chromium™) single)cell)3’ solution - hopkins medicine
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Chromium™ Single Cell 3’SolutionHigh-‐throughput Single Cell Gene Expression
July 2016, Revision B
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The Chromium Single Cell 3’ Solution
• GemCode™ Technology
• Automated
• High-‐throughput and scalable
Chromium™ Controller
• Chip for single cell partitioning in GEMs
• Reagents for RT, amplification and library construction
Chromium Single Cell 3’ Consumables
• Informatics solution for single cell expression profiling
• Pre-‐processing, QC and analytics
Cell Ranger™ Pipelines
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Gel Bead-‐in-‐Emulsion (GEM)
Single T Cell
Functionalized Gel Bead
RT Reagents in Solution
Partitioning Oil
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High Diversity Barcode Library
High-‐diversity Library
Functional Oligo with BarcodeGel Bead Scaffold
R2P7 10X BC Poly(dT)VN
• 750,000 Discrete Reagents in One Tube• Defined 14 base pair barcode sequence• Highly uniform size and barcode representation• Built-‐in sequencing adapter, barcode and primer
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Partitioning and Barcoding of Single Cells
• Super-‐Poisson loading of barcoded beads into droplets• Poisson loading of cells in GEMs• Beads dissolve for efficient, liquid phase biochemistry• Cell lysis starts immediately following encapsulation
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Efficient Scalable Workflow
Single-‐use microfluidics chip
User controlled trade-‐off between cell numbers and doublet rate
Gel Bead wellSample well
Oil well
Recovery well
• Up to 8 channels processed in parallel• 1,000 to 6,000 cells per channel• 10 minute run time per chip• Up to 30 um cell diameter tested• ~50 % cell processing efficiency• Temperature Range 18-‐280C
Number of Cells Expected Doublet Rate (%)*
1,200 ~1.2
3,000 ~2.9
6,000 ~5.7
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Assay Scheme for 3’ mRNA Sequencing
In GEM RT with oligo(dT)VNmRNA
GGG
CCC
Template Switching RT
First Strand Synthesis
TSO
CCCOligo(dT)VNR210XP7
Oligo(dT)VNR210XP7
Oligo(dT)VNR210XP7
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Assay Scheme for 3’ mRNA Sequencing
cDNA amplification by PCR
Shearing, A tailing, ligation and SI PCR
Primer
R1 SI P5
CCC
Primer
Oligo(dT)VNR210XP7
Oligo(dT)VNR210XP7
In Bulk
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Single Cell 3’ End-‐to-‐End Workflow
Cell preparation1
Partition and RT inside each GEM2
Pool and cDNA amplification3
Covaris shearing4
Adapter ligation and sample index PCR5
Sequencing and analysis6
Total Turn-‐around Time: ~12 HrsTotal Hands-‐on Time: ~4 Hrs
Reagents and Consumablesin 10X Kit
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• Complete software package for single cell analysis
• Bundled with STAR for efficient transcriptome alignment
• Outputs are standard formats plus Loupe visualization
Cell Ranger – Informatics Workflow
Cell Ranger™Analysis Pipelines
Loupe™Cell Browser
Standard Informaticssamtools, Python, R
BAM
HDF5
MEX
LOUPE
BCL
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Cell Ranger – Output Files
• Indexed BAM containing position-‐sorted, aligned reads• Barcodes and UMIs attached as standard tags
BAM – Genome-‐Aligned Reads
• Market Exchange format• Suitable for downstream analysis in Python and R
MEX – Gene/Barcode Matrix
• Run metrics and basic static visualizations
HTML, CSV – Run Summary
CSV -‐ Run Analysis
Gene ATCAGGGACAGA AGGGAAAATTGA TTGCCTTACGCG TGGCGAAGAGAT TACAATTAAGGC
LOXL4 0 0 0 0 0
PYROXD2 1 0 1 1 0
HPS1 23 12 9 8 3
CNNM1 0 2 1 0 0
GOT1 22 6 7 9 3
• 2D projections• Cell clustering• Differential expression
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Example 1: Validation of Single Cell Behavior
Human:Mouse
Human only
Mouse only
Human Transcript Counts
Mou
se Transcript Co
unts
60,00000
• 1:1 mixture of ~1,400 human (HEK293T) and mouse (NIH3T3) cells
• 99.4% of cell-‐occupied GEMs yielded reads mapping to only one species
• 1% inferred doublet rate*
*includes unobserved human:human and mouse:mouse doubletsNumber of cells detected: ~1400 cells, Number of raw reads per cell: ~130k
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Example 2: Cell Cycle Phases
Combined Expression of Known Phase MarkersG1/S
S
G2
G2/M
M/G1Expression
level
HEK293T Cells Ordered by Inferred Cell Cycle Phase
0 100 200 300 400
• Proliferating HEK293T cells were profiled and scored for expression of markers associated with each major cell cycle phase
• Cells from all phases were identified
Phase-‐specific genes derived from Whitfield et al., 2002Number of cells detected: ~400 cells, Number of raw reads per cell: ~40k
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Example 3: Breast Cancer Heterogeneity
HCC1954
HCC38
HCC1143
t-‐SNE Projection
log(x+1) HER2counts
HCC1954
HCC38
HCC1143
t-‐SNE Projection
Unbiased Automatic Clustering of Three Breast Cell Lines
HER2 Expression Matches Expected Cell Line Status
Number of cells detected: ~1000 cells, Number of raw reads per cell: ~40k
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Example 4: Identifying Rare Cell TypesB-Cell (Raji) T-Cell (Jurkat)
-20 -10 0 10 20PC1
-20 -10 0 10 20PC1
-20 -10 0 10 20PC1
-20 -10 0 10 20PC1
-20 -10 0 10 20PC1
-20
-10
0
10
20
PC
2
-20
-10
0
10
20
PC
2
-20
-10
0
10
20
PC
2
-20
-10
0
10
20
PC
2
-20
-10
0
10
20
PC
2
12% 1.5% 0.6%
• Jurkat and Raji cells were combined at 9:1, 99:1 and 199:1 ratios and then profiled
• The minority Raji populations were identified in all three mixtures
Number of cells detected: ~1000 cells, Number of raw reads per cell: ~60k
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Example 5: Primary Cell Populations
Platelets andPlasma Components
Erythrocytes(RBCs), Eosinophilsand Neutrophils
Myeloid Cells Lymphoid Cells
Monocytes
MyeloidDendritic Cells
Whole Blood
Macrophages
Plasmacytoid DendriticCells
B Cells NK Cells T Cells
Mononuclear Cells(PBMCs)• A complex mixture of different cell
types• Well-‐studied and readily available primary cells
Peripheral Blood Mononuclear Cells (PBMC)
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Major populations of PBMCs are detected
CD4+ T (28.4%)
CD14+ Monocytes (5.3%)
CD56+ NK (13.5%)
CD34+ Progenitors (0.3%)
Dendritic (1.9%)
CD19+ B (5.5%)
CD8+ T (18.7%)
CD45 RA+ Naïve T (26.4%)
TSNE1
TSNE2
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Example: 68,000 Human PBMCs
• CD45RA+Naïve T Cells• CD4+ T Cells• CD8+ T Cells• CD14+ Monocytes• CD19+ B Cells• CD34+ Myeloid Progenitors• CD56+ Natural Killer Cells