2D films. Polymeric bridges, pores, and channels characteristic of biofilms could be demonstrated by scanning electron microscopy. 16S rRNA sequencing demonstrated that the polymicrobial biofilms in the 3D scaffolds were able to retain 60-70 % of the original inoculum microbiome after 4 days. The MEW-fabricated 3D fibrous scaffold is a promising substrate for supporting multidirectional biofilm growth and modelling of a polymicrobial microcosm.
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Affiliation(s)
- Srinivas Sulugodu Ramachandra
- School of Dentistry, Centre of Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), The University of Queensland, Brisbane, Australia; Department of Preventive Dental Sciences, College of Dentistry, Gulf Medical University, Ajman, United Arab Emirates
| | - Abdalla Abdal-Hay
- School of Dentistry, Centre of Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), The University of Queensland, Brisbane, Australia; Department of Engineering Materials and Mechanical Design, Faculty of Engineering, South Valley University, Qena, Egypt; Faculty of Industry and Energy Technology, Mechatronics Technology Program, New Cairo Technological University, New Cairo - Fifth Settlement, Cairo, Egypt
| | - Pingping Han
- School of Dentistry, Centre of Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), The University of Queensland, Brisbane, Australia
| | - Ryan S B Lee
- School of Dentistry, Centre of Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), The University of Queensland, Brisbane, Australia
| | - Sašo Ivanovski
- School of Dentistry, Centre of Orofacial Regeneration, Reconstruction and Rehabilitation (COR3), The University of Queensland, Brisbane, Australia.
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3
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Galstyan A, Majiya H, Dobrindt U. Regulation of photo triggered cytotoxicity in electrospun nanomaterials: role of photosensitizer binding mode and polymer identity. NANOSCALE ADVANCES 2021; 4:200-210. [PMID: 36132947 PMCID: PMC9418932 DOI: 10.1039/d1na00717c] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Accepted: 11/08/2021] [Indexed: 06/16/2023]
Abstract
Although electrospun nanomaterials containing photoactive dyes currently compete with the present state of art antimicrobial materials, relatively few structure-activity relationships have been established to identify the role of carrier polymer and photosensitizer binding mode on the performance of the materials. In this study scaffolds composed of poly(vinyl alcohol), polyacrylonitrile, poly(caprolactone), and tailor-made phthalocyanine-based photosensitizers are developed utilizing electrospinning as a simple, time and cost-effective method. The photoinduced activity of nanofibrous materials was characterized in vitro against E. coli and B. subtilis as models for Gram-negative and Gram-positive bacteria respectively, as well as against bacteriophages phi6 and MS2 as models for enveloped and non-enveloped viruses respectively. For the first time, we show how polymer-specific properties affect antifouling and antimicrobial activity of the nanofibrous material, indicating that the most promising way to increase efficiency is likely via methods that focus on increasing the number of short, but strong and reversible bacteria-surface interactions.
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Affiliation(s)
- Anzhela Galstyan
- Center for Soft Nanoscience Westfälische Wilhelms-Universität Münster Busso-Peus-Strasse 10 48149 Münster Germany
| | - Hussaini Majiya
- Department of Microbiology, Ibrahim Badamasi Babangida University KM3 Lapai-Minna Road, P.M.B 11 Lapai Nigeria
| | - Urlich Dobrindt
- Institut of Hygiene, Westfälische Wilhelms-Universität Münster Mendelstrasse 7 48149 Münster Germany
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Ramalingam R, Dhand C, Mayandi V, Leung CM, Ezhilarasu H, Karuppannan SK, Prasannan P, Ong ST, Sunderasan N, Kaliappan I, Kamruddin M, Barathi VA, Verma NK, Ramakrishna S, Lakshminarayanan R, Arunachalam KD. Core-Shell Structured Antimicrobial Nanofiber Dressings Containing Herbal Extract and Antibiotics Combination for the Prevention of Biofilms and Promotion of Cutaneous Wound Healing. ACS APPLIED MATERIALS & INTERFACES 2021; 13:24356-24369. [PMID: 34024104 DOI: 10.1021/acsami.0c20642] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Burn wounds are susceptible to microbial invasion from both resident and exogenous bacteria, which becomes a critical public health issue and causes substantial economic burden. There is a perceived demand to produce new antimicrobial wound dressings that hinder bacterial colonization while accelerating the healing process and hence would provide an improved standard of care for patients. Since ancient times, herbal extracts from medicinally important plants have extensively been used for treating burn injuries. This work reports the utility of electrospun nanofibers containing plant extracts and antibiotics combination as a multifunctional scaffold for treating second-degree burns. First, we determined the various components of plant extracts from Gymnema sylvestre by two different processing methods and their synergism with minocycline antibiotics. Then, we prepared core-shell nanofibrous dressings with poly-ε-caprolactone/gelatin laden with minocycline hydrochloride as a shell and gelatin infused with G. sylvestre extracts (ultrasound-assisted extracts and cold macerated extracts) as the core using coaxial electrospinning. The electrospun nanofibers displayed a smooth, continuous, and bead-free morphology with adequate wettability. The presence of extract components in the core-shell nanofibers resulted in enhanced mechanical properties when compared to pristine mats. The core-shell structures resulted in sustained release of the bioactive components when compared to nanofiber blends. Core-shell nanofiber mats containing plant extracts and antibiotic combinations displayed potent antimicrobial and antibiofilm properties while promoting the spread and proliferation of skin cells when compared to pristine mats. In a porcine model of cutaneous second-degree burns, we showed that wounds treated with the antimicrobial dressing improved re-epithelialization and collagen organization in comparison to untreated wounds.
