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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...

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Electronic Tongue Generating Continuous Recognition Patterns for Protein Analysis
08:46

Electronic Tongue Generating Continuous Recognition Patterns for Protein Analysis

Published on: September 16, 2014

Handheld impedance biosensor system using engineered proteinaceous receptors.

Ebrahim Ghafar-Zadeh1, Shafinaz F Chowdhury, Amir Aliakbar

  • 1Department of Electrical and Computer Engineering, McGill University, Montreal, Canada. ebrahim.ghafar-zadeh@polymtl.ca

Biomedical Microdevices
|July 24, 2010
PubMed
Summary
This summary is machine-generated.

This study presents a novel impedometric biosensor for rapid glucose detection. The device uses engineered proteins for high sensitivity, enabling point-of-care diagnostics.

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Area of Science:

  • Biomedical Engineering
  • Biosensor Technology
  • Point-of-Care Diagnostics

Background:

  • Impedometric biosensors offer label-free detection of biological analytes.
  • Point-of-care diagnostics require rapid, sensitive, and portable sensing platforms.
  • Protein-based biosensors leverage specific biomolecular interactions for analyte recognition.

Purpose of the Study:

  • To develop and validate an impedometric protein-based biosensor for glucose monitoring.
  • To assess the feasibility of a hand-held impedance reader for point-of-care applications.
  • To evaluate the performance of genetically engineered glucokinase as a receptor protein for glucose sensing.

Main Methods:

  • Fabrication of microelectrodes for impedance measurements.
  • Immobilization of genetically engineered glucokinase onto the electrode surface.
  • Utilizing a hand-held impedance reader to detect binding events with glucose analytes.
  • Reagent-less impedometric detection of glucose concentration.

Main Results:

  • The biosensor demonstrated high sensitivity for glucose detection.
  • Achieved a limit of detection of 0.5 mM glucose.
  • Operated within the physiologically relevant glucose range of 0.5 mM to 7.5 mM.
  • Exhibited a rapid response time of less than 10 seconds.

Conclusions:

  • The developed impedometric protein-based biosensor is suitable for point-of-care glucose diagnostics.
  • The system provides sensitive and rapid glucose measurements.
  • Genetically engineered glucokinase is a viable receptor for impedometric glucose biosensing.