51
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Wang Z, Dong K, Liu Z, Zhang Y, Chen Z, Sun H, Ren J, Qu X. Activation of biologically relevant levels of reactive oxygen species by Au/g-C3N4 hybrid nanozyme for bacteria killing and wound disinfection. Biomaterials 2017; 113:145-157. [DOI: 10.1016/j.biomaterials.2016.10.041] [Citation(s) in RCA: 242] [Impact Index Per Article: 34.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2016] [Revised: 10/21/2016] [Accepted: 10/27/2016] [Indexed: 01/28/2023]
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52
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Yan S, Song L, Luan S, Xin Z, Du S, Shi H, Yuan S, Yang Y, Yin J. A hierarchical polymer brush coating with dual-function antibacterial capability. Colloids Surf B Biointerfaces 2017; 149:260-270. [DOI: 10.1016/j.colsurfb.2016.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 07/18/2016] [Accepted: 08/11/2016] [Indexed: 01/27/2023]
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53
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Magennis EP, Hook A, Williams P, Alexander MR. Making Silicone Rubber Highly Resistant to Bacterial Attachment Using Thiol-ene Grafting. ACS APPLIED MATERIALS & INTERFACES 2016; 8:30780-30787. [PMID: 27775316 PMCID: PMC5138009 DOI: 10.1021/acsami.6b10986] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Biomedical devices are indispensable in modern medicine yet offer surfaces that promote bacterial attachment and biofilm formation, resulting in acute and chronic healthcare-associated infections. We have developed a simple method to graft acrylates to silicone rubber, polydimethylsiloxane (PDMS), a commonly used device material that is often colonized by bacteria. We demonstrate a novel method whereby nontoxic bacteria attachment-resistant polymers can be readily grafted from and grafted to the surface using thiol-ene chemistry, substantially reducing bacterial colonization. With use of this approach, bacterial biofilm coverage can be reduced by 99% compared with standard PDMS in an in vitro assay. This grafting approach offers significant advantages over commonly used physisorbed coatings, especially in areas of high shear or mechanical stress. Furthermore, the approach is versatile such that the grafted material properties can be tailored for the desired final application.
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Affiliation(s)
- E. Peter Magennis
- Advanced Materials and Healthcare Technologies, School of Pharmacy, and Centre for Biomolecular
Sciences, School of Life Sciences, University
of Nottingham, Nottingham, U.K.
| | - Andrew
L. Hook
- Advanced Materials and Healthcare Technologies, School of Pharmacy, and Centre for Biomolecular
Sciences, School of Life Sciences, University
of Nottingham, Nottingham, U.K.
| | - Paul Williams
- Advanced Materials and Healthcare Technologies, School of Pharmacy, and Centre for Biomolecular
Sciences, School of Life Sciences, University
of Nottingham, Nottingham, U.K.
| | - Morgan R. Alexander
- Advanced Materials and Healthcare Technologies, School of Pharmacy, and Centre for Biomolecular
Sciences, School of Life Sciences, University
of Nottingham, Nottingham, U.K.
