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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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Non-invasive biological matrices on biosensor design.

Ghada Al-Assi1, Waleed K Abdulsahib2, Sanan Thaer Abdal-Wahab3

  • 1Faculty of Allied Medical Sciences, Hourani Center for Applied Scientific Research, Al-Ahliyya Amman University, Amman, Jordan.

Clinica Chimica Acta; International Journal of Clinical Chemistry
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Summary

This review analyzes biological sample matrices for point-of-care (POC) biosensors. Non-invasive options like sweat and saliva show promise for developing high-quality, low-cost POC devices.

Keywords:
Biological matricesBiosensorsNon-invasive monitoringPoint-of-care

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Biosensor Technology

Background:

  • Point-of-care (POC) device performance hinges on sample matrix selection.
  • Traditional invasive samples (e.g., blood) offer rich data but limit continuous monitoring.
  • Non-invasive and minimally invasive matrices are gaining traction for POC biosensor development.

Purpose of the Study:

  • To comprehensively review biological matrices for POC biosensor development.
  • To evaluate the advantages, limitations, and potential of various sample sources.
  • To assess recent advancements and future directions in POC biosensor technology.

Main Methods:

  • Literature review of biological matrices used in POC biosensor development.
  • Analysis of optical and electrochemical detection methods for POC samples.
  • Evaluation of POC device progress, including paper-based sensors, flexible devices, and microfluidic chips.

Main Results:

  • Non-invasive matrices (sweat, saliva, tears, urine, nasal secretions) offer alternatives to blood.
  • Each matrix has unique biomarkers and challenges in collection, stability, and concentration.
  • Recent POC development shows a trend towards high-quality, low-cost biosensors.

Conclusions:

  • Optimizing non-invasive sample matrices is crucial for advancing POC biosensors.
  • Technological and economic requirements for POC development are significant.
  • Future work should focus on improving POC device features and addressing current limitations.