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Updated: Jul 3, 2026

Candidate Gene Testing in Clinical Cohort Studies with Multiplexed Genotyping and Mass Spectrometry
Published on: June 21, 2018
[Prospective validation of a pharmacogenetic test: the PREDICT-1 study]
Rosa M Muñoz de Benito1, José Ramón Arribas López
1Servicio de Medicina Interna, Hospital del Norte, San Sebastián de los Reyes, Madrid, España.
Screening for HLA-B*5701 before abacavir treatment significantly reduced hypersensitivity reactions. This pharmacogenetic test demonstrated 100% sensitivity and negative predictive value, preventing adverse drug reactions.
Area of Science:
- Pharmacogenetics
- Immunology
- Clinical Medicine
Context:
- Hypersensitivity reactions to abacavir, a crucial antiretroviral drug, can lead to treatment discontinuation.
- Identifying patients at risk via genetic screening can optimize abacavir use.
Purpose:
- To evaluate the clinical utility of HLA-B*5701 screening to prevent abacavir hypersensitivity reactions.
- To assess the impact of genetic screening on abacavir withdrawal rates.
Summary:
- The PREDICT-1 study randomized 1,956 patients to either HLA-B*5701 screening before abacavir or standard monitoring.
- Prospective screening eliminated immunologically confirmed hypersensitivity reactions (0% vs. 2.7%) and reduced clinically suspected reactions (3.4% vs. 7.8%).
- HLA-B*5701 screening showed 100% sensitivity and 100% negative predictive value for abacavir hypersensitivity.
Impact:
- Pharmacogenetic testing for HLA-B*5701 is clinically effective in preventing abacavir-induced hypersensitivity.
- This strategy can reduce unwarranted drug withdrawal, improving patient management and adherence.
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