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Updated: May 15, 2026
13:24
Integration of Wet and Dry Bench Processes Optimizes Targeted Next-generation Sequencing of Low-quality and Low-quantity Tumor Biopsies
Published on: April 11, 2016
Combining highly multiplexed PCR with semiconductor-based sequencing for rapid cancer genotyping
Carol Beadling1, Tanaya L Neff, Michael C Heinrich
1Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA.
The Journal of Molecular Diagnostics : JMD
|January 1, 2013
Summary
This study presents a rapid semiconductor sequencing method for identifying cancer mutations in formalin-fixed, paraffin-embedded (FFPE) tissues. The assay requires minimal DNA and achieves high sensitivity and specificity for actionable mutation detection in clinical settings.
Area of Science:
- Oncology
- Genomics
- Molecular Diagnostics
Background:
- Clinical cancer specimen analysis requires efficient identification of actionable mutations.
- Formalin-fixed, paraffin-embedded (FFPE) tissues present challenges due to limited DNA quantity and quality.
- Existing genotyping platforms need rapid turnaround times for clinical utility.
Purpose of the Study:
- To develop and validate a semiconductor sequencing assay for detecting mutations in FFPE cancer specimens.
- To assess the assay's performance regarding turnaround time, DNA input requirements, sensitivity, and specificity.
- To evaluate the assay's suitability for routine clinical laboratory use.
Main Methods:
- A single-tube, multiplexed panel targeting 46 cancer genes (190 amplicons) was designed for semiconductor sequencing.
- DNA from FFPE specimens was sequenced using the multiplex panel, requiring only 10 ng of input DNA.
- Assay performance was validated on 45 FFPE tumor specimens with known mutations, comparing results to a mass spectrometry-based platform.
Main Results:
- The assay achieved average read depths of 2000× with >95% reads on target within 48 hours.
- 100% sensitivity and 95.1% specificity were achieved for point mutation detection with an 8% mutant allele ratio cutoff.
- All indels were detectable, with 6/9 indels ≤12 bp successfully called by variant caller software.
Conclusions:
- Multiplex PCR and semiconductor-based sequencing offer a viable approach for mutation detection in clinical laboratories.
- The assay's rapid turnaround time and low DNA input requirements address key challenges in FFPE specimen analysis.
- This method facilitates routine identification of actionable mutations, supporting personalized cancer treatment.
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