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      Engineering serendipity: High-throughput discovery of materials that resist bacterial attachment

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          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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          Most cited references57

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          The control of human mesenchymal cell differentiation using nanoscale symmetry and disorder.

          A key tenet of bone tissue engineering is the development of scaffold materials that can stimulate stem cell differentiation in the absence of chemical treatment to become osteoblasts without compromising material properties. At present, conventional implant materials fail owing to encapsulation by soft tissue, rather than direct bone bonding. Here, we demonstrate the use of nanoscale disorder to stimulate human mesenchymal stem cells (MSCs) to produce bone mineral in vitro, in the absence of osteogenic supplements. This approach has similar efficiency to that of cells cultured with osteogenic media. In addition, the current studies show that topographically treated MSCs have a distinct differentiation profile compared with those treated with osteogenic media, which has implications for cell therapies.
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            Biofilms and device-associated infections.

            Microorganisms commonly attach to living and nonliving surfaces, including those of indwelling medical devices, and form biofilms made up of extracellular polymers. In this state, microorganisms are highly resistant to antimicrobial treatment and are tenaciously bound to the surface. To better understand and control biofilms on indwelling medical devices, researchers should develop reliable sampling and measurement techniques, investigate the role of biofilms in antimicrobial drug resistance, and establish the link between biofilm contamination and patient infection.
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              Mechanisms of biofilm resistance to antimicrobial agents.

              Biofilms are communities of microorganisms attached to a surface. It has become clear that biofilm-grown cells express properties distinct from planktonic cells, one of which is an increased resistance to antimicrobial agents. Recent work has indicated that slow growth and/or induction of an rpoS-mediated stress response could contribute to biocide resistance. The physical and/or chemical structure of exopolysaccharides or other aspects of biofilm architecture could also confer resistance by exclusion of biocides from the bacterial community. Finally, biofilm-grown bacteria might develop a biofilm-specific biocide-resistant phenotype. Owing to the heterogeneous nature of the biofilm, it is likely that there are multiple resistance mechanisms at work within a single community. Recent research has begun to shed light on how and why surface-attached microbial communities develop resistance to antimicrobial agents.
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                Author and article information

                Contributors
                Journal
                Acta Biomater
                Acta Biomater
                Acta Biomaterialia
                Elsevier
                1742-7061
                1878-7568
                01 April 2016
                01 April 2016
                : 34
                : 84-92
                Affiliations
                [a ]Laboratory of Biophysics and Surface Analysis, School of Pharmacy, University of Nottingham, Nottingham, UK
                [b ]Drug Delivery and Tissue Engineering, School of Pharmacy, University of Nottingham, Nottingham, UK
                [c ]School of Molecular Medical Sciences, University of Nottingham, Nottingham, UK
                Author notes
                [* ]Corresponding author at: Room C07 Boots Science Building, University Park, Nottingham NG7 2RD, UK.Room C07 Boots Science BuildingUniversity ParkNottinghamNG7 2RDUK morgan.alexander@ 123456nottingham.ac.uk
                Article
                S1742-7061(15)30185-9
                10.1016/j.actbio.2015.11.008
                4824014
                26577984
                b3927d3c-2dbb-4087-a633-aeffc4793ef3
                © 2015 Elsevier Ltd. All rights reserved.

                This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

                History
                : 13 September 2015
                : 23 October 2015
                : 6 November 2015
                Categories
                Review Article

                Biomaterials & Organic materials
                biomaterials,bacteria,high-throughput,biofilm,polymers
                Biomaterials & Organic materials
                biomaterials, bacteria, high-throughput, biofilm, polymers

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