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Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
Multiplatform comparison of multiplexed bead arrays using HPV genotyping as a test case
Simon R Corrie1, Qinghua Feng, Tiffany Blair
1HPV Research Laboratory, Department of Pathology, School of Medicine, University of Washington, Seattle, USA.
Summary
This study compares Luminex technology and a novel MPS bead platform for human papillomavirus (HPV) genotyping. Both bead assays demonstrated strong performance against the gold standard, highlighting instrument differences as key for future method validation.
Area of Science:
- Biotechnology
- Molecular Diagnostics
- Medical Technology
Background:
- Direct comparisons of different bead-based assays are limited.
- Luminex technology requires specific instrumentation, posing a barrier to adoption.
- Advancements in flow cytometry enable new bead-based assay development.
Purpose of the Study:
- To conduct an unbiased technical comparison of Luminex technology and an in-house 3-mercaptopropyl trimethoxysilane (MPS) bead platform.
- To evaluate the performance of these bead-based assays for human papillomavirus (HPV) genotyping.
- To assess the impact of instrument differences on assay comparison.
Main Methods:
- Compared Luminex and MPS bead assays against the Roche Line Blot (RLB) assay for HPV genotyping.
- Analyzed 200 clinical samples using receiver-operator characteristic (ROC) curve analysis.
- Investigated instrument-based differences in assay performance.
Main Results:
- Both Luminex and MPS bead assays performed well in ROC curve analysis compared to the RLB gold standard.
- Significant instrument-based differences were identified as a critical factor in comparative studies.
- The MPS bead platform is designed for integration with generic cytometry instruments.
Conclusions:
- Bead-based assays, including Luminex and the novel MPS platform, are suitable for multiplexed HPV genotyping.
- Instrument variability must be considered when comparing different bead-based assay methods.
- Multi-platform analyses are crucial for validating new diagnostic methods and understanding assay limitations.