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Affiliation(s)
- Raghavendra Ramalingam
- Center for Environmental Nuclear Research, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603203, India
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603203, India
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, 117576, Singapore
| | - Chetna Dhand
- Ocular Infections & Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, 169856, Singapore
- Industrial Waste Utilization, Nano and Biomaterials, CSIR-Advanced Materials and Processes Research Institute (CSIR-AMPRI), Bhopal, Madhya Pradesh 462026, India
| | - Venkatesh Mayandi
- Ocular Infections & Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, 169856, Singapore
- School of Biological Sciences, Nanyang Technological University Singapore, 60 Nanyang Drive, Singapore 637551, Singapore
| | - Chak Ming Leung
- Department of Biomedical Engineering, National University of Singapore, 117581, Singapore
- NUS Graduate School for Integrative Sciences & Engineering, National University of Singapore, 117456, Singapore
| | - Hariharan Ezhilarasu
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, 117576, Singapore
| | - Sathish Kumar Karuppannan
- Center for Environmental Nuclear Research, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603203, India
| | - Praseetha Prasannan
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Seow Theng Ong
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Nandhini Sunderasan
- Interdiscipilinary Institute of Indian System of Medicine, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu (Dt), Tamil Nadu 603203, India
| | - Ilango Kaliappan
- Department of Pharmaceutical Chemistry, SRM College of Pharmacy, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu (Dt), Tamil Nadu 603203, India
| | - Mohammed Kamruddin
- Materials Physics Division, Material Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, India
| | - Veluchamy Amutha Barathi
- Ocular Infections & Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, 169856, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, 169857, Singapore
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, 1E Kent Ridge Road, NUHS Tower Block, Level 7, 119228, Singapore
| | - Navin Kumar Verma
- Ocular Infections & Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, 169856, Singapore
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
- Skin Research Institute of Singapore, Clinical Sciences Building, 11 Mandalay Road, 308232, Singapore
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, 117576, Singapore
| | - Rajamani Lakshminarayanan
- Ocular Infections & Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, 169856, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, 169857, Singapore
- Department of Pharmacy, National University of Singapore, 18 Science Drive, 117543, Singapore
| | - Kantha Deivi Arunachalam
- Center for Environmental Nuclear Research, SRM Institute of Science and Technology, Kattankulathur, Chengalpattu, Tamil Nadu 603203, India
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5
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Sputter-Deposited Ag Nanoparticles on Electrospun PCL Scaffolds: Morphology, Wettability and Antibacterial Activity. COATINGS 2021. [DOI: 10.3390/coatings11030345] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Porous scaffolds made of biocompatible and environmental-friendly polymer fibers with diameters in the nano/micro range can find applications in a wide variety of sectors, spanning from the biomedical field to textiles and so on. Their development has received a boost in the last decades thanks to advances in the production methods, such as the electrospinning technique. Conferring antimicrobial properties to these fibrous structures is a primary requirement for many of their applications, but the addition of antimicrobial agents by wet methods can present a series of drawbacks. In this work, strong antibacterial action is successfully provided to electrospun polycaprolactone (PCL) scaffolds by silver (Ag) addition through a simple and flexible way, namely the sputtering deposition of silver onto the PCL fibers. SEM-EDS analyses demonstrate that the polymer fibers get coated by Ag nanoparticles without undergoing any alteration of their morphological integrity upon the deposition process. The influence on wettability is evaluated with polar (water) and non-polar (diiodomethane) liquids, evidencing that this coating method allows preserving the hydrophobic character of the PCL polymer. Excellent antibacterial action (reduction > 99.995% in 4 h) is demonstrated against Escherichia coli. The easy fabrication of these PCL-Ag mats can be applicable to the production of biomedical devices, bioremediation and antifouling systems in filtration, personal protective equipment (PPE), food packaging materials, etc.
