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Automated FFPE nuclei extraction for single-cell genomics
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The FFPE
challenge
Hospitals and biobanks worldwide hold millions of FFPE tissue blocks. Each one contains decades of clinical annotations, treatment histories, and patient outcomes—a depth of retrospective data that fresh tissue collections cannot match.
Single-cell genomics can now interrogate these archives at cellular resolution. The sequencing technology is ready: 10x Chromium Flex uses probe-based chemistry designed for degraded FFPE RNA. The bottleneck is not downstream. It is the step before sequencing—extracting high-quality nuclei from paraffin-embedded tissue.
The archive is waiting. The instruments are ready. The gap is sample preparation.
Decades of data
Pipetting steps required
Current
methods and
limitations
Manual FFPE nuclei extraction follows a grueling sequence: three cycles of toxic solvent deparaffinization under a fume hood, a complete ethanol rehydration series, enzymatic digestion, and multiple centrifugation and filtration steps.
Semi-automated platforms automate the enzymatic digestion portion. But the most variable and hazardous steps—deparaffinization and rehydration—remain entirely manual. The automation starts after the hard part is already done.
The hidden cost
Every manual transfer point introduces variability. When replicate yields from the same tissue block differ by nearly 4-fold, the prep method itself becomes a confound in your data.
The automation
advantage
The Singulator 200+ automates the complete FFPE nuclei extraction workflow from curl to sequencing-ready nuclei. No manual deparaffinization. No ethanol series. No fume hood.
The two-cartridge system separates the chemistry for optimized performance at each step:
Step 1: GREEN FFPE cartridge
Automated deparaffinization and rehydration using a proprietary safe solvent. No xylene, no CitriSolv, no toxic waste stream.
Step 2: YELLOW NIC+ cartridge
Automated nuclei isolation through controlled enzymatic and mechanical processing. Gentle enough to preserve fragile cell types.
Total workflow: approximately 60 minutes. Hands-on time: less than 5 minutes. Any lab member can run it on day one.
Workflow reduction
Consistent yields from precious samples
The Singulator 200+ processes inputs as small as 2 mg of tissue or a single 50-micrometer FFPE curl, recovering more than 1 million nuclei per curl. Replicates from the same tissue block yielded 1.0M nuclei each—identical. The manual comparison? 1.5M and 0.4M from the same block. A 3.75-fold difference.
Cell-type representation that reflects the biology
Manual dissociation preferentially destroys fragile attached cell types. In the PDAC FFPE study, the manual prep was dominated by neutrophils. The Singulator enriched for ductal cancer cells and cancer-associated fibroblasts—the populations that define the tumor microenvironment and drive treatment resistance.
Quality by the numbers
- Erythrocyte contamination: 1% (Singulator) vs. 5% (manual)
- Median genes per cell: 1,209–1,456
- Median UMI per cell: 1,844–2,245
- DV200 scores maintained across preparations
⚠ What manual methods miss
Harsh enzymatic digestion and repeated pipetting preferentially destroy cancer cells, fibroblasts, and endothelial cells.
If your UMAP is dominated by immune cells, the question is not whether immune cells are abundant—it is whether your prep method eliminated everything else.
○ snRNA-seq (10x Chromium Flex)
Probe-based capture designed for degraded FFPE RNA. Publication-quality sequencing metrics confirmed in head-to-head PDAC study with Cell Ranger v8 and Seurat v5.
⬢ Spatial transcriptomics (10x Xenium)
Memorial Sloan Kettering used S200+ FFPE nuclei alongside Xenium spatial data for cell-type annotation of mouse brain melanoma metastasis samples.
◆ PERFF-seq (rare cell sequencing)
Stanford and MSKCC validated the Singulator 200+ for PERFF-seq, a rare cell sequencing approach described as a breakthrough in nuclei profiling from FFPE tissue.
⬣ snATAC-seq (chromatin accessibility)
Intact nuclei from the S200+ workflow are compatible with downstream chromatin accessibility workflows.
Downstream
compatibility
Nuclei from the Singulator 200+ are not just abundant and consistent. They are directly compatible with the platforms researchers already use.
The field is moving toward integrating spatial and single-cell data from the same FFPE block. Spatial transcriptomics shows where cells are; snRNA-seq reveals what they are at single-cell resolution. Used together, they produce a complete molecular atlas of the tissue.
Same block, same day
Section one side of the block for Visium or Xenium. Take a curl from the other side for the Singulator. Sixty minutes later, your snRNA-seq reference atlas is ready to annotate the spatial data.
Where
it is working
Memorial Sloan Kettering Cancer Center
The Dana Pe’er lab at MSKCC used the Singulator 200+ to extract nuclei from FFPE mouse brain tissue with melanoma metastasis. The snRNA-seq data generated from these nuclei revealed discernible immune cell differences that overlapping Xenium spatial signatures could not resolve alone. The Singulator nuclei became the reference atlas that made the spatial data interpretable.
Stanford University & MSKCC: PERFF-seq
Published in Nature Genetics (January 2025), PERFF-seq represents a new approach to profiling rare cells from FFPE tissue. The Stanford and MSKCC teams validated the Singulator 200+ as the nuclei extraction platform for this method, describing automated FFPE nuclei isolation as an “exciting breakthrough in nuclei profiling.”
Head-to-head
Key takeaways
What to know about automated FFPE nuclei extraction for single-cell genomics.
Automation starts at the beginning
The Singulator 200+ automates deparaffinization, rehydration, and nuclei isolation. Semi-automated systems skip the hardest part and start at enzymatic digestion.
Reproducibility is structural
Identical replicate yields (1.0M/1.0M) are a property of the system, not the operator. Manual methods vary by 3.75-fold from the same block.
Cell-type representation matters
Harsh manual processing skews toward immune cells. The Singulator preserves ductal cancer cells, fibroblasts, and the populations that drive tumor heterogeneity.
No toxic solvents, no fume hood
A proprietary safe solvent eliminates xylene and CitriSolv exposure entirely. Any bench becomes an FFPE processing station.
2 mg is enough
Process a single 50-micrometer curl from precious diagnostic blocks and recover more than 1 million sequencing-ready nuclei.
Validated where it counts
Confirmed with 10x Chromium Flex, 10x Xenium, and PERFF-seq at Memorial Sloan Kettering and Stanford University.
Process your
own FFPE on
the Singulator
Bring your most difficult block—the oldest one, the smallest one, the one that gave your manual protocol trouble. Run it through the two-cartridge workflow and see what the Singulator 200+ recovers.
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