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Sample indexing for single cells

  • US 10,669,570 B2
  • Filed: 06/19/2018
  • Issued: 06/02/2020
  • Est. Priority Date: 06/05/2017
  • Status: Active Grant
First Claim
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1. A method, comprising:

  • (a) contacting a first sample comprising a first plurality of cells and a second sample comprising a second plurality of cells with a first oligonucleotide-conjugated antibody and a second oligonucleotide-conjugated antibody, respectively, to form a first barcoded sample and a second barcoded sample, respectively, each comprising cells associated with the first oligonucleotide-conjugated antibody and the second oligonucleotide-conjugated antibody, respectively,wherein the first antibody is capable of specifically binding to a protein target of each of the first plurality of cells, and is conjugated with a first sample indexing oligonucleotide comprising a poly(A) tail and a first sample indexing sequence,wherein the second antibody is capable of specifically binding to a protein target of each of the second plurality of cells, and is conjugated with a second sample indexing oligonucleotide comprising a poly(A) tail and a second sample indexing sequence,wherein the first sample indexing sequence and the second sample indexing sequence comprise different sequences andwherein the protein target of each of the first plurality of cells and the protein target of each of the second plurality of cells are the same;

    (b) pooling the first barcoded sample and the second barcoded sample to form a combined barcoded sample comprising the first plurality of cells associated with the first oligonucleotide-conjugated antibody and the second plurality of cells associated with the second oligonucleotide-conjugated antibody;

    (c) partitioning the first plurality of cells associated with the first oligonucleotide-conjugated antibody and the second plurality of cells associated with the second oligonucleotide-conjugated antibody of the combined barcoded sample to a plurality of partitions, wherein partitions of the plurality of partitions each comprises a single cell of the combined barcoded sample;

    (d) in each of the partitions of the plurality of partitions, contacting a barcoding particle with the first sample indexing oligonucleotide or the second sample indexing oligonucleotide, wherein the barcoding particle comprises a plurality of oligonucleotide probes each comprising a poly(T) region and a barcode sequence common to the plurality of oligonucleotide probes of the barcoding particle;

    (e) extending each oligonucleotide probe hybridized to the first sample indexing oligonucleotide or the second indexing oligonucleotide via the hybridization between the poly(A) tail of the first sample indexing oligonucleotide or the second sample indexing oligonucleotide and the poly(T) region of the oligonucleotide probe to produce a first labeled nucleic acid or a second labeled nucleic acid, wherein the first labeled nucleic acid and the second labeled nucleic acid comprises a first sample indexing sequence and a second sample indexing sequence, respectively, or a complementary sequence thereof, and the barcode sequence; and

    (f) obtaining sequencing information of the first labeled nucleic acid comprising the first sample indexing sequence or the second labeled nucleic acid comprising the second sample indexing sequence, or a portion thereof; and

    (g) determining each single cell in the partitions of the plurality of partitions of the combined barcoded sample is from the first sample or the second sample based on the first sample indexing sequence or the second sample indexing sequence, respectively, a complementary sequence thereof, or a portion thereof, in the sequence information.

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