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Verhorstert KW, Guler Z, de Boer L, Riool M, Roovers JPWR, Zaat SAJ. In Vitro Bacterial Adhesion and Biofilm Formation on Fully Absorbable Poly-4-hydroxybutyrate and Nonabsorbable Polypropylene Pelvic Floor Implants. ACS APPLIED MATERIALS & INTERFACES 2020; 12:53646-53653. [PMID: 33210919 PMCID: PMC7716345 DOI: 10.1021/acsami.0c14668] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 11/02/2020] [Indexed: 05/03/2023]
Abstract
Knitted polypropylene (PP) implants for the correction of pelvic organ prolapse have been associated with complications such as vaginal exposure, infection, and pain. Since certain complications may be linked to bacterial contamination and persistent inflammation, there is a rationale to develop a biocompatible implant that is less prone to bacterial adhesion and biofilm formation. Delayed absorbable materials could meet these requirements and poly-4-hydroxybutyrate (P4HB) might be such a new material for future pelvic floor implants. We studied in vitro bacterial adhesion and biofilm formation on P4HB in comparison to PP. We investigated the influence of both polymers using flat films and compared P4HB and PP implants with different knitting designs. P4HB flat films were demonstrated to be hydrophilic with significantly less Staphylococcus aureus and Escherichia coli cultured from P4HB films than from hydrophobic PP films after 24 h of incubation. On the implants, a higher number of E. coli were cultured after 1 h of incubation from the knitted P4HB implant with the highest density and smallest pore size, compared to other P4HB and PP implants. No differences were observed between the implants for E. coli at later time points or for S. aureus incubation. These results show that in flat films, the polymer influences biofilm formation, demonstrated by a reduced biofilm formation on P4HB compared with PP flat films. In addition, the knitting design may affect bacterial adhesion. Despite certain design and material characteristics that give the knitted P4HB implants a higher surface area, this did not result in more bacterial adhesion and biofilm formation overall. Collectively, these results warrant further (pre)clinical investigations of P4HB pelvic floor implants.
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Affiliation(s)
- Kim W.
J. Verhorstert
- Department
of Obstetrics and Gynecology, Amsterdam Reproduction and Development,
Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The
Netherlands
| | - Zeliha Guler
- Department
of Obstetrics and Gynecology, Amsterdam Reproduction and Development,
Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The
Netherlands
| | - Leonie de Boer
- Department
of Medical Microbiology and Infection Prevention, Amsterdam Institute
for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
| | - Martijn Riool
- Department
of Medical Microbiology and Infection Prevention, Amsterdam Institute
for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
| | - Jan-Paul W. R. Roovers
- Department
of Obstetrics and Gynecology, Amsterdam Reproduction and Development,
Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The
Netherlands
| | - Sebastian A. J. Zaat
- Department
of Medical Microbiology and Infection Prevention, Amsterdam Institute
for Infection and Immunity, Amsterdam UMC, University of Amsterdam, Meibergdreef 9, Amsterdam 1105 AZ, The Netherlands
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7
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Tamayo L, Melo F, Caballero L, Hamm E, Díaz M, Leal MS, Guiliani N, Urzúa MD. Does Bacterial Elasticity Affect Adhesion to Polymer Fibers? ACS APPLIED MATERIALS & INTERFACES 2020; 12:14507-14517. [PMID: 32118396 DOI: 10.1021/acsami.9b21060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The factors governing bacterial adhesion to substrates with different topographies are still not fully identified. The present work seeks to elucidate for the first time and with quantitative data the roles of bacterial elasticity and shape and substrate topography in bacterial adhesion. With this aim, populations of three bacterial species, P. aeruginosa DSM 22644, B. subtilis DSM 10, and S. aureus DSM 20231 adhered on flat substrates covered with electrospun polycaprolactone fibers of different diameters ranging from 0.4 to 5.5 μm are counted. Populations of bacterial cells are classified according to the preferred binding sites of the bacteria to the substrate. The colloidal probe technique was used to assess the stiffness of the bacteria and bacteria-polymer surface adhesion energy. A theoretical model is developed to interpret the observed populations in terms of a balance between stiffness and adhesion energy of the bacteria. The model, which also incorporates the radius of the fiber and the size and shape of the bacteria, predicts increased adhesion for a low level of stiffness and for a larger number of available bacteria-fiber contact points. Te adhesive propensity of bacteria depends in a nontrivial way on the radius of the fibers due to the random arrangement of fibers.
