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bioRxiv · 10.1101/224063

Modelling the Dynamics of Biological Systems with the Geometric Hidden Markov Model

Vangelov, B.·Barahona, M.
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Abstract

Many biological processes can be described geometrically in a simple way: stem cell differentiation can be represented as a branching tree and cell division can be depicted as a cycle. In this paper we introduce the geometric hidden Markov model (GHMM), a dynamical model whose goal is to capture the low-dimensional characteristics of biological processes from multivariate time series data. The framework integrates a graph-theoretical algorithm for dimensionality reduction with a latent variable model for sequential data. We analyzed time series data generated by an in silico model of a biomolecular circuit, the represillator. The trained model has a simple structure: the latent Markov chain corresponds to a two-dimensional lattice. We show that the short-term and long-term predictions of the GHMM reflect the oscillatory behaviour of the genetic circuit. Analysis of the inferred model with a community detection methods leads to a coarse-grained representation of the process.

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Vangelov, B., Barahona, M.. 2017-11-22. Modelling the Dynamics of Biological Systems with the Geometric Hidden Markov Model. https://doi.org/10.1101/224063

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