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Related Experiment Video

Updated: Oct 28, 2025

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Biomarker barcodes: multiplexed microfluidic immunohistochemistry enables high-throughput analysis of tissue

Chang Hyun Cho1, Minkyung Cho1, Je-Kyun Park1,2

  • 1Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea. jekyun@kaist.ac.kr.

Lab on a Chip
|July 15, 2021
PubMed
Summary

We developed a novel microfluidic immunohistochemistry (IHC) technique for high-throughput biomarker analysis. This "barcode-IHC" method uses biomarker patterns on tissue microarrays (TMAs) for efficient molecular diagnostics.

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Area of Science:

  • Biomedical Engineering
  • Molecular Pathology
  • Cancer Diagnostics

Background:

  • Immunohistochemistry (IHC) is crucial for cancer diagnosis.
  • Current IHC methods can be time-consuming and limited in multiplexing.
  • Tissue microarrays (TMAs) allow for parallel analysis but require efficient staining.

Purpose of the Study:

  • To develop a high-throughput multiplexed microfluidic IHC technology.
  • To enable biomarker barcoding on TMAs for rapid molecular profiling.
  • To validate the efficiency and accuracy of the new technique for breast cancer diagnosis.

Main Methods:

  • A multichannel poly(dimethylsiloxane) microfluidic device was designed for multiplexed IHC.
  • Independent antibody injection into microfluidic channels allowed simultaneous staining of multiple biomarkers on TMA cores.
  • Biomarker expression patterns were analyzed using a slide scanner to create "biomarker barcodes".

Main Results:

  • Multiplexed IHC was successfully performed on TMAs and cell microarrays (CMAs).
  • Consistent staining quality was achieved irrespective of channel order or core position.
  • Distinctive "biomarker barcodes" were generated for different breast cancer cell lines and patient samples.
  • Barcode-IHC showed high reproducibility and comparable diagnostic capability to conventional methods.

Conclusions:

  • The developed microfluidic IHC technology enables high-throughput analysis of TMAs.
  • Biomarker barcoding offers a novel approach for molecular diagnostics in cancer.
  • This technique has the potential for rapid screening and improved diagnostic capabilities.