Interpretable Single-Cell Set Classification with Kernel Mean Embeddings

• URL: http://arxiv.org/abs/2201.07322v1
• Date: Tue, 18 Jan 2022 21:40:36 GMT
• Title: Interpretable Single-Cell Set Classification with Kernel Mean Embeddings
• Authors: Siyuan Shan, Vishal Baskaran, Haidong Yi, Jolene Ranek, Natalie Stanley, Junier Oliva
• Abstract summary: Kernel Mean Embedding encodes the cellular landscape of each profiled biological sample. We train a simple linear classifier and achieve state-of-the-art classification accuracy on 3 flow and mass datasets.
• Score: 14.686560033030101
• License: http://creativecommons.org/publicdomain/zero/1.0/
• Abstract: Modern single-cell flow and mass cytometry technologies measure the expression of several proteins of the individual cells within a blood or tissue sample. Each profiled biological sample is thus represented by a set of hundreds of thousands of multidimensional cell feature vectors, which incurs a high computational cost to predict each biological sample's associated phenotype with machine learning models. Such a large set cardinality also limits the interpretability of machine learning models due to the difficulty in tracking how each individual cell influences the ultimate prediction. Using Kernel Mean Embedding to encode the cellular landscape of each profiled biological sample, we can train a simple linear classifier and achieve state-of-the-art classification accuracy on 3 flow and mass cytometry datasets. Our model contains few parameters but still performs similarly to deep learning models with millions of parameters. In contrast with deep learning approaches, the linearity and sub-selection step of our model make it easy to interpret classification results. Clustering analysis further shows that our method admits rich biological interpretability for linking cellular heterogeneity to clinical phenotype.

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