Title
Pairwise gene GO-based measures for biclustering of high-dimensional expression data
Date Issued
27 March 2018
Access level
open access
Resource Type
journal article
Author(s)
Universidad Pablo de Olavide
Publisher(s)
BioMed Central Ltd.
Abstract
Background: Biclustering algorithms search for groups of genes that share the same behavior under a subset of samples in gene expression data. Nowadays, the biological knowledge available in public repositories can be used to drive these algorithms to find biclusters composed of groups of genes functionally coherent. On the other hand, a distance among genes can be defined according to their information stored in Gene Ontology (GO). Gene pairwise GO semantic similarity measures report a value for each pair of genes which establishes their functional similarity. A scatter search-based algorithm that optimizes a merit function that integrates GO information is studied in this paper. This merit function uses a term that addresses the information through a GO measure. Results: The effect of two possible different gene pairwise GO measures on the performance of the algorithm is analyzed. Firstly, three well known yeast datasets with approximately one thousand of genes are studied. Secondly, a group of human datasets related to clinical data of cancer is also explored by the algorithm. Most of these data are high-dimensional datasets composed of a huge number of genes. The resultant biclusters reveal groups of genes linked by a same functionality when the search procedure is driven by one of the proposed GO measures. Furthermore, a qualitative biological study of a group of biclusters show their relevance from a cancer disease perspective. Conclusions: It can be concluded that the integration of biological information improves the performance of the biclustering process. The two different GO measures studied show an improvement in the results obtained for the yeast dataset. However, if datasets are composed of a huge number of genes, only one of them really improves the algorithm performance. This second case constitutes a clear option to explore interesting datasets from a clinical point of view.
Volume
11
Issue
1
Language
English
OCDE Knowledge area
Bioinformática
Subjects
Scopus EID
2-s2.0-85044596423
Source
BioData Mining
Sponsor(s)
This work was funding by the Spanish Ministry of Economy and Competitiveness and Junta de Andalucía for the financial support under projects TIN2014-55894-C2-R and P12-TIC-1728, respectively.
Sources of information:
Directorio de Producción Científica
Scopus