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Compartmentalized Linker Array: A Scalable and Transferrable Microarray Format for Multiplexed Immunoassays.

Roshan Aggarwal1, Bryn Ferris1, Huiyan Li1

  • 1School of Engineering, University of Guelph, Guelph, Ontario N1G2W1, Canada.

Analytical Chemistry
|June 2, 2023
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Summary
This summary is machine-generated.

A new compartmentalized linker array (CLA) simplifies microarray fabrication for multiplexed bioassays. This method avoids complex equipment and preserves bioreagent activity, enabling sensitive detection of cancer biomarkers.

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Area of Science:

  • Biotechnology
  • Assay Development
  • Biomarker Detection

Background:

  • Conventional microarrays require complex spotters for nanoliter bioreagent delivery, risking bioactivity loss.
  • Multiplexed assays face challenges with cross-reactions, impacting reproducibility and scalability.
  • Existing methods lack simplicity and storage stability for widespread microarray use.

Purpose of the Study:

  • Introduce a novel microarray format, the compartmentalized linker array (CLA), for simplified bioreagent patterning.
  • Demonstrate CLA's utility in multiplexed immunoassays for sensitive biomarker detection.
  • Evaluate CLA's storage stability and potential for broader applications in biological research.

Main Methods:

  • Developed CLA using pre-prepared chemical linkers in microliter compartments on a glass slide.
  • Utilized a "two-phase" blocking system to minimize background noise.
  • Applied CLA for multiplexed sandwich immunoassay of three cancer-related proteins.

Main Results:

  • Achieved low pg/mL sensitivity for three cancer biomarkers, comparable to conventional assays.
  • Demonstrated long-term storage capability of the CLA chip.
  • Successfully minimized cross-reactions and false positives through compartmentalization.

Conclusions:

  • CLA offers a simplified, scalable, and reproducible microarray technology for bioreagent patterning.
  • The developed CLA format enhances assay sensitivity and stability, suitable for biomarker research.
  • CLA technology holds potential for diverse biological and biomedical applications beyond protein assays.