Cited by 5,631Single-cell and spatial transcriptomicsBioinformatics and Genomic NetworksGenomics and Chromatin Dynamics

Dictionary learning for integrative, multimodal and scalable single-cell analysis

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Hao, Yuhan, Stuart, Tim, Kowalski, Madeline H., Choudhary, Saket, Hoffman, Paul, Hartman, Austin, Srivastava, Avi, Molla, Gesmira +3 more·2024·Nature Biotechnology

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Abstract

Mapping single-cell sequencing profiles to comprehensive reference datasets provides a powerful alternative to unsupervised analysis. However, most reference datasets are constructed from single-cell RNA-sequencing data and cannot be used to annotate datasets that do not measure gene expression. Here we introduce 'bridge integration', a method to integrate single-cell datasets across modalities using a multiomic dataset as a molecular bridge. Each cell in the multiomic dataset constitutes an element in a 'dictionary', which is used to reconstruct unimodal datasets and transform them into a shared space. Our procedure accurately integrates transcriptomic data with independent single-cell measurements of chromatin accessibility, histone modifications, DNA methylation and protein levels. Moreover, we demonstrate how dictionary learning can be combined with sketching techniques to improve computational scalability and harmonize 8.6 million human immune cell profiles from sequencing and mass cytometry experiments. Our approach, implemented in version 5 of our Seurat toolkit ( http://www.satijalab.org/seurat ), broadens the utility of single-cell reference datasets and facilitates comparisons across diverse molecular modalities.

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  • SCTransform accounts for differences in library size across cell types.

    “Datasets were then normalized and scaled using Seurat 5.0.1 SCTransform to account for differences in library size across cell types [31].”

    From APOE Christchurch enhances a disease-associated microglial response to plaque but suppresses response to tau pathology (2025) · cites this paper as [31]

    The Results sections on reference mapping and community-scale integration discuss aligning and annotating cell populations, not SCTransform’s normalization behavior. Searches for SCTransform, library size, and sequencing-depth normalization found no passage in our copy addressing whether SCTransform accounts for library-size differences across cell types. (LLM, conf=0.70)

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Authors
Hao, Y., Stuart, T., Kowalski, M. H., Choudhary, S., Hoffman, P., Hartman, A., Srivastava, A., Molla, G., Madad, S., Fernandez-Granda, C., & Satija, R.
Affiliations
  • New York Genome Center (US)
  • NYU Langone Health (US)
  • New York University (US)
Corresponding author
Satija, Rahul
Venue
Nature Biotechnology
Published
2023-05-25
Volume
42
Issue
2
Pages
293-304
ISSN
  • 0733-222X (ISSN-L)
  • 1087-0156
  • 1546-1696
OpenAlex
W4378212544
Cited by
5,631
References
23
Citations by year
2026: 2814 · 2025: 2053 · 2024: 699 · 2023: 53 · 2022: 8 · 2021: 2
FWCI
488.32
Type
journal article
Language
en
Open access
Locations
  • Nature Biotechnology (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • Chan Zuckerberg Initiative (HCA-A1704-01895, EOSS-0000000082)
  • National Institutes of Health (1dp2hg009623-01, 5k99hg011489-02, OT2OD026673, OT2OD033760, K99HG011489-01)
  • National Human Genome Research Institute (DP2-HG-009623, K99 HG011489, RM1HG011014)
  • National Cancer Institute (K99CA267677, U24CA268108)
  • National Institute of Neurological Disorders and Stroke (UG3NS132139, R35NS097404)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (R01HD096770)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Single-cell and spatial transcriptomics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Bioinformatics and Genomic Networks
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
Keywords
dictionary learning, single-cell data integration, chromatin accessibility, histone modifications, DNA methylation, protein abundance, sketching, mass cytometry, immune cell profiles
MeSH terms
Humans, Software, Sequence Analysis, RNA, Gene Expression Profiling, Single-Cell Analysis, Transcriptome

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