- Room C07, Boots Science Building, University
Park, Nottingham NG7 2RD, U.K. (M.R.A.). E-mail:
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54
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Adlington K, Nguyen NT, Eaves E, Yang J, Chang CY, Li J, Gower AL, Stimpson A, Anderson DG, Langer R, Davies MC, Hook AL, Williams P, Alexander MR, Irvine DJ. Application of Targeted Molecular and Material Property Optimization to Bacterial Attachment-Resistant (Meth)acrylate Polymers. Biomacromolecules 2016; 17:2830-8. [PMID: 27461341 DOI: 10.1021/acs.biomac.6b00615] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Developing medical devices that resist bacterial attachment and subsequent biofilm formation is highly desirable. In this paper, we report the optimization of the molecular structure and thus material properties of a range of (meth)acrylate copolymers which contain monomers reported to deliver bacterial resistance to surfaces. This optimization allows such monomers to be employed within novel coatings to reduce bacterial attachment to silicone urinary catheters. We show that the flexibility of copolymers can be tuned to match that of the silicone catheter substrate, by copolymerizing these polymers with a lower Tg monomer such that it passes the flexing fatigue tests as coatings upon catheters, that the homopolymers failed. Furthermore, the Tg values of the copolymers are shown to be readily estimated by the Fox equation. The bacterial resistance performance of these copolymers were typically found to be better than the neat silicone or a commercial silver containing hydrogel surface, when the monomer feed contained only 25 v% of the "hit" monomer. The method of initiation (either photo or thermal) was shown not to affect the bacterial resistance of the copolymers. Optimized synthesis conditions to ensure that the correct copolymer composition and to prevent the onset of gelation are detailed.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Daniel G Anderson
- Department of Chemical Engineering, Institute for Medical Engineering and Science, Harvard-MIT Division of Health Sciences and Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology , 500 Main Street, Cambridge, Massachusetts 02139, United States
| | - Robert Langer
- Department of Chemical Engineering, Institute for Medical Engineering and Science, Harvard-MIT Division of Health Sciences and Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology , 500 Main Street, Cambridge, Massachusetts 02139, United States
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55
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Kanasty RL, Vegas AJ, Ceo LM, Maier M, Charisse K, Nair JK, Langer R, Anderson DG. Sequence-Defined Oligomers from Hydroxyproline Building Blocks for Parallel Synthesis Applications. Angew Chem Int Ed Engl 2016; 55:9529-33. [PMID: 27365192 PMCID: PMC5245870 DOI: 10.1002/anie.201602748] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 05/04/2016] [Indexed: 01/01/2023]
Abstract
The functionality of natural biopolymers has inspired significant effort to develop sequence-defined synthetic polymers for applications including molecular recognition, self-assembly, and catalysis. Conjugation of synthetic materials to biomacromolecules has played an increasingly important role in drug delivery and biomaterials. We developed a controlled synthesis of novel oligomers from hydroxyproline-based building blocks and conjugated these materials to siRNA. Hydroxyproline-based monomers enable the incorporation of broad structural diversity into defined polymer chains. Using a perfluorocarbon purification handle, we were able to purify diverse oligomers through a single solid-phase extraction method. The efficiency of synthesis was demonstrated by building 14 unique trimers and 4 hexamers from 6 diverse building blocks. We then adapted this method to the parallel synthesis of hundreds of materials in 96-well plates. This strategy provides a platform for the screening of libraries of modified biomolecules.
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Affiliation(s)
- Rosemary L Kanasty
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main St., Cambridge, MA, 02142, USA
| | - Arturo J Vegas
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main St., Cambridge, MA, 02142, USA
- Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA, 02115, USA
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA
| | - Luke M Ceo
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main St., Cambridge, MA, 02142, USA
- Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA, 02115, USA
- Department of Chemistry, Boston University, 590 Commonwealth Avenue, Boston, MA, 02215, USA
| | - Martin Maier
- Alnylam Pharmaceuticals, 300 Third Street, Cambridge, MA, 02142, USA
| | - Klaus Charisse
- Alnylam Pharmaceuticals, 300 Third Street, Cambridge, MA, 02142, USA
| | | | - Robert Langer
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main St., Cambridge, MA, 02142, USA
- Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA, 02115, USA
- Division of Health Science Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
- Harvard-MIT Division of Health Science and Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA
| | - Daniel G Anderson
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
- David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 500 Main St., Cambridge, MA, 02142, USA.
- Department of Anesthesiology, Boston Children's Hospital, 300 Longwood Ave, Boston, MA, 02115, USA.
