Plasma-Mediated Grafting of Poly(ethylene glycol) on Polyamide and Polyester Surfaces and Evaluation of Antifouling Ability of Modified Substrates

Dong, Baiyan; Jiang, Hongjie; Manolache, S.; Wong, and Amy C. Lee; Dénès, F.

doi:10.1021/la0633280

Cited by 84 publications

(62 citation statements)

References 41 publications

(50 reference statements)

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“…The results show approximately 60% reduction in the number of attached Listeria cells from both strains relative to the numbers that can adhere and grow on the unmodified surface; this can most probably be attributed to the brush-like structure of the modification layer. Possibly the effect is similar to what has been demonstrated in other studies [11][12][13], where the brush-like structure of the modifying layer on different surfaces, such as stainless steel, glass, polyamide and polyester, also reduced bacterial adhesion. The effectiveness of these structures against bacterial attachment is caused by steric hindrance that keeps the bacterial cells at a distance from the surface, which results in weakening of the (e.g., van der Waals) interactions [13].…”

Section: Bacterial Adhesionsupporting

confidence: 85%

Enzymatic Modification of Polyethersulfone Membranes

Nady¹,

Charles

Franssen

et al. 2012

Water

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Enzymatic modification of polyethersulfone (PES) membranes has been found not only feasible, but also an environmentally attractive way to vary surface properties systematically. In this paper, we summarize the effect of modification layers on protein adsorption and bacterial adhesion on PES membranes and surfaces. The enzyme laccase was used to covalently bind (poly)phenolic acids to the membrane, and compared to other membrane modification methods, this method is very mild and did not influence the mechanical strength negatively. Depending on the conditions used during modification, the modification layers were capable of influencing interactions with typical fouling species, such as protein, and to influence attachment of microorganisms. We also show that the modification method can be successfully applied to hollow fiber membranes; and depending on the pore size of the base membrane, proteins were partially rejected by the membrane. In conclusion, we have shown that enzymatic membrane modification is a versatile and economically attractive method that can be used to influence various interactions that normally lead to surface contamination, pore blocking, and considerable flux loss in membranes. OPEN ACCESSWater 2012, 4 933

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Section: Bacterial Adhesionsupporting

confidence: 85%

Enzymatic Modification of Polyethersulfone Membranes

Nady¹,

Charles

Franssen

et al. 2012

Water

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“…3). Importantly, for the development of biofilms in the presence of weak adhesion forces, biofilms even form on highly hydrated, polymer brush coatings, which exert very small adhesion forces in the subnanonewton range that were found to be insufficient for adhering bacteria to even realize that they were in an adhering state (35).…”

Section: Discussionmentioning

confidence: 99%

Influence of Adhesion Force on icaA and cidA Gene Expression and Production of Matrix Components in Staphylococcus aureus Biofilms

Harapanahalli

Chen

et al. 2015

Appl Environ Microbiol

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The majority of human infections are caused by biofilms. The biofilm mode of growth enhances the pathogenicity of Staphylococcus spp. considerably, because once they adhere, staphylococci embed themselves in a protective, self-produced matrix of extracellular polymeric substances (EPSs). The aim of this study was to investigate the influence of forces of staphylococcal adhesion to different biomaterials on icaA (which regulates the production of EPS matrix components) and cidA (which is associated with cell lysis and extracellular DNA [eDNA] release) gene expression in Staphylococcus aureus biofilms. Experiments were performed with S. aureus ATCC 12600 and its isogenic mutant, S. aureus ATCC 12600 ⌬pbp4, deficient in peptidoglycan cross-linking. Deletion of pbp4 was associated with greater cell wall deformability, while it did not affect the planktonic growth rate, biofilm formation, cell surface hydrophobicity, or zeta potential of the strains. The adhesion forces of S. aureus ATCC 12600 were the strongest on polyethylene (4.9 ؎ 0.5 nN), intermediate on polymethylmethacrylate (3.1 ؎ 0.7 nN), and the weakest on stainless steel (1.3 ؎ 0.2 nN). The production of poly-N-acetylglucosamine, eDNA presence, and expression of icaA genes decreased with increasing adhesion forces. However, no relation between adhesion forces and cidA expression was observed. The adhesion forces of the isogenic mutant S. aureus ATCC 12600 ⌬pbp4 (deficient in peptidoglycan cross-linking) were much weaker than those of the parent strain and did not show any correlation with the production of poly-N-acetylglucosamine, eDNA presence, or expression of the icaA and cidA genes. This suggests that adhesion forces modulate the production of the matrix molecule poly-N-acetylglucosamine, eDNA presence, and icaA gene expression by inducing nanoscale cell wall deformation, with cross-linked peptidoglycan layers playing a pivotal role in this adhesion force sensing. Staphylococcus spp. present an important group of potentially pathogenic strains and species. According to estimates by the National Institutes of Health, about 80% of all human infections are caused by biofilms (1). The biofilm mode of growth considerably enhances the pathogenicity of Staphylococcus spp. when the biofilm is formed on the surfaces of biomaterial implants and devices, such as total knee or hip arthroplasties or pacemakers (2). Biofilm formation starts with the adhesion of individual organisms to a substratum surface. Initially, adhesion is reversible, but the bond between an adhering organism and a substratum surface rapidly matures over time to become stronger, and eventually, adhesion is irreversible (3). Adhesion is further enforced through the production of a matrix consisting of extracellular polymeric substances (EPSs) by the adhering organisms, in which they grow and find shelter against the host immune system and antibiotic treatment. The EPS composition largely depends on the bacterial strains and environmental conditions, but major components of EPSs across differen...

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“…Successful routes were physical adsorption, spontaneous assembly of monolayers, electrografting, or photografting onto the surface. [4 -7] Dong et al [8] reported that PEG molecules were successfully grafted onto SiCl 4 -plasmafunctionalized polyamide (PA) and polyethylene terphtalate (PET) surfaces in a PEG degassed liquid phase during 20 h. The surface coverage of PEG was controlled by changing the chain length or the grafting reaction time. Both modified substrates significantly inhibited biofilm formation by Listeria monocytogenes.…”

Section: Introductionmentioning

confidence: 99%