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A Bayesian method to estimate variant-induced disease penetrance

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Listed:
  • Brett M Kroncke
  • Derek K Smith
  • Yi Zuo
  • Andrew M Glazer
  • Dan M Roden
  • Jeffrey D Blume

Abstract

A major challenge emerging in genomic medicine is how to assess best disease risk from rare or novel variants found in disease-related genes. The expanding volume of data generated by very large phenotyping efforts coupled to DNA sequence data presents an opportunity to reinterpret genetic liability of disease risk. Here we propose a framework to estimate the probability of disease given the presence of a genetic variant conditioned on features of that variant. We refer to this as the penetrance, the fraction of all variant heterozygotes that will present with disease. We demonstrate this methodology using a well-established disease-gene pair, the cardiac sodium channel gene SCN5A and the heart arrhythmia Brugada syndrome. From a review of 756 publications, we developed a pattern mixture algorithm, based on a Bayesian Beta-Binomial model, to generate SCN5A penetrance probabilities for the Brugada syndrome conditioned on variant-specific attributes. These probabilities are determined from variant-specific features (e.g. function, structural context, and sequence conservation) and from observations of affected and unaffected heterozygotes. Variant functional perturbation and structural context prove most predictive of Brugada syndrome penetrance.Author summary: The clinical implications for genetic variants, even definitively pathogenic variants, can vary strikingly across individuals. Lack of evidence to estimate the probability of disease from identified genetic variants, especially rare variants, presents a major barrier to integrating genotype information into clinical care. Here we advance an approach to estimate the penetrance, or positive predictive value of the discovery of a genetic variant, in service of advancing the use of genetic information in personalized medicine.

Suggested Citation

  • Brett M Kroncke & Derek K Smith & Yi Zuo & Andrew M Glazer & Dan M Roden & Jeffrey D Blume, 2020. "A Bayesian method to estimate variant-induced disease penetrance," PLOS Genetics, Public Library of Science, vol. 16(6), pages 1-16, June.
  • Handle: RePEc:plo:pgen00:1008862
    DOI: 10.1371/journal.pgen.1008862
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    References listed on IDEAS

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    1. M. T. Oetjens & M. A. Kelly & A. C. Sturm & C. L. Martin & D. H. Ledbetter, 2019. "Quantifying the polygenic contribution to variable expressivity in eleven rare genetic disorders," Nature Communications, Nature, vol. 10(1), pages 1-10, December.
    2. Qiuyun Chen & Glenn E. Kirsch & Danmei Zhang & Ramon Brugada & Josep Brugada & Pedro Brugada & Domenico Potenza & Angel Moya & Martin Borggrefe & Günter Breithardt & Rocio Ortiz-Lopez & Zhiqing Wang &, 1998. "Genetic basis and molecular mechanism for idiopathic ventricular fibrillation," Nature, Nature, vol. 392(6673), pages 293-296, March.
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