Data-driven selection and parameter estimation for DNA methylation mathematical models

JOURNAL OF THEORETICAL BIOLOGY

卷:467

Article

Larson, Karen¹  Zagkos, Loukas²  Mc Auley, Mark³  Roberts, Jason²  Kavallaris, Nikos, I²  Matzavinos, Anastasios¹ 

[1] Brown Univ, Div Appl Math, Providence, RI 02912 USA

[2] Univ Chester, Sch Sci & Engn, Dept Math, Thornton Sci Pk,Pool Lane, Chester CH2 4NU, Cheshire, England

[3] Univ Chester, Sch Sci & Engn, Dept Chem Engn, Thornton Sci Pk,Pool Lane, Chester CH2 4NU, Cheshire, England

关键词: DNA methylation;    Model selection;    Parameter estimation;    Gene promoter;    CpG dyads;   

DOI  :  10.1016/j.jtbi.2019.01.012

来源: Elsevier

【 摘 要 】

Epigenetics is coming to the fore as a key process which underpins health. In particular emerging experimental evidence has associated alterations to DNA methylation status with healthspan and aging. Mammalian DNA methylation status is maintained by an intricate array of biochemical and molecular processes. It can be argued changes to these fundamental cellular processes ultimately drive the formation of aberrant DNA methylation patterns, which are a hallmark of diseases, such as cancer, Alzheimer's disease and cardiovascular disease. In recent years mathematical models have been used as effective tools to help advance our understanding of the dynamics which underpin DNA methylation. In this paper we present linear and nonlinear models which encapsulate the dynamics of the molecular mechanisms which define DNA methylation. Applying a recently developed Bayesian algorithm for parameter estimation and model selection, we are able to estimate distributions of parameters which include nominal parameter values. Using limited noisy observations, the method also identified which methylation model the observations originated from, signaling that our method has practical applications in identifying what models best match the biological data for DNA methylation. (C) 2019 Elsevier Ltd. All rights reserved.

【 授权许可】

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