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Related Experiment Video

Updated: Dec 11, 2025

Live-3D-Cell Immunocytochemistry Assays of Pediatric Diffuse Midline Glioma
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Four methods to analyze H3K27M mutation in diffuse midline gliomas.

Huanying Zhao1, Xiao Fang2, Bing Xue1

  • 1Genomics Research Platform, Core Facilities Center, Capital Medical University, Beijing, 100069, China.

Pathology, Research and Practice
|August 23, 2020
PubMed
Summary

Detecting the histone H3 K27M mutation in diffuse midline gliomas is crucial. Immunohistochemistry (IHC) and Sanger sequencing offer highly sensitive and specific methods for identifying this key biomarker.

Keywords:
GliomaH3K27MMass arrayPyrosequencingSanger sequencing

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Area of Science:

  • Oncology
  • Molecular Pathology
  • Genetics

Background:

  • The histone H3 K27M mutation is a significant biomarker in diffuse midline gliomas, impacting prognosis and treatment.
  • Various molecular and histological techniques exist for H3K27M detection, but consensus on the optimal method is lacking.

Purpose of the Study:

  • To evaluate and compare the accuracy of pyrosequencing (PSQ), Sanger sequencing, immunohistochemistry (IHC), and Mass array for detecting H3K27M mutations in diffuse midline gliomas.
  • To determine the most reliable and practical method for routine clinical pathology use.

Main Methods:

  • Fifty diffuse midline glioma samples were analyzed in parallel using PSQ, Sanger sequencing, IHC, and Mass array.
  • Pyrosequencing (PSQ) served as the reference standard for calculating sensitivity, specificity, and correlation across methods.

Main Results:

  • H3K27M mutation detection rates were similar across methods: 64% (PSQ), 66% (IHC), 62% (Sanger), and 62% (Mass array).
  • IHC demonstrated high sensitivity (100%) and specificity (94.4%). Sanger sequencing and Mass array showed 96.9% sensitivity and 100% specificity.
  • A combined approach of IHC and Sanger sequencing achieved 100% sensitivity and specificity.

Conclusions:

  • Immunohistochemistry (IHC) is a rapid and effective method for routine H3K27M mutation detection in pathology labs.
  • Combining IHC with Sanger sequencing provides a highly accurate diagnostic strategy for H3K27M status in diffuse midline gliomas.