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Clustering Algorithms: Their Application to Gene Expression Data

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TLDR
This review examines the various clustering algorithms applicable to the gene expression data in order to discover and provide useful knowledge of the appropriate clustering technique that will guarantee stability and high degree of accuracy in its analysis procedure.
Abstract
Gene expression data hide vital information required to understand the biological process that takes place in a particular organism in relation to its environment. Deciphering the hidden patterns in gene expression data proffers a prodigious preference to strengthen the understanding of functional genomics. The complexity of biological networks and the volume of genes present increase the challenges of comprehending and interpretation of the resulting mass of data, which consists of millions of measurements; these data also inhibit vagueness, imprecision, and noise. Therefore, the use of clustering techniques is a first step toward addressing these challenges, which is essential in the data mining process to reveal natural structures and identify interesting patterns in the underlying data. The clustering of gene expression data has been proven to be useful in making known the natural structure inherent in gene expression data, understanding gene functions, cellular processes, and subtypes of cells, mining useful information from noisy data, and understanding gene regulation. The other benefit of clustering gene expression data is the identification of homology, which is very important in vaccine design. This review examines the various clustering algorithms applicable to the gene expression data in order to discover and provide useful knowledge of the appropriate clustering technique that will guarantee stability and high degree of accuracy in its analysis procedure.

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Citations
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Bayesian cluster analysis

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Proceedings ArticleDOI

Single-cell Clustering Based on Word Embedding and Nonparametric Methods

TL;DR: A new method that is based on a nonparametric Earth Mover's Distance and leveraging a novel word embedding approach to cluster cells and results indicate that GMD outperformed the methods in clustering single cells in terms of Adjusted Random Index and Fowlkes Mallows Index.
Journal ArticleDOI

Gene Expression Analysis through Parallel Non-Negative Matrix Factorization

TL;DR: This work proposes a clustering algorithm based on Non-negative Matrix Factorization and K-means to reduce data dimensionality but whilst preserving the biological context and prioritizing gene selection, and it is implemented within parallel GPU-based environments through the CUDA library.
References
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Proceedings Article

A density-based algorithm for discovering clusters a density-based algorithm for discovering clusters in large spatial databases with noise

TL;DR: In this paper, a density-based notion of clusters is proposed to discover clusters of arbitrary shape, which can be used for class identification in large spatial databases and is shown to be more efficient than the well-known algorithm CLAR-ANS.
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What are applications of clustering algorithms?

Applications of clustering algorithms include revealing natural structures in gene expression data, understanding gene functions, identifying cell subtypes, mining information from noisy data, and aiding in vaccine design.