Systems, methods, and compositions for generating multi-omic information from single cells
View Patent ↗Single-cell multi-omics by co-encapsulating a single cell with two beads, the first an RNA barcoding bead having barcoded mRNA capture primer oligonucleotides attached on the bead surface; and the second a DNA barcoding bead having two types of oligonucleotides releasably attached to the surface: (1) barcoded adapter oligonucleotides that are complementary to oligonucleotides bound to the transposase that are eventually incorporated into gDNA fragments and (2) polyadenylated barcoded oligonucleotides containing the same barcode sequence as the adapters. In addition, integrated analysis of RNA and protein, including intracellular protein, from individual cells using similar co-encapsulation of a single cell, an RNA barcoding bead, and with/without a specific or non-specific protein binding bead in a microwell, to avoid protein fixation by first lysing the cell to liberate intracellular contents, and then capturing protein either on a solid surface or in solution with barcoded affinity reagents.
1 . A method for generating linked single cell RNA sequencing (scRNA-seq) and single cell DNA sequencing (scDNA-seq) libraries, comprising:
(a) flowing cells onto an asymmetric microwell array device, wherein each microwell viewed from above has a pear-shaped cross-section with a wider and a narrower region;
(b) flowing onto the array a plurality of the larger sized of DNA barcoding beads or RNA barcoding beads, wherein the larger sized beads and the microwells have relative size permitting only one larger sized bead to fit in the wider region of each microwell, wherein the DNA barcoding beads comprise a plurality of oligonucleotides attached via a cleavable linker on the bead surface, the oligonucleotides comprising;
(i) a first subset of barcoded oligonucleotides comprising a transposase adaptor, a genomic DNA (gDNA) cell barcode identical for all oligonucleotides on the bead, a PCR adaptor, and optionally a unique molecular identifier (UMI) barcode, wherein the transposase adaptor can hybridize to a transposase-integrated universal adaptor sequence in gDNA, and
(ii) a second subset of polyadenylated barcoded oligonucleotides comprising a PCR adaptor, the gDNA cell barcode, a poly(dA), and optionally a UMI barcode, and
wherein the RNA barcoding beads comprise a plurality of oligonucleotides attached on the surface, said oligonucleotides comprising a PCR adaptor, a cDNA cell barcode identical for all oligonucleotides on one bead, a poly(dT), and optionally a UMI barcode;
(c) flowing a plurality of the smaller sized of the DNA barcoding beads or the RNA barcoding beads onto the array, wherein the smaller sized beads and the microwells have relative size permitting only one smaller sized bead to fit in the narrower region of each microwell;
(d) flowing lysis buffer onto the array to release gDNA and mRNA and capture mRNA on the RNA barcoding beads;
(e) flowing wash buffer onto the array to remove cell lysate and retain gDNA in the microwells;
(f) flowing a transposase onto the microwell to integrate universal adapters into the gDNA;
(g) flowing a chemical or enzymatic reagent onto the array or exposing the array to UV radiation to release the oligonucleotides on the DNA barcoding, whereby the barcoded oligonucleotides comprising the transposase adaptor hybridize to the transposase-integrated universal adapter in the gDNA, and the polyadenylated barcoded oligonucleotides hybridize to the RNA barcoding bead;
(h) flowing a neutralization buffer onto the array to release transposed, barcoded gDNA fragments from the transposases, whereby a pooled genomic sequencing library can be generated from the gDNA fragments;
(i) flowing a reverse transcription mixture onto the array to reverse transcribe the mRNA to cDNA; and
(j) collecting the RNA barcoding beads with attached cDNA, whereby a pooled RNA sequencing library can be generated from the cDNA that also contains barcode information for linking to the gDNA fragments from the same cell.
2 . The method of 1 , further comprising flowing oil onto the array immediately after flowing the lysis buffer in step (d) and immediately after flowing transposase onto the array in step (f) to seal the microwells.
