Reduction of microbial adhesion on polyurethane by a sub-nanometer covalently-attached surface modifier. 2021

Brian De La Franier, and Dalal Asker, and Desmond van den Berg, and Benjamin Hatton, and Michael Thompson
Department of Chemistry, University of Toronto, 80 St. George Street, Toronto, Ontario, M5S 3H6, Canada.

Indwelling urinary catheters are a common medical device used to relieve urinary retention. Many patients who undergo urinary catheterization develop urinary tract infections (UTIs), which can lead to severe medical complications and high cost of subsequent treatment. Recent years have seen a number of attempts at reducing the rate of UTIs in catheterized patients via catheter surface modifications. In this work, a low cost, robust anti-thrombogenic, and sterilizable anti-fouling layer based on a covalently-bound monoethylene glycol hydroxide (MEG-OH) was attached to polyurethane, a polymeric material commonly used to fabricate catheters. Modified polyurethane tubing was compared to bare tubing after exposure to a wide spectrum of pathogens including Gram-negative bacteria (Pesudomonas aeruginosa, Escherichia coli), Gram-positive bacteria (Staphylococcus aureus) and a fungus (Candida albicans). It has been demonstrated that the MEG-OH monolayer was able to significantly reduce the amount of adhesion of pathogens present on the material surface, with between 85 and 96 % reduction after 24 h of exposure. Additionally, similar reductions in surface fouling were observed following autoclave sterilization, long term storage of samples in air, and longer exposure up to 3 days.

UI MeSH Term Description Entries
D011140 Polyurethanes A group of thermoplastic or thermosetting polymers containing polyisocyanate. They are used as ELASTOMERS, as coatings, as fibers and as foams. Polyisocyanates,Ostamer,Pellethane,Spandex,Ostamers,Pellethanes,Polyisocyanate,Polyurethane,Spandices
D002408 Catheters, Indwelling Catheters designed to be left within an organ or passage for an extended period of time. Implantable Catheters,In-Dwelling Catheters,Catheter, In-Dwelling,Catheter, Indwelling,Catheters, In-Dwelling,In Dwelling Catheters,In-Dwelling Catheter,Indwelling Catheter,Indwelling Catheters
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000900 Anti-Bacterial Agents Substances that inhibit the growth or reproduction of BACTERIA. Anti-Bacterial Agent,Anti-Bacterial Compound,Anti-Mycobacterial Agent,Antibacterial Agent,Antibiotics,Antimycobacterial Agent,Bacteriocidal Agent,Bacteriocide,Anti-Bacterial Compounds,Anti-Mycobacterial Agents,Antibacterial Agents,Antibiotic,Antimycobacterial Agents,Bacteriocidal Agents,Bacteriocides,Agent, Anti-Bacterial,Agent, Anti-Mycobacterial,Agent, Antibacterial,Agent, Antimycobacterial,Agent, Bacteriocidal,Agents, Anti-Bacterial,Agents, Anti-Mycobacterial,Agents, Antibacterial,Agents, Antimycobacterial,Agents, Bacteriocidal,Anti Bacterial Agent,Anti Bacterial Agents,Anti Bacterial Compound,Anti Bacterial Compounds,Anti Mycobacterial Agent,Anti Mycobacterial Agents,Compound, Anti-Bacterial,Compounds, Anti-Bacterial
D014546 Urinary Catheterization Passage of a CATHETER into the URINARY BLADDER or kidney. Catheterization, Ureteral,Catheterization, Urethral,Catheterization, Urinary,Foley Catheterization,Ureteral Catheterization,Urethral Catheterization,Catheterization, Foley,Catheterizations, Ureteral,Catheterizations, Urethral,Catheterizations, Urinary,Ureteral Catheterizations,Urethral Catheterizations,Urinary Catheterizations
D014552 Urinary Tract Infections Inflammatory responses of the epithelium of the URINARY TRACT to microbial invasions. They are often bacterial infections with associated BACTERIURIA and PYURIA. Infection, Urinary Tract,Infections, Urinary Tract,Tract Infection, Urinary,Tract Infections, Urinary,Urinary Tract Infection
D062885 Urinary Catheters Catheters inserted into the URINARY BLADDER or kidney for therapeutic or diagnostic purposes. Ureteral Catheters,Urethral Catheters,Catheter, Ureteral,Catheter, Urethral,Catheter, Urinary,Catheters, Ureteral,Catheters, Urethral,Catheters, Urinary,Ureteral Catheter,Urethral Catheter,Urinary Catheter

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