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Affiliation(s)
- Laura Tamayo
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras, Santiago 3425, Chile
| | - Francisco Melo
- Departamento Física, Facultad de Ciencia, Universidad de Santiago de Chile, Avenida Ecuador, Santiago 3493, Chile
- Center for Soft Matter Research, SMAT-C, Avenida Libertador Bernardo O'Higgins, Santiago 3363, Chile
| | - Leonardo Caballero
- Departamento Física, Facultad de Ciencia, Universidad de Santiago de Chile, Avenida Ecuador, Santiago 3493, Chile
- Center for Soft Matter Research, SMAT-C, Avenida Libertador Bernardo O'Higgins, Santiago 3363, Chile
| | - Eugenio Hamm
- Departamento Física, Facultad de Ciencia, Universidad de Santiago de Chile, Avenida Ecuador, Santiago 3493, Chile
| | - M Díaz
- Laboratorio de Comunicación Bacteriana, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Las Palmeras, Ñuñoa, Santiago 3425, Chile
| | - M S Leal
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras, Santiago 3425, Chile
| | - N Guiliani
- Laboratorio de Comunicación Bacteriana, Departamento de Biología, Facultad de Ciencias, Universidad de Chile, Las Palmeras, Ñuñoa, Santiago 3425, Chile
| | - M D Urzúa
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Las Palmeras, Santiago 3425, Chile
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8
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Simcox LJ, Pereira RPA, Wellington EMH, Macpherson JV. Boron Doped Diamond as a Low Biofouling Material in Aquatic Environments: Assessment of Pseudomonas aeruginosa Biofilm Formation. ACS APPLIED MATERIALS & INTERFACES 2019; 11:25024-25033. [PMID: 31260250 DOI: 10.1021/acsami.9b07245] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Boron doped diamond (BDD), given the robustness of the material, is becoming an electrode of choice for applications which require long-term electrochemical monitoring of analytes in aqueous environments. However, despite the extensive work in this area, there are no studies which directly assess the biofilm formation (biofouling) capabilities of the material, which is an essential consideration because biofouling often causes deterioration in the sensor performance. Pseudomonas aeruginosa is one of the most prevalent bacterial pathogens linked to water-related diseases, with a strong capacity for forming biofilms on surfaces that are exposed to aquatic environments. In this study, we comparatively evaluate the biofouling capabilities of oxygen-terminated (O-)BDD against materials commonly employed as either the packaging or sensing element in water quality sensors, with an aim to identify factors which control biofilm formation on BDD. We assess the monospecies biofilm formation of P. aeruginosa in two different growth media, Luria-Bertani, a high nutrient source and drinking water, a low nutrient source, at two different temperatures (20 and 37 °C). Multispecies biofilm formation is also investigated. The performance of O-BDD, when tested against all other materials, promotes the lowest extent of P. aeruginosa monospecies biofilm formation, even with corrections made for total surface area (roughness). Importantly, O-BDD shows the lowest water contact angle of all materials tested, that is, greatest hydrophilicity, strongly suggesting that for these bacterial species, the factors controlling the hydrophilicity of the surface are important in reducing bacterial adhesion. This was further proven by keeping the surface topography fixed and changing surface termination to hydrogen (H-), to produce a strongly hydrophobic surface. A noticeable increase in biofilm formation was found. Doping with boron also results in changes in hydrophobicity/hydrophilicity compared to the undoped counterpart, which in turn affects the bacterial growth. For practical electrochemical sensing applications in aquatic environments, this study highlights the extremely beneficial effects of employing smooth, O-terminated (hydrophilic) BDD electrodes.
