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Warfarin genotyping with hybridization-induced aggregation on a poly(ethylene terephthalate) microdevice
Hillary S Sloane1, Morgan B Carter1, Alexa E C Cecil1
1Department of Chemistry, University of Virginia, Charlottesville, Virginia 22904, USA. landers@virginia.edu.
The Analyst
|December 20, 2016
Summary
A new, rapid genotyping method for warfarin sensitivity using multiplex PCR and Hybridization-induced Aggregation (HIA) offers an affordable alternative. This technique provides accurate results in under an hour, improving personalized medicine for anticoagulant therapy.
Area of Science:
- Pharmacogenomics
- Molecular Diagnostics
- Biotechnology
Background:
- Warfarin, a critical anticoagulant, exhibits significant inter-individual response variability due to genetic factors.
- Its narrow therapeutic index and associated adverse events necessitate personalized dosing strategies.
- Current warfarin genotyping methods often face limitations in speed and cost for routine clinical application.
Purpose of the Study:
- To develop and validate a novel, rapid, and cost-effective method for warfarin genotyping.
- To assess the feasibility of integrating multiplex PCR and Hybridization-induced Aggregation (HIA) for clinical genetic testing.
- To improve the accessibility of genotype-guided warfarin dosing.
Main Methods:
- Multiplex allele-specific PCR was employed to amplify key genetic variants (CYP2C9 *2, CYP2C9 *3, VKORC1 1173C>T) and an internal control.
- Hybridization-induced Aggregation (HIA), a bead-based detection technique, was utilized for sequence-specific identification of PCR products.
- The assay was performed on poly(ethylene terephthalate) (PeT) microdevices, enabling rapid, simultaneous detection.
Main Results:
- The developed method achieved warfarin genotyping results in approximately 15 minutes post-PCR, with full sample-to-answer turnaround under an hour.
- Genotyping of 23 patient DNA samples demonstrated 100% concordance with a validated commercial assay (WARFGENO test).
- The successful transfer of PCR chemistry to PeT chips highlights the potential for integrated, automated genotyping platforms.
Conclusions:
- Multiplex PCR coupled with HIA offers a simple, rapid, and affordable approach for warfarin genotyping.
- This method has the potential to facilitate routine genotype-guided warfarin dosing, thereby reducing adverse drug events.
- The demonstrated integration on PeT microdevices paves the way for point-of-care, sample-to-answer genetic testing solutions.
