Catalytic Biosensors Operating under Quasi-Equilibrium Conditions for Mitigating the Changes in Substrate Diffusion.

Abstract

Despite the success of continuous glucose measuring systems operating through the skin for about 14 days, long-term implantable biosensors are facing challenges caused by the foreign-body reaction. We present a conceptually new strategy using catalytic enzyme-based biosensors based on a measuring sequence leading to minimum disturbance of the substrate equilibrium concentration by controlling the sensor between "on" and "off" state combined with short potentiometric data acquisition. It is required that the enzyme activity can be completely switched off and no parasitic side reactions allow substrate turnover. This is achieved by using an O2 -independent FAD-dependent glucose dehydrogenase embedded within a crosslinked redox polymer. A short measuring interval allows the glucose concentration equilibrium to be restored quickly which enables the biosensor to operate under quasi-equilibrium conditions.

• Authors: Anna Muhs, Tim Bobrowski, Anna Lielpētere, Wolfgang Schuhmann
• Journal: Angewandte Chemie (International ed. in English) (Angew Chem Int Ed Engl) Vol. 61 Issue 52 Pg. e202211559 (12 23 2022) ISSN: 1521-3773 [Electronic] Germany
• PMID: 36253337 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.

Chemical References

• Glucose 1-Dehydrogenase
• Glucose

Topics

• Biosensing Techniques
• Glucose 1-Dehydrogenase
• Glucose
• Catalysis
• Diffusion