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Ma Y, Li J, Si Y, Huang K, Nitin N, Sun G. Rechargeable Antibacterial N-Halamine Films with Antifouling Function for Food Packaging Applications. ACS APPLIED MATERIALS & INTERFACES 2019; 11:17814-17822. [PMID: 31022343 DOI: 10.1021/acsami.9b03464] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Pathogenic microbial contamination from microbial adhesion and subsequent formation of the biofilm on surfaces of plastic food packaging materials, especially with robust resistance to antimicrobial agents, is a major reason for the outbreak of foodborne infections. Conventional strategies in controlling the contaminations are significantly limited either by biofouling or by the irreversible consumption of antimicrobial agents. Herein, we report a robust methodology to create rechargeable biocidal poly(vinyl alcohol- co-ethylene) films (SBMA@HAF films) with antifouling function via chemically incorporating both N-halamine (HAF) and zwitterionic moieties [[2-(methacryloyloxy)ethyl]dimethyl-(3-sulfopropyl)ammonium hydroxide (SBMA)]. The promise of the design exhibits three features to defeat bacterial contaminations: (i) zwitterionic moieties can effectively reduce bacterial attachment onto the films, (ii) N-halamine with robust rechargeable biocidal activity can rapidly kill any attached bacteria, and (iii) any inactivated bacterial debris can be easily released to avoid biofilm formation due to the superhydrophilicity of the zwitterions. The resulting SBMA@HAF films exhibit integrated properties of high transparency, robust mechanical property, great hydrophilicity, ease of chlorine recharging (>250 ppm), long-term stability, high biocidal efficacy (>99.9999% via contact killing), and promising antifouling functions, which enable the SBMA@HAF films to serve as a biocidal material in food packaging applications.
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10
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Ramalingam R, Dhand C, Leung CM, Ezhilarasu H, Prasannan P, Ong ST, Subramanian S, Kamruddin M, Lakshminarayanan R, Ramakrishna S, Verma NK, Arunachalam KD. Poly-ε-Caprolactone/Gelatin Hybrid Electrospun Composite Nanofibrous Mats Containing Ultrasound Assisted Herbal Extract: Antimicrobial and Cell Proliferation Study. NANOMATERIALS (BASEL, SWITZERLAND) 2019; 9:E462. [PMID: 30897714 PMCID: PMC6474082 DOI: 10.3390/nano9030462] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 02/25/2019] [Accepted: 03/01/2019] [Indexed: 01/23/2023]
Abstract
Electrospun fibers have emerged as promising materials in the field of biomedicine, due to their superior physical and cell supportive properties. In particular, electrospun mats are being developed for advanced wound dressing applications. Such applications require the firers to possess excellent antimicrobial properties in order to inhibit potential microbial colonization from resident and non-resident bacteria. In this study, we have developed Poly-ε-Caprolactone /gelatin hybrid composite mats loaded with natural herbal extract (Gymnema sylvestre) to prevent bacterial colonization. As-spun scaffolds exhibited good wettability and desirable mechanical properties retaining their fibrous structure after immersing them in phosphate buffered saline (pH 7.2) for up to 30 days. The initial burst release of Gymnema sylvestre prevented the colonization of bacteria as confirmed by the radial disc diffusion assay. Furthermore, the electrospun mats promoted cellular attachment, spreading and proliferation of human primary dermal fibroblasts and cultured keratinocytes, which are crucial parenchymal cell-types involved in the skin recovery process. Overall these results demonstrated the utility of Gymnema sylvestre impregnated electrospun PCL/Gelatin nanofibrous mats as an effective antimicrobial wound dressing.
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Affiliation(s)
- Raghavendra Ramalingam
- Center for Environmental Nuclear Research, SRM Institute of Science and Technology, Kattankulathur Campus, Kancheepuram, Tamilnadu 603203, India.
- Department of Physics and Nanotechnology, SRM Institute of Science and Technology, Kattankulathur Campus, Kancheepuram, Tamilnadu 603203, India.
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, Singapore 117576, Singapore.
| | - Chetna Dhand
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, Singapore 169856, Singapore.
