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A Geometric Clustering Tool (AGCT) to robustly unravel the inner cluster structures of time-series gene expressions

Author

Listed:
  • Richard Nock
  • Natalia Polouliakh
  • Frank Nielsen
  • Keigo Oka
  • Carlin R Connell
  • Cedric Heimhofer
  • Kazuhiro Shibanai
  • Samik Ghosh
  • Ken-ichi Aisaki
  • Satoshi Kitajima
  • Jun Kanno
  • Taketo Akama
  • Hiroaki Kitano

Abstract

Systems biology aims at holistically understanding the complexity of biological systems. In particular, nowadays with the broad availability of gene expression measurements, systems biology challenges the deciphering of the genetic cell machinery from them. In order to help researchers, reverse engineer the genetic cell machinery from these noisy datasets, interactive exploratory clustering methods, pipelines and gene clustering tools have to be specifically developed. Prior methods/tools for time series data, however, do not have the following four major ingredients in analytic and methodological view point: (i) principled time-series feature extraction methods, (ii) variety of manifold learning methods for capturing high-level view of the dataset, (iii) high-end automatic structure extraction, and (iv) friendliness to the biological user community. With a view to meet the requirements, we present AGCT (A Geometric Clustering Tool), a software package used to unravel the complex architecture of large-scale, non-necessarily synchronized time-series gene expression data. AGCT capture signals on exhaustive wavelet expansions of the data, which are then embedded on a low-dimensional non-linear map using manifold learning algorithms, where geometric proximity captures potential interactions. Post-processing techniques, including hard and soft information geometric clustering algorithms, facilitate the summarizing of the complete map as a smaller number of principal factors which can then be formally identified using embedded statistical inference techniques. Three-dimension interactive visualization and scenario recording over the processing helps to reproduce data analysis results without additional time. Analysis of the whole-cell Yeast Metabolic Cycle (YMC) moreover, Yeast Cell Cycle (YCC) datasets demonstrate AGCT's ability to accurately dissect all stages of metabolism and the cell cycle progression, independently of the time course and the number of patterns related to the signal. Analysis of Pentachlorophenol iduced dataset demonstrat how AGCT dissects data to identify two networks: Interferon signaling and NRF2-signaling networks.

Suggested Citation

  • Richard Nock & Natalia Polouliakh & Frank Nielsen & Keigo Oka & Carlin R Connell & Cedric Heimhofer & Kazuhiro Shibanai & Samik Ghosh & Ken-ichi Aisaki & Satoshi Kitajima & Jun Kanno & Taketo Akama & , 2020. "A Geometric Clustering Tool (AGCT) to robustly unravel the inner cluster structures of time-series gene expressions," PLOS ONE, Public Library of Science, vol. 15(7), pages 1-19, July.
  • Handle: RePEc:plo:pone00:0233755
    DOI: 10.1371/journal.pone.0233755
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    References listed on IDEAS

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    1. Karthik Devarajan, 2008. "Nonnegative Matrix Factorization: An Analytical and Interpretive Tool in Computational Biology," PLOS Computational Biology, Public Library of Science, vol. 4(7), pages 1-12, July.
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