- Division of Health Science Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
- Institute for Medical Engineering and Science, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
- Harvard-MIT Division of Health Science and Technology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
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56
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Kanasty RL, Vegas AJ, Ceo LM, Maier M, Charisse K, Nair JK, Langer R, Anderson DG. Sequence-Defined Oligomers from Hydroxyproline Building Blocks for Parallel Synthesis Applications. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201602748] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Rosemary L. Kanasty
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- David H. Koch Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main St. Cambridge MA 02142 USA
| | - Arturo J. Vegas
- David H. Koch Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main St. Cambridge MA 02142 USA
- Department of Anesthesiology; Boston Children's Hospital; 300 Longwood Ave Boston MA 02115 USA
- Department of Chemistry; Boston University; 590 Commonwealth Avenue Boston MA 02215 USA
| | - Luke M. Ceo
- David H. Koch Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main St. Cambridge MA 02142 USA
- Department of Anesthesiology; Boston Children's Hospital; 300 Longwood Ave Boston MA 02115 USA
- Department of Chemistry; Boston University; 590 Commonwealth Avenue Boston MA 02215 USA
| | - Martin Maier
- Alnylam Pharmaceuticals; 300 Third Street Cambridge MA 02142 USA
| | - Klaus Charisse
- Alnylam Pharmaceuticals; 300 Third Street Cambridge MA 02142 USA
| | | | - Robert Langer
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- David H. Koch Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main St. Cambridge MA 02142 USA
- Department of Anesthesiology; Boston Children's Hospital; 300 Longwood Ave Boston MA 02115 USA
- Division of Health Science Technology; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- Institute for Medical Engineering and Science; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA. Harvard-MIT Division of Health Science and Technology; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
| | - Daniel G. Anderson
- Department of Chemical Engineering; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- David H. Koch Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main St. Cambridge MA 02142 USA
- Department of Anesthesiology; Boston Children's Hospital; 300 Longwood Ave Boston MA 02115 USA
- Division of Health Science Technology; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- Institute for Medical Engineering and Science; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA. Harvard-MIT Division of Health Science and Technology; Massachusetts Institute of Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
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57
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Magennis EP, Hook AL, Davies MC, Alexander C, Williams P, Alexander MR. Engineering serendipity: High-throughput discovery of materials that resist bacterial attachment. Acta Biomater 2016; 34:84-92. [PMID: 26577984 PMCID: PMC4824014 DOI: 10.1016/j.actbio.2015.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 10/23/2015] [Accepted: 11/06/2015] [Indexed: 12/31/2022]
Abstract
Controlling the colonisation of materials by microorganisms is important in a wide range of industries and clinical settings. To date, the underlying mechanisms that govern the interactions of bacteria with material surfaces remain poorly understood, limiting the ab initio design and engineering of biomaterials to control bacterial attachment. Combinatorial approaches involving high-throughput screening have emerged as key tools for identifying materials to control bacterial attachment. The hundreds of different materials assessed using these methods can be carried out with the aid of computational modelling. This approach can develop an understanding of the rules used to predict bacterial attachment to surfaces of non-toxic synthetic materials. Here we outline our view on the state of this field and the challenges and opportunities in this area for the coming years. STATEMENT OF SIGNIFICANCE This opinion article on high throughput screening methods reflects one aspect of how the field of biomaterials research has developed and progressed. The piece takes the reader through key developments in biomaterials discovery, particularly focusing on need to reduce bacterial colonisation of surfaces. Such bacterial resistant surfaces are increasingly required in this age of antibiotic resistance. The influence and origin of high-throughput methods are discussed with insights into the future of biomaterials development where computational methods may drive materials development into new fertile areas of discovery. New biomaterials will exhibit responsiveness to adapt to the biological environment and promote better integration and reduced rejection or infection.
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Affiliation(s)
- E P Magennis
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, UK.
| | - A L Hook
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, UK.
| | - M C Davies
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, UK.
| | - C Alexander
- Drug Delivery and Tissue Engineering, School of Pharmacy, University of Nottingham, Nottingham, UK.
| | - P Williams
- School of Molecular Medical Sciences, University of Nottingham, Nottingham, UK.
| | - M R Alexander
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, UK.
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58
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Hook AL, Scurr DJ. ToF-SIMS analysis of a polymer microarray composed of poly(meth)acrylates with C 6 derivative pendant groups. SURF INTERFACE ANAL 2016; 48:226-236. [PMID: 27134321 PMCID: PMC4832844 DOI: 10.1002/sia.5959] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2015] [Revised: 01/18/2016] [Accepted: 01/19/2016] [Indexed: 12/12/2022]
Abstract
Surface analysis plays a key role in understanding the function of materials, particularly in biological environments. Time‐of‐flight secondary ion mass spectrometry (ToF‐SIMS) provides highly surface sensitive chemical information that can readily be acquired over large areas and has, thus, become an important surface analysis tool. However, the information‐rich nature of ToF‐SIMS complicates the interpretation and comparison of spectra, particularly in cases where multicomponent samples are being assessed. In this study, a method is presented to assess the chemical variance across 16 poly(meth)acrylates. Materials are selected to contain C6 pendant groups, and ten replicates of each are printed as a polymer microarray. SIMS spectra are acquired for each material with the most intense and unique ions assessed for each material to identify the predominant and distinctive fragmentation pathways within the materials studied. Differentiating acrylate/methacrylate pairs is readily achieved using secondary ions derived from both the polymer backbone and pendant groups. Principal component analysis (PCA) is performed on the SIMS spectra of the 16 polymers, whereby the resulting principal components are able to distinguish phenyl from benzyl groups, mono‐functional from multi‐functional monomers and acrylates from methacrylates. The principal components are applied to copolymer series to assess the predictive capabilities of the PCA. Beyond being able to predict the copolymer ratio, in some cases, the SIMS analysis is able to provide insight into the molecular sequence of a copolymer. The insight gained in this study will be beneficial for developing structure–function relationships based upon ToF‐SIMS data of polymer libraries. © 2016 The Authors Surface and Interface Analysis Published by John Wiley & Sons Ltd.
