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Gene-Specific Variant Classifier (DPYD-Varifier) to Identify Deleterious Alleles of Dihydropyrimidine Dehydrogenase
Journal article   Peer reviewed

Gene-Specific Variant Classifier (DPYD-Varifier) to Identify Deleterious Alleles of Dihydropyrimidine Dehydrogenase

Shikshya Shrestha, Cheng Zhang, Calvin R. Jerde, Qian Nie, Hu Li, Steven M. Offer and Robert B. Diasio
Clinical pharmacology and therapeutics, Vol.104(4), pp.709-718
10/2018
DOI: 10.1002/cpt.1020
PMCID: PMC6043412
PMID: 29327356
url
https://www.ncbi.nlm.nih.gov/pmc/articles/6043412View
Open Access

Abstract

Deleterious variants in dihydropyrimidine dehydrogenase (DPD, DPYD gene) can be highly predictive of clinical toxicity to the widely prescribed chemotherapeutic 5-fluorouracil (5-FU). However, there are very limited data pertaining to the functional consequences of the >450 reported no-synonymous DPYD variants. We developed a DPYD-specific variant classifier (DPYD-Varifier) using machine learning and in vitro functional data for 156 missense DPYD variants. The developed model showed 85% accuracy and outperformed other in silico prediction tools. An examination of feature importance within the model provided additional insight into functional aspects of the DPD protein relevant to 5-FU toxicity. In the absence of clinical data for unstudied variants, prediction tools like DPYD-Varifier have great potential to individualize medicine and improve the clinical decision-making process.
Life Sciences & Biomedicine Pharmacology & Pharmacy Science & Technology

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