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Related Concept Videos

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Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...
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Immunocytochemistry and Immunohistochemistry01:22

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High-Throughput Automated Multiplex Immunofluorescence Assays for Translational Research
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Immunohistochemistry Microarrays.

Huiyan Li1, Gabrielle Brewer1, Grant Ongo1

  • 1Biomedical Engineering Department, ‡McGill University and Genome Quebec Innovation Centre, §Department of Pathology, McGill University Health Centre, and ∥Department of Neurology and Neurosurgery, McGill University , Montreal, Quebec H3A0G1, Canada.

Analytical Chemistry
|August 2, 2017
PubMed
Summary
This summary is machine-generated.

We developed IHC microarrays (IHCμA) for multiplexed staining of intact tissues, enabling simultaneous analysis of multiple proteins. This technique preserves tissue architecture and spatial information, advancing biomarker discovery in cancer research.

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Area of Science:

  • Biomedical Engineering
  • Molecular Pathology
  • Cancer Research

Background:

  • Conventional immunohistochemistry (IHC) is crucial for cancer diagnosis but limited to single-protein analysis per tissue section.
  • Existing high-throughput methods like tissue microarrays and microfluidics have limitations in multiplexing, complexity, or analyzing intact tissues.
  • There is a need for methods that allow multiplexed protein analysis on intact tissues while preserving histological and spatial context.

Purpose of the Study:

  • To introduce and validate IHC microarrays (IHCμA) as a novel method for multiplexed protein staining on intact tissue sections.
  • To demonstrate the ability of IHCμA to preserve histological and spatial information during multiplexed staining.
  • To evaluate the potential of IHCμA for high-throughput biomarker discovery and validation in cancer.

Main Methods:

  • Development of IHC microarrays (IHCμA) by prespotting antibody-containing dextran solution droplets onto slides.
  • Application of IHCμA to formalin-fixed, paraffin-embedded (FFPE) tissue sections by snapping prespotted slides onto tissue slices.
  • Evaluation of sampling considerations and demonstration of multiplexed staining of 8 cancer proteins using 180 spots on a breast cancer tissue section.

Main Results:

  • IHCμA enables multiplexed staining of intact tissues with preserved histological and spatial information, similar to conventional IHC.
  • The method allows prespotting and storage of antibody microarrays, reducing the need for complex instrumentation and immediate preparation.
  • Demonstrated successful multiplexed staining of 8 cancer proteins on a breast cancer tissue, showcasing the technique's potential.

Conclusions:

  • IHC microarrays (IHCμA) offer a powerful new approach for multiplexed immunohistochemistry on intact tissue slices.
  • This technique overcomes limitations of current methods, facilitating simultaneous analysis of multiple proteins with preserved spatial context.
  • IHCμA holds significant potential for accelerating the discovery and validation of tissue biomarkers in human tumors.