3 . The method of claim 1 , wherein the second subset of polyadenylated barcoded oligonucleotides comprises less than 10%, less than 5%, or less than 1% of the first subset of barcoded oligonucleotides.
4 . The method of claim 1 , wherein the cleavable linker is an enzymatically cleavable linker, a photocleavable linker, or a chemically cleavable linker.
5 . The method of claim 1 , wherein the cleavable linker is photocleavable biotin or an enzymatically cleavable dU-base.
6 . The method of claim 1 , wherein the DNA barcoding bead is a polymer bead, wherein the polymer comprises polystyrene (PS), polycaprolactone (PCL), polyisoprene (PIP), poly(lactic acid), polyethylene, polypropylene, polyacrylonitrile, polyimide, polyamide, polyacrylamide, latex, silica, or agarose, and/or mixtures and/or co-polymers thereof.
7 . The method of claim 1 , wherein the cells are flowed onto the array under limiting dilution to maximize the number of microwells that contain a single cell.
8 . The method of claim 1 , further comprising imaging the cells one or more times after flowing the cells onto the microwell array device.
9 . A method for generating pooled single cell RNA sequencing (scRNA-seq) libraries with barcode information for linking to epitopes from the same single cell, comprising:
(a) flowing cells onto an asymmetric microwell array device, wherein each microwell viewed from above has a pear-shaped cross-section with a wider and a narrower region;
(b) flowing onto the array a plurality of the larger sized of epitope barcoding beads or RNA barcoding beads, wherein the larger sized beads and the microwells have relative size permitting only one larger sized bead to fit in the wider region of each microwell, wherein the epitope barcoding beads comprise a plurality of oligonucleotides attached via a cleavable linker on the bead surface, the oligonucleotides comprising (i) a first subset of barcoded oligonucleotides comprising a PCR adaptor, an epitope cell barcode identical for all oligonucleotides on the bead, a hybridization sequence, and optionally a unique molecular identifier (UMI) barcode,
wherein the hybridization sequence can hybridize to a universal adaptor sequence on DNA barcoded antibodies or aptamers, and (ii) a second subset of polyadenylated barcoded oligonucleotides comprising a PCR adaptor, the epitope cell barcode, a poly(dA), and optionally a UMI barcode, and wherein the RNA barcoding beads comprise a plurality of oligonucleotides attached on the surface, said oligonucleotides comprising a PCR adaptor, a cDNA cell barcode identical for all oligonucleotides on one bead, a poly(dT), and optionally a UMI barcode;
(c) flowing a plurality of the smaller sized of the epitope barcoding beads or the RNA barcoding beads onto the array, wherein the smaller sized beads and the microwells have relative size permitting only one smaller sized bead to fit in the narrower region of each microwell;
(d) flowing lysis buffer with DNA barcoded antibodies/aptamers onto the array, whereby released mRNA hybridizes to RNA barcoding beads and antibodies/aptamers bind to released cellular proteins;
(e) flowing a chemical or enzymatic reagent onto the array or exposing the array to UV radiation to release the oligonucleotides on the epitope barcoding bead, whereby the barcoded oligonucleotides hybridize to the universal adapter on the DNA barcoded antibodies/aptamers, and the polyadenylated barcoded oligonucleotides hybridize to the RNA barcoding bead;
(f) flowing wash buffer onto the array and collecting a solution phase containing the DNA barcoded antibodies/aptamers bound to released cellular proteins;
(g) flowing a reverse transcription mixture onto the array to reverse transcribe the mRNA to cDNA; and
(h) collecting the RNA barcoding beads with attached cDNA, whereby a pooled RNA sequencing library can be generated from the cDNA that also contains barcode information for linking to the intracellular and surface epitopes from the same cell.
10 . The method of 9 , further comprising flowing oil onto the array immediately after flowing the lysis buffer in step (d) to seal the microwells.
11 . The method of claim 9 , wherein the second subset of polyadenylated barcoded oligonucleotides comprises less than 10%, less than 5%, or less than 1% of the first subset of barcoded oligonucleotides.