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore 169857, Singapore.
| | - Chak Ming Leung
- Department of Biomedical Engineering, National University of Singapore, Singapore 117581, Singapore.
| | - Hariharan Ezhilarasu
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, Singapore 117576, Singapore.
| | - Praseetha Prasannan
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Experimental Medicine Building, 59 Nanyang Drive, Singapore 636921, Singapore.
| | - Seow Theng Ong
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Experimental Medicine Building, 59 Nanyang Drive, Singapore 636921, Singapore.
| | - Sundarapandian Subramanian
- Department of Anatomy, SRM Medical College Hospital and Research Centre, Kattankulathur Campus, Kancheepuram, Tamilnadu 603203, India.
| | - Mohammed Kamruddin
- Materials Physics Division, Material Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam, Tamilnadu 603102, India.
| | - Rajamani Lakshminarayanan
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, Singapore 169856, Singapore.
- Ophthalmology and Visual Sciences Academic Clinical Program, Duke-NUS Graduate Medical School, Singapore 169857, Singapore.
| | - Seeram Ramakrishna
- Center for Nanofibers and Nanotechnology, Department of Mechanical Engineering, Faculty of Engineering, 2 Engineering Drive 3, National University of Singapore, Singapore 117576, Singapore.
| | - Navin Kumar Verma
- Anti-Infectives Research Group, Singapore Eye Research Institute, The Academia, 20 College Road, Discovery Tower, Singapore 169856, Singapore.
- Lee Kong Chian School of Medicine, Nanyang Technological University Singapore, Experimental Medicine Building, 59 Nanyang Drive, Singapore 636921, Singapore.
- Skin Research Institute of Singapore, 8A Biomedical Grove, #06-06 Immunos, Singapore 138648, Singapore.
| | - Kantha Deivi Arunachalam
- Center for Environmental Nuclear Research, SRM Institute of Science and Technology, Kattankulathur Campus, Kancheepuram, Tamilnadu 603203, India.
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Zhou X, Shi G, Fan B, Cheng X, Zhang X, Wang X, Liu S, Hao Y, Wei Z, Wang L, Feng S. Polycaprolactone electrospun fiber scaffold loaded with iPSCs-NSCs and ASCs as a novel tissue engineering scaffold for the treatment of spinal cord injury. Int J Nanomedicine 2018; 13:6265-6277. [PMID: 30349249 PMCID: PMC6186894 DOI: 10.2147/ijn.s175914] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Background Spinal cord injury (SCI) is a traumatic disease of the central nervous system, accompanied with high incidence and high disability rate. Tissue engineering scaffold can be used as therapeutic systems to provide effective repair for SCI. Purpose In this study, a novel tissue engineering scaffold has been synthesized in order to explore the effect of nerve repair on SCI. Patients and methods Polycaprolactone (PCL) scaffolds loaded with actived Schwann cells (ASCs) and induced pluripotent stem cells -derived neural stem cells (iPSC-NSCs), a combined cell transplantation strategy, were prepared and characterized. The cell-loaded PCL scaffolds were further utilized for the treatment of SCI in vivo. Histological observation, behavioral evaluation, Western-blot and qRT-PCR were used to investigate the nerve repair of Wistar rats after scaffold transplantation. Results The iPSCs displayed similar characteristics to embryonic stem cells and were efficiently differentiated into neural stem cells in vitro. The obtained PCL scaffolds werê0.5 mm in thickness with biocompatibility and biodegradability. SEM results indicated that the ASCs and (or) iPS-NSCs grew well on PCL scaffolds. Moreover, transplantation reduced the volume of lesion cavity and improved locomotor recovery of rats. In addition, the degree of spinal cord recovery and remodeling maybe closely related to nerve growth factor and glial cell-derived neurotrophic factor. In summary, our results demonstrated that tissue engineering scaffold treatment could increase tissue remodeling and could promote motor function recovery in a transection SCI model. Conclusion This study provides preliminary evidence for using tissue engineering scaffold as a clinically viable treatment for SCI in the future.
