Development of smart sensing film with nonbiofouling properties for potentiometric detection of local pH changes caused by bacterial and yeast infections around orthopedic implants

0568558 - ÚMCH 2024 RIV DE eng J - Journal Article
Tomšík, Elena - Gunár, Kristýna - Krunclová, Tereza - Ivanko, Iryna - Trousil, Jiří - Fojt, J. - Hybášek, V. - Daniel, M. - Sepitka, J. - Judl, T. - Jahoda, D. - Hrubý, Martin
Development of smart sensing film with nonbiofouling properties for potentiometric detection of local pH changes caused by bacterial and yeast infections around orthopedic implants.
Advanced Materials Interfaces. Roč. 10, č. 5 (2023), č. článku 2201878. ISSN 2196-7350. E-ISSN 2196-7350
R&D Projects: GA MZd(CZ) NU20-06-00424; GA ČR(CZ) GA21-01090S
Institutional support: RVO:61389013
Keywords : bacteria * mechanical properties * nonbiofouling
OECD category: Analytical chemistry
Impact factor: 5.4, year: 2022
Method of publishing: Open access
https://onlinelibrary.wiley.com/doi/10.1002/admi.202201878

The local peri-implant pH changes caused by sterile inflammation and bacterial and fungal infections are studied herein. Then, a sensing electrode based on polyaniline and poly(2-methyl-2-oxazoline) on a titanium alloy support is developed for potentiometric detection of peri-implant pH changes to enable early detection of the aforementioned pathologies. The infected endoprosthesis area is shown to have an average pH of 0.79 units lower than the aseptic sample. The pH measurements of the individual pathogenic bacteria or pathogenic yeast reveal that Escherichia coli decreased the pH by 1.24 units, Staphylococcus aureus decreased the pH by 1.33 units and the methicillin-resistant Staphylococcus aureus bacteria decreased the pH from 7.2 to 5.6 during 10 h, followed by a subsequent increase to 6.4. The results are statistically significant (α = 0.01). Pseudomonas aeruginosa is not shown to change pH levels. On the other hand, the pathogenic yeast has the lowest recorded pH, which decreases from 5.8 to 4.8. This difference in pH can be used to identify the nature of the infection. The developed electrodes have a pH response between pH 5 and 8, with a Nernstian slope of −59.6/pH. The developed electrode can contribute to the next generation of biosensors.

Permanent Link: https://hdl.handle.net/11104/0342246