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Affiliation(s)
- Andrew L Hook
- Laboratory of Biophysics and Surface Analysis University of Nottingham Nottingham NG7 2RD UK
| | - David J Scurr
- Laboratory of Biophysics and Surface Analysis University of Nottingham Nottingham NG7 2RD UK
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59
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Crowder SW, Leonardo V, Whittaker T, Papathanasiou P, Stevens MM. Material Cues as Potent Regulators of Epigenetics and Stem Cell Function. Cell Stem Cell 2016; 18:39-52. [PMID: 26748755 PMCID: PMC5409508 DOI: 10.1016/j.stem.2015.12.012] [Citation(s) in RCA: 169] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Biophysical signals act as potent regulators of stem cell function, lineage commitment, and epigenetic status. In recent years, synthetic biomaterials have been used to study a wide range of outside-in signaling events, and it is now well appreciated that material cues modulate the epigenome. Here, we review the role of extracellular signals in guiding stem cell behavior via epigenetic regulation, and we stress the role of physicochemical material properties as an often-overlooked modulator of intracellular signaling. We also highlight promising new research tools for ongoing interrogation of the stem cell-material interface.
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Affiliation(s)
- Spencer W Crowder
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Institute for Biomedical Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Vincent Leonardo
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Institute for Biomedical Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Thomas Whittaker
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Institute for Biomedical Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Peter Papathanasiou
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK
| | - Molly M Stevens
- Department of Materials, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Department of Bioengineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK; Institute for Biomedical Engineering, Imperial College London, Prince Consort Road, London SW7 2AZ, UK.
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60
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Abstract
In this chapter the state of the art of live cell microarrays for high-throughput biological assays are reviewed. The fabrication of novel microarrays with respect to material science and cell patterning methods is included. A main focus of the chapter is on various aspects of the application of cell microarrays by providing selected examples in research fields such as biomaterials, stem cell biology and neuroscience. Additionally, the importance of microfluidic technologies for high-throughput on-chip live-cell microarrays is highlighted for single-cell and multi-cell assays as well as for 3D tissue constructs.
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61
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Wang W, Wang Z, Bu X, Li R, Zhou M, Hu Z. Discovering of Tumor-targeting Peptides using Bi-functional Microarray. Adv Healthc Mater 2015; 4:2802-8. [PMID: 26548577 DOI: 10.1002/adhm.201500724] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Indexed: 01/06/2023]
Abstract
A bi-functional microarray for in situ peptide screening is presented herein, from which an affinity peptide towards EpCAM is screened out for tumor cell capture.