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Affiliation(s)
- XianHu Zhou
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China,
| | - GuiDong Shi
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China,
| | - BaoYou Fan
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - Xin Cheng
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - XiaoLei Zhang
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - Xu Wang
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - Shen Liu
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - Yan Hao
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - ZhiJian Wei
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
| | - LianYong Wang
- Key Laboratory of Bioactive Materials, Ministry of Education, College of Life Sciences, Nankai University, Tianjin, People's Republic of China,
| | - ShiQing Feng
- International Science and Technology Cooperation Base of Spinal Cord Injury, Department of Orthopedic Surgery, Tianjin Medical University General Hospital, Tianjin, People's Republic of China, .,Tianjin Neurological Institute, Key Laboratory of Post-Neuroinjury Neuro-repair and Regeneration in Central Nervous System, Ministry of Education and Tianjin City, Tianjin, People's Republic of China,
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Tamayo-Ramos JA, Rumbo C, Caso F, Rinaldi A, Garroni S, Notargiacomo A, Romero-Santacreu L, Cuesta-López S. Analysis of Polycaprolactone Microfibers as Biofilm Carriers for Biotechnologically Relevant Bacteria. ACS APPLIED MATERIALS & INTERFACES 2018; 10:32773-32781. [PMID: 30168313 DOI: 10.1021/acsami.8b07245] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Polymeric electrospun fibers are becoming popular in microbial biotechnology because of their exceptional physicochemical characteristics, biodegradability, surface-to-volume ratio, and compatibility with biological systems, which give them a great potential as microbial supports to be used in production processes or environmental applications. In this work, we analyzed and compared the ability of Escherichia coli, Pseudomonas putida, Brevundimonas diminuta, and Sphingobium fuliginis to develop biofilms on different types of polycaprolactone (PCL) microfibers. These bacterial species are relevant in the production of biobased chemicals, enzymes, and proteins for therapeutic use and bioremediation. The obtained results demonstrated that all selected species were able to attach efficiently to the PCL microfibers. Also, the ability of pure cultures of S. fuliginis (former Flavobacterium sp. ATCC 27551, a very relevant strain in the bioremediation of organophosphorus compounds) to form dense biofilms was observed for the first time, opening the possibility of new applications for this microorganism. This material showed to have a high microbial loading capacity, regardless of the mesh density and fiber diameter. A comparative analysis between PCL and polylactic acid (PLA) electrospun microfibers indicated that both surfaces have a similar bacterial loading capacity, but the former material showed higher resistance to microbial degradation than PLA.
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Affiliation(s)
- Juan Antonio Tamayo-Ramos
- International Research Centre in Critical Raw Materials-ICCRAM , University of Burgos , Plaza Misael Banuelos s/n , 09001 Burgos , Spain
| | - Carlos Rumbo
- International Research Centre in Critical Raw Materials-ICCRAM , University of Burgos , Plaza Misael Banuelos s/n , 09001 Burgos , Spain
- Departamento de Química, Facultad de Ciencias , University of Burgos , Plaza Misael Bañuelos s/n , 09001 Burgos , Spain
| | - Federica Caso
- Nanofaber srl. , Via Anguillarese 301 , 00123 Rome , Italy
| | - Antonio Rinaldi
- Italian National Agency for New Technologies, Energy and Sustainable Economic Development (ENEA) , Casaccia Research Centre , Via Anguillarese 301 , 00123 Rome , Italy
| | - Sebastiano Garroni
- International Research Centre in Critical Raw Materials-ICCRAM , University of Burgos , Plaza Misael Banuelos s/n , 09001 Burgos , Spain
| | - Andrea Notargiacomo
- Institute for Photonics and Nanotechnology , CNR , Via Cineto Romano 42 , 00156 Rome , Italy
| | - Lorena Romero-Santacreu
- International Research Centre in Critical Raw Materials-ICCRAM , University of Burgos , Plaza Misael Banuelos s/n , 09001 Burgos , Spain
- Advanced Materials, Nuclear Technology and Applied Bio/Nanotechnology, Consolidated Research Unit UIC-154 , University of Burgos , Hospital del Rey s/n , Burgos , 09001 , Castilla y León, Spain
| | - Santiago Cuesta-López
- International Research Centre in Critical Raw Materials-ICCRAM , University of Burgos , Plaza Misael Banuelos s/n , 09001 Burgos , Spain
- Advanced Materials, Nuclear Technology and Applied Bio/Nanotechnology, Consolidated Research Unit UIC-154 , University of Burgos , Hospital del Rey s/n , Burgos , 09001 , Castilla y León, Spain
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