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Scaling single cell transcriptomics through split pool barcoding

By Alexander B Rosenberg, Charles M. Roco, Richard A. Muscat, Anna Kuchina, Sumit Mukherjee, Wei Chen, David J Peeler, Zizhen Yao, Bosiljka Tasic, Drew L Sellers, Suzie H Pun, Georg Seelig

Posted 02 Feb 2017
bioRxiv DOI: 10.1101/105163 (published DOI: 10.1126/science.aam8999)

Constructing an atlas of cell types in complex organisms will require a collective effort to characterize billions of individual cells. Single cell RNA sequencing (scRNA-seq) has emerged as the main tool for characterizing cellular diversity, but current methods use custom microfluidics or microwells to compartmentalize single cells, limiting scalability and widespread adoption. Here we present Split Pool Ligation-based Transcriptome sequencing (SPLiT-seq), a scRNA-seq method that labels the cellular origin of RNA through combinatorial indexing. SPLiT-seq is compatible with fixed cells, scales exponentially, uses only basic laboratory equipment, and costs one cent per cell. We used this approach to analyze 109,069 single cell transcriptomes from an entire postnatal day 5 mouse brain, providing the first global snapshot at this stage of development. We identified 13 main populations comprising different types of neurons, glia, immune cells, endothelia, as well as types in the blood-brain-barrier. Moreover, we resolve substructure within these clusters corresponding to cells at different stages of development. As sequencing capacity increases, SPLiT-seq will enable profiling of billions of cells in a single experiment.

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