pcaReduce: hierarchical clustering of single cell transcriptional profiles

BMC Bioinformatics
Justina Žurauskienė, Christopher Yau

Abstract

Advances in single cell genomics provide a way of routinely generating transcriptomics data at the single cell level. A frequent requirement of single cell expression analysis is the identification of novel patterns of heterogeneity across single cells that might explain complex cellular states or tissue composition. To date, classical statistical analysis tools have being routinely applied, but there is considerable scope for the development of novel statistical approaches that are better adapted to the challenges of inferring cellular hierarchies. We have developed a novel agglomerative clustering method that we call pcaReduce to generate a cell state hierarchy where each cluster branch is associated with a principal component of variation that can be used to differentiate two cell states. Using two real single cell datasets, we compared our approach to other commonly used statistical techniques, such as K-means and hierarchical clustering. We found that pcaReduce was able to give more consistent clustering structures when compared to broad and detailed cell type labels. Our novel integration of principal components analysis and hierarchical clustering establishes a connection between the representation of the expression data...Continue Reading

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Related Concepts

Single-Cell Analysis
Hierarchy
Genome
Sequence Determinations, RNA
Isolation Aspects
Transcription, Genetic
Bio-Informatics
Profile (Lab Procedure)
Genomics
Potassium Ion

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