Related Experiment Video
Updated: May 24, 2026
10:16
Employing Digital Droplet PCR to Detect BRAF V600E Mutations in Formalin-fixed Paraffin-embedded Reference Standard Cell Lines
Published on: October 8, 2015
IDH mutation detection in formalin-fixed paraffin-embedded gliomas using multiplex PCR and single-base extension
Marco Perizzolo1, Bob Winkfein, Susan Hui
1Calgary Laboratory Services, The University of Calgary, Calgary, Alberta, Canada.
Brain Pathology (Zurich, Switzerland)
|February 25, 2012
Summary
A new PCR-based SNaPshot assay accurately detects Isocitrate dehydrogenase (IDH) mutations in gliomas. This fast and sensitive method offers improved diagnostic capabilities for IDH-mutated tumors.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Isocitrate dehydrogenase (IDH) gene mutations are prevalent in gliomas, myeloid leukemias, and chondroid neoplasms.
- IDH mutations in gliomas serve as a prognostic marker, correlating with a proneural subclass and improved patient survival.
Purpose of the Study:
- To develop and validate a simple, rapid, and sensitive PCR-based assay for detecting IDH1 and IDH2 mutations.
Main Methods:
- A multiplexed PCR reaction followed by a multiplexed SNaPshot reaction and capillary electrophoresis was employed.
- The assay was validated on 32 paraffin-embedded glioma specimens using a blinded study, comparing results to PCR/direct sequencing.
- An additional 57 diagnostic specimens were tested to evaluate the assay's utility in clinical settings.
Main Results:
- The SNaPshot assay demonstrated 100% concordance with PCR/direct sequencing in the blinded validation study.
- The assay provided faster and easier data analysis, yielding results within one day from DNA extraction.
- The SNaPshot assay detected mutant alleles at a lower frequency (5%) compared to PCR-sequencing (20%).
Conclusions:
- The developed SNaPshot assay is a fast, sensitive, and straightforward method for reliably detecting common IDH gene mutations in glial neoplasms.
- This assay offers significant advantages in speed, sensitivity, and ease of use for diagnosing IDH-mutated tumors.
