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Related Concept Videos

Microbial Biosensors01:17

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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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A multiplexed immunoaggregation biomarker assay using a two-stage micro resistive pulse sensor.

Y Han1, H Wu2, F Liu1

  • 1Department of Mechanical Engineering, University of Akron , Akron, Ohio 44325, USA.

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This study introduces an immunoaggregation assay chip for simultaneous detection of multiple biomarkers. The novel chip utilizes antibody-functionalized microparticles and a micro resistive pulse sensor for sensitive and rapid biomarker quantification without labeling.

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Biosensing Technology

Background:

  • Multiplexed biomarker detection is crucial for accurate disease diagnosis and monitoring.
  • Current methods often require complex labeling processes and lack simultaneous multi-analyte capabilities.
  • Development of rapid, sensitive, and label-free bioassay platforms is highly desirable.

Purpose of the Study:

  • To develop and validate an immunoaggregation assay chip for multiplexed biomarker detection.
  • To quantify multiple biomarkers simultaneously in a single assay using antibody-functionalized microparticles.
  • To demonstrate a label-free, rapid, and quantitative detection method for biomedical research and clinical applications.

Main Methods:

  • Utilized antibody-functionalized microparticles (Ab-MPs) with distinct sizes and magnetic properties for specific biomarker capture.
  • Employed immunoaggregation of Ab-MPs upon interaction with target biomarkers.
  • Implemented a two-stage micro resistive pulse sensor to differentiate and count Ab-MP aggregates based on size and magnetic properties.

Main Results:

  • Successfully demonstrated multiplexed detection of human ferritin and mouse anti-rabbit IgG in fetal bovine serum.
  • Established a correlation between the volume fraction of Ab-MP aggregates and biomarker concentration.
  • Achieved detection ranges of 5.2–208 ng/ml for human ferritin and 3.1–5.12 × 10^4 ng/ml for mouse anti-rabbit IgG.

Conclusions:

  • The developed immunoaggregation assay chip enables quantitative, simultaneous detection of multiple biomarkers.
  • The label-free approach simplifies the assay process and enhances its applicability.
  • This technology holds significant promise for rapid biomarker analysis in clinical diagnostics and biomedical research.