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Affiliation(s)
- Weizhi Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety; National Center for Nanoscience and Technology of China; Beijing 100190 China
| | - Zihua Wang
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety; National Center for Nanoscience and Technology of China; Beijing 100190 China
| | - Xiangli Bu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety; National Center for Nanoscience and Technology of China; Beijing 100190 China
| | - Ren Li
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety; National Center for Nanoscience and Technology of China; Beijing 100190 China
| | - Mingxing Zhou
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety; National Center for Nanoscience and Technology of China; Beijing 100190 China
| | - Zhiyuan Hu
- CAS Key Laboratory for Biomedical Effects of Nanomaterials & Nanosafety; National Center for Nanoscience and Technology of China; Beijing 100190 China
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62
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Lu Y, Yue Z, Wang W, Cao Z. Strategies on designing multifunctional surfaces to prevent biofilm formation. Front Chem Sci Eng 2015. [DOI: 10.1007/s11705-015-1529-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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63
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Sanni O, Chang CY, Anderson DG, Langer R, Davies MC, Williams PM, Williams P, Alexander MR, Hook* AL. Bacterial attachment to polymeric materials correlates with molecular flexibility and hydrophilicity. Adv Healthc Mater 2015; 4:695-701. [PMID: 25491266 PMCID: PMC4409840 DOI: 10.1002/adhm.201400648] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2014] [Revised: 11/19/2014] [Indexed: 12/26/2022]
Abstract
A new class of material resistant to bacterial attachment has been discovered that is formed from polyacrylates with hydrocarbon pendant groups. In this study, the relationship between the nature of the hydrocarbon moiety and resistance to bacteria is explored, comparing cyclic, aromatic, and linear chemical groups. A correlation is shown between bacterial attachment and a parameter derived from the partition coefficient and the number of rotatable bonds of the materials' pendant groups. This correlation is applicable to 86% of the hydrocarbon pendant moieties surveyed, quantitatively supporting the previous qualitative observation that bacteria are repelled from poly(meth)acrylates containing a hydrophilic ester group when the pendant group is both rigid and hydrophobic. This insight will help inform and predict the further development of polymers resistant to bacterial attachment.
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Affiliation(s)
- Olutoba Sanni
- School of Pharmacy University of Rome, Tor VergataVia Della Ricerca Scientifica 1, Rome, 00133, Italy
| | - Chien-Yi Chang
- The Centre for Bacterial Cell Biology, Medical School, Newcastle UniversityNewcastle upon Tyne, NE2 4AX, UK
- Interdisciplinary Computing and Complex BioSystems (ICOS) research group, School of Computing Science, Newcastle UniversityNewcastle upon Tyne, NE1 7RU, UK
| | - Daniel G Anderson
- Department of Chemical Engineering, Institute for Medical Engineering and Science, Harvard-MIT Division of Health Sciences and Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology500 Main Street, Cambridge, MA, 02139, USA
| | - Robert Langer
- Department of Chemical Engineering, Institute for Medical Engineering and Science, Harvard-MIT Division of Health Sciences and Technology, David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology500 Main Street, Cambridge, MA, 02139, USA
| | - Martyn C Davies
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of NottinghamNottingham, NG72RD, UK
| | - Philip M Williams
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of NottinghamNottingham, NG72RD, UK
| | - Paul Williams
- School of Life Sciences, Centre for Biomolecular Sciences, University of NottinghamNottingham, NG72RD, UK
| | - Morgan R Alexander
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of NottinghamNottingham, NG72RD, UK
| | - Andrew L Hook*
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of NottinghamNottingham, NG72RD, UK
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64
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Appel EA, Larson BL, Luly KM, Kim JD, Langer R. Non-cell-adhesive substrates for printing of arrayed biomaterials. Adv Healthc Mater 2015; 4:501-5. [PMID: 25430948 PMCID: PMC4447497 DOI: 10.1002/adhm.201400594] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Revised: 11/04/2014] [Indexed: 01/07/2023]
Abstract
Cellular microarrays have become extremely useful in expediting the investigation of large libraries of (bio)materials for both in vitro and in vivo biomedical applications. An exceedingly simple strategy is developed for the fabrication of non-cell-adhesive substrates supporting the immobilization of diverse (bio)material features, including both monomeric and polymeric adhesion molecules (e.g., RGD and polylysine), hydrogels, and polymers.
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Affiliation(s)
- Eric A. Appel
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Benjamin L. Larson
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Kathryn M. Luly
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Jinseong D. Kim
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Robert Langer
- David H. Koch Institute for Integrative Cancer Research, Department of Chemical Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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65
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Fisher LE, Hook AL, Ashraf W, Yousef A, Barrett DA, Scurr DJ, Chen X, Smith EF, Fay M, Parmenter CDJ, Parkinson R, Bayston R. Biomaterial modification of urinary catheters with antimicrobials to give long-term broadspectrum antibiofilm activity. J Control Release 2015; 202:57-64. [PMID: 25639970 DOI: 10.1016/j.jconrel.2015.01.037] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2014] [Revised: 01/26/2015] [Accepted: 01/28/2015] [Indexed: 10/24/2022]
Abstract
Catheter-associated urinary tract infection (CAUTI) is the commonest hospital-acquired infection, accounting for over 100,000 hospital admissions within the USA annually. Biomaterials and processes intended to reduce the risk of bacterial colonization of the catheters for long-term users have not been successful, mainly because of the need for long duration of activity in flow conditions. Here we report the results of impregnation of urinary catheters with a combination of rifampicin, sparfloxacin and triclosan. In flow experiments, the antimicrobial catheters were able to prevent colonization by common uropathogens Proteus mirabilis, Staphylococcus aureus and Escherichia coli for 7 to 12weeks in vitro compared with 1-3days for other, commercially available antimicrobial catheters currently used clinically. Resistance development was minimized by careful choice of antimicrobial combinations. Drug release profiles and distribution in the polymer, and surface analysis were also carried out and the process had no deleterious effect on the mechanical performance of the catheter or its balloon. The antimicrobial catheter therefore offers for the first time a means of reducing infection and its complications in long-term urinary catheter users.