12 . The method of claim 9 , wherein the cleavable linker is an enzymatically cleavable linker, a photocleavable linker, or a chemically cleavable linker.
13 . The method of claim 9 , wherein the cleavable linker is photocleavable biotin or an enzymatically cleavable dU-base.
14 . The method of claim 9 , wherein the epitope barcoding bead is a polymer bead, wherein the polymer comprises polystyrene (PS), polycaprolactone (PCL), polyisoprene (PIP), poly(lactic acid), polyethylene, polypropylene, polyacrylonitrile, polyimide, polyamide, polyacrylamide, latex, silica, or agarose, and/or mixtures and/or co-polymers thereof.
15 . The method of claim 9 , wherein the cells are flowed onto the array under limiting dilution to maximize the number of microwells that contain a single cell.
16 . The method of claim 9 , further comprising imaging the cells one or more times after flowing the cells into the microarray device.
17 . A method for generating pooled single cell RNA sequencing (scRNA-seq) libraries with barcode information for linking to epitopes from the same single cell, comprising:
(a) flowing a plurality of cells onto an asymmetric microwell array device, wherein each microwell viewed from above has a pear-shaped cross-section with a wider and a narrower region;
(b) flowing onto the array a plurality of the larger sized of protein binding beads or RNA barcoding beads, wherein the larger sized beads and the microwells have relative size permitting only one larger sized bead to fit in the wider region of each microwell, wherein the protein binding beads, optionally, comprise functional groups for protein binding, and wherein the RNA barcoding beads have a plurality of oligonucleotides attached on the surface comprising a PCR adaptor, a cDNA cell barcode identical for all oligonucleotides on one bead, a poly(dT), and an optional UMI barcode, and, optionally, a small subset of the same oligonucleotides having a sequence complementary to that comprised in a plurality of DNA barcoded antibodies/aptamers in place of the poly(dT);
(c) flowing a plurality of the smaller sized of the protein binding beads or the RNA barcoding beads onto the array, wherein the smaller sized beads and the microwells have relative size permitting only one smaller sized bead to fit in the narrower region of each microwell;
(d) flowing lysis buffer onto the array to release cellular mRNA and intra- and extracellular proteins, whereby mRNA hybridizes to the RNA barcoding beads and proteins are captured on the protein binding beads;
(e) optionally, flowing wash buffer onto the array and flowing a reagent onto the array to quench remaining functional groups on the protein binding bead;
(f) flowing onto the array the DNA barcoded antibodies/aptamers to bind to their protein targets, wherein, optionally, the DNA barcodes can contain a hybridized complementary sequence to prevent premature hybridization to the RNA barcoding bead;
(g) flowing protease onto the array to disrupt the antibody/aptamer-protein complexes and to allow DNA barcodes on antibodies/aptamers to hybridize to the RNA barcoding bead;
(h) optionally, flowing wash buffer onto the array;
(i) flowing a reverse transcription mixture onto the array to reverse transcribe the mRNA to cDNA; and
(j) collecting the RNA barcoding beads with attached cDNA, whereby a pooled RNA sequencing library can be generated from the cDNA that also contains barcode information for linking to the intracellular and surface epitopes from the same cell.
18 . The method of 17 , wherein the functional groups for protein binding comprise amine-reactive groups, aldehyde groups, NHS groups, or thiol-reactive groups.
19 . The method of 17 , wherein the protein binding beads comprise hydrophobic surfaces.
20 . The method of 17 , wherein the protein binding beads comprise surfaces coated in aptamers, antibodies, proteins, or protein-binding small molecules to capture specific proteins or specific sets of proteins.
21 . The method of 17 , further comprising flowing oil onto the array immediately after flowing the lysis buffer in step (d) and the protease in step (g) to seal the microwells.
22 . The method of claim 9 , wherein the cells are flowed onto the array under limiting dilution to maximize the number of microwells that contain a single cell.