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Spotless, a reproducible pipeline for benchmarking cell type deconvolution in spatial transcriptomics
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Spotless, a reproducible pipeline for benchmarking cell type deconvolution in spatial transcriptomics
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Journal Article
Spotless, a reproducible pipeline for benchmarking cell type deconvolution in spatial transcriptomics
2024
Overview
Spatial transcriptomics (ST) technologies allow the profiling of the transcriptome of cells while keeping their spatial context. Since most commercial untargeted ST technologies do not yet operate at single-cell resolution, computational methods such as deconvolution are often used to infer the cell type composition of each sequenced spot. We benchmarked 11 deconvolution methods using 63 silver standards, 3 gold standards, and 2 case studies on liver and melanoma tissues. We developed a simulation engine called synthspot to generate silver standards from single-cell RNA-sequencing data, while gold standards are generated by pooling single cells from targeted ST data. We evaluated methods based on their performance, stability across different reference datasets, and scalability. We found that cell2location and RCTD are the top-performing methods, but surprisingly, a simple regression model outperforms almost half of the dedicated spatial deconvolution methods. Furthermore, we observe that the performance of all methods significantly decreased in datasets with highly abundant or rare cell types. Our results are reproducible in a Nextflow pipeline, which also allows users to generate synthetic data, run deconvolution methods and optionally benchmark them on their dataset ( https://github.com/saeyslab/spotless-benchmark ).
Publisher
eLife Sciences Publications Ltd