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Affiliation(s)
- Leanne E Fisher
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - Andrew L Hook
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Waheed Ashraf
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - Anfal Yousef
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
| | - David A Barrett
- Centre for Analytical Bioscience, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - David J Scurr
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Xinyong Chen
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Emily F Smith
- Nottingham Nanotechnology & Nanoscience Centre, University of Nottingham, Nottingham NG7 2RD, UK.
| | - Michael Fay
- Nottingham Nanotechnology & Nanoscience Centre, University of Nottingham, Nottingham NG7 2RD, UK.
| | | | - Richard Parkinson
- Nottingham Urology Centre, Nottingham University Hospitals NHS Trust, Nottingham NG5 1PB, UK.
| | - Roger Bayston
- Biomaterials-Related Infection Group, School of Medicine, Nottingham University Hospitals, Queen's Medical Centre, Nottingham NG7 2UH, UK.
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High throughput screening for biomaterials discovery. J Control Release 2014; 190:115-26. [DOI: 10.1016/j.jconrel.2014.06.045] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 06/23/2014] [Accepted: 06/23/2014] [Indexed: 01/29/2023]
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Smith AAA, Wohl BM, Kryger MBL, Hedemann N, Guerrero-Sanchez C, Postma A, Zelikin AN. Macromolecular prodrugs of ribavirin: concerted efforts of the carrier and the drug. Adv Healthc Mater 2014; 3:1404-7. [PMID: 24408515 DOI: 10.1002/adhm.201300637] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 11/25/2013] [Indexed: 12/20/2022]
Abstract
Polymers in tune. Automated parallel polymer synthesis is developed to obtain libraries of macromolecular prodrugs of ribavirin, a broad-spectrum antiviral agent. As many as 10 identified lead polymer conjugates exhibit therapeutic efficacy matching that of the pristine drug and at the same time suppressed the origin of the main side effect of ribavirin.
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Affiliation(s)
- Anton A. A. Smith
- Department Department of Chemistry; Aarhus University; Aarhus C 8000 Denmark
| | - Benjamin M. Wohl
- Department Department of Chemistry; Aarhus University; Aarhus C 8000 Denmark
- iNano Interdisciplinary Nanoscience Centre; Aarhus University; Aarhus C 8000 Denmark
| | - Mille B. L. Kryger
- Department Department of Chemistry; Aarhus University; Aarhus C 8000 Denmark
- iNano Interdisciplinary Nanoscience Centre; Aarhus University; Aarhus C 8000 Denmark
| | - Natasha Hedemann
- Department Department of Chemistry; Aarhus University; Aarhus C 8000 Denmark
| | - Carlos Guerrero-Sanchez
- CSIRO - Materials Science and Engineering, Ian Wark Laboratory; Bayview Ave Clayton Victoria 3168 Australia
| | - Almar Postma
- CSIRO - Materials Science and Engineering, Ian Wark Laboratory; Bayview Ave Clayton Victoria 3168 Australia
| | - Alexander N. Zelikin
- Department Department of Chemistry; Aarhus University; Aarhus C 8000 Denmark
- iNano Interdisciplinary Nanoscience Centre; Aarhus University; Aarhus C 8000 Denmark
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68
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Hook AL, Chang CY, Scurr DJ, Langer R, Anderson DG, Williams P, Davies MC, Alexander MR. Thermally switchable polymers achieve controlled Escherichia coli detachment. Adv Healthc Mater 2014; 3:1020-5. [PMID: 24497458 DOI: 10.1002/adhm.201300518] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 12/06/2013] [Indexed: 01/11/2023]
Abstract
The thermally triggered release of up to 96% of attached uropathogenic E. coli is achieved on two polymers with opposite changes in surface wettability upon reduction in temperature. This demonstrates that the bacterial attachment to a surface cannot be explained in terms of water contact angle alone; rather, the surface composition of the polymer plays the key role.
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Affiliation(s)
- Andrew L. Hook
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy; University of Nottingham; Nottingham NG72RD UK
| | - Chien-Yi Chang
- School of Life Sciences; University of Nottingham; Nottingham NG72RD UK
| | - David J. Scurr
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy; University of Nottingham; Nottingham NG72RD UK
| | - Robert Langer
- Department of Chemical Engineering; Harvard-MIT Division of Health Sciences and Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Daniel G. Anderson
- Department of Chemical Engineering; Harvard-MIT Division of Health Sciences and Technology; 77 Massachusetts Avenue Cambridge MA 02139 USA
- Institute for Integrative Cancer Research; Massachusetts Institute of Technology; 500 Main Street Cambridge MA 02139 USA
| | - Paul Williams
- School of Life Sciences; University of Nottingham; Nottingham NG72RD UK
| | - Martyn C. Davies
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy; University of Nottingham; Nottingham NG72RD UK
| | - Morgan R. Alexander
- Laboratory of Biophysics and Surface Analysis, School of Pharmacy; University of Nottingham; Nottingham NG72RD UK
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69
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Celiz AD, Smith JGW, Patel AK, Langer R, Anderson DG, Barrett DA, Young LE, Davies MC, Denning C, Alexander MR. Chemically diverse polymer microarrays and high throughput surface characterisation: a method for discovery of materials for stem cell culture†Electronic supplementary information (ESI) available. See DOI: 10.1039/c4bm00054dClick here for additional data file. Biomater Sci 2014; 2:1604-1611. [PMID: 25328672 PMCID: PMC4183437 DOI: 10.1039/c4bm00054d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2014] [Accepted: 04/22/2014] [Indexed: 01/03/2023]
Abstract
Chemically diverse polymer microarrays as a powerful screening tool for the discovery of new materials for a variety of applications.
Materials discovery provides the opportunity to identify novel materials that are tailored to complex biological environments by using combinatorial mixing of monomers to form large libraries of polymers as micro arrays. The materials discovery approach is predicated on the use of the largest chemical diversity possible, yet previous studies into human pluripotent stem cell (hPSC) response to polymer microarrays have been limited to 20 or so different monomer identities in each study. Here we show that it is possible to print and assess cell adhesion of 141 different monomers in a microarray format. This provides access to the largest chemical space to date, allowing us to meet the regenerative medicine challenge to provide scalable synthetic culture ware. This study identifies new materials suitable for hPSC expansion that could not have been predicted from previous knowledge of cell-material interactions.
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Affiliation(s)
- A D Celiz
- Laboratory of Biophysics and Surface Analysis , School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK .
| | - J G W Smith
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - A K Patel
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - R Langer
- Department of Chemical Engineering , Harvard-MIT Division of Health Sciences and Technology , David H. Koch Institute for Integrative Cancer Research , Massachusetts Institute of Technology , 500 Main Street , Cambridge , MA 02139 , USA
| | - D G Anderson
- Department of Chemical Engineering , Harvard-MIT Division of Health Sciences and Technology , David H. Koch Institute for Integrative Cancer Research , Massachusetts Institute of Technology , 500 Main Street , Cambridge , MA 02139 , USA
| | - D A Barrett
- School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK
| | - L E Young
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - M C Davies
- Laboratory of Biophysics and Surface Analysis , School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK .
| | - C Denning
- Wolfson Centre for Stem Cells , Tissue Engineering and Modelling Centre for Biomolecular Sciences , University of Nottingham , Nottingham , NG7 2RD , UK
| | - M R Alexander
- Laboratory of Biophysics and Surface Analysis , School of Pharmacy , University of Nottingham , Nottingham , NG7 2RD , UK .
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70
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Robert-Nicoud G, Donno R, Cadman CJ, Alexander MR, Tirelli N. Surface modification of silicone via colloidal deposition of amphiphilic block copolymers. Polym Chem 2014. [DOI: 10.1039/c4py00941j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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