- [Resource Hub](/) - [Blog](/?resource-type=blog-post#library) - Unlocking FFPE Archives - Part 2: The Chemistry Problem: Why Preservation Became a Prison # FFPE Tissue Dissociation - Part 2: The Chemistry Problem: Why Preservation Became a Prison FFPE Tissue Dissociation Series - Part 2 of 5 (Prefer to listen to the full story? Click play to hear Episode 2 of our accompanying audio version.) The Precision Point - The Chemistry Problem - Episode 2 0:00 / 0:00 Your browser does not support the audio element. Here's a weird fact: the same chemical that saves your sample also traps everything useful inside it. Think about laminating a document. Great for protection. Terrible if you need to edit what's inside. That's formalin. And for decades, nobody could undo the damage. Sound familiar? ## What Formalin Actually Does Formalin works like superglue for proteins. It creates bridges between molecules that hold everything in place. Great for preserving structure. Terrible for getting anything back out. The tissue looks perfect under a microscope. The cells are intact. The architecture is preserved. But the molecular data? Locked behind chemical bars. ## Time Makes It Worse Here's the other problem: preservation isn't permanent. The genetic material inside slowly falls apart. Old samples have shorter, more damaged pieces. A sample from last year? Challenging. A sample from ten years ago? Much harder. Twenty years? The data is fragmenting more each day. What's the deadline before it's too late? ## The Good News The chemistry that creates these problems is understood. Scientists know what formalin does and why. That knowledge opens doors. New approaches are emerging. Methods designed specifically for archived samples. Workflows that work with the chemistry instead of against it. Blog Series [Unlocking FFPE Archives](/resources/series/unlocking-ffpe-archives-series/) Part 2 of 5 [Previous Unlocking FFPE Archives - Part 1: The FFPE Fortune - What's Hidden in Your Biobank?](/resources/unlocking-ffpe-archives-part-1-the-ffpe-fortune/) [Next Unlocking FFPE Archives - Part 3: Manual Methods vs. Modern Science: The Great Workflow Debate](/resources/unlocking-ffpe-archives-part-3-manual-vs-modern-workflow-debate/) [View all posts in this series](/resources/series/unlocking-ffpe-archives-series/) [Back to all resources](/#library) ## Similar resources [Field Guide](/resources/brain-tissue-complexity-myelin-lipids-neuronal-nuclei/) Singulator 200+ 2026 ### Overcoming Brain Tissue Complexity: Myelin, Lipids, and Fragile Neuronal Nuclei Brain FFPE tissue creates unique nuclei isolation challenges. Myelin debris, lipid contamination, and fragile neuronal nuclei require controlled automated processing to preserve cell-type diversity for single-nucleus sequencing. [Read Field Guide](/resources/brain-tissue-complexity-myelin-lipids-neuronal-nuclei/) [Field Guide](/resources/brain-tumor-ffpe-surgical-resection-single-cell/) Singulator 200+ 2026 ### Brain Tumor FFPE Processing: From Surgical Resection to Single-Nucleus Insights Process brain tumor FFPE from surgical resections on the Singulator 200+. Preserve cancer cells and immune populations for snRNA-seq and spatial analysis. [Read Field Guide](/resources/brain-tumor-ffpe-surgical-resection-single-cell/) [Ebook](/resources/cold-case-files-neuroscience-ffpe/) Singulator 200+ 2026 ### Cold Case Files:The Brain's Embedded Evidence How the Singulator 200+ preserves fragile neuronal nuclei from irreplaceable postmortem brain tissue. Automated FFPE processing for Alzheimer's, brain tumors, and brain atlases. [Read Ebook](/resources/cold-case-files-neuroscience-ffpe/) [Field Guide](/resources/ffpe-neurodegenerative-disease-research-singulator/) Singulator 200+ 2026 ### FFPE Nuclei Extraction for Neurodegenerative Disease Research Extract nuclei from FFPE brain tissue for Alzheimer's, Parkinson's, and Lewy body research. Longitudinal cohorts, cell-type preservation, and disease staging on the Singulator 200+. [Read Field Guide](/resources/ffpe-neurodegenerative-disease-research-singulator/) [Field Guide](/resources/integrating-snrna-seq-spatial-transcriptomics-brain-ffpe/) Singulator 200+ 2026 ### Integrating snRNA-seq with spatial transcriptomics for brain mapping Pair spatial transcriptomics with snRNA-seq from the same FFPE brain block. Block allocation, platform selection, and nuclei quality for multi-omic brain studies. [Read Field Guide](/resources/integrating-snrna-seq-spatial-transcriptomics-brain-ffpe/) [Field Guide](/resources/maximizing-limited-brain-tissue-sections-ffpe/) Singulator 200+ 2026 ### Maximizing Results from Limited Brain Tissue Sections Get high-quality nuclei from limited postmortem brain FFPE sections. Process NIH biobank allocations, hospital archives, and surgical specimens on the Singulator 200+. [Read Field Guide](/resources/maximizing-limited-brain-tissue-sections-ffpe/) [Field Guide](/resources/navigating-postmortem-brain-tissue-ffpe-genomics/) Singulator 200+ 2026 ### Navigating postmortem brain tissue for FFPE genomics Practical guide to postmortem brain FFPE challenges: necropsy timing, fixation variability, biobank sourcing, myelin debris, and how the Singulator 200+ standardizes nuclei extraction. [Read Field Guide](/resources/navigating-postmortem-brain-tissue-ffpe-genomics/) [Field Guide](/resources/reproducible-multi-site-brain-tissue-atlases-singulator/) Singulator 200+ 2026 ### Building Reproducible Multi-Site Brain Tissue Atlases Standardize brain FFPE nuclei extraction across consortium sites with the Singulator 200+. Eliminate operator variability, prevent batch effects, and scale for atlas projects. [Read Field Guide](/resources/reproducible-multi-site-brain-tissue-atlases-singulator/) [Webinar](/resources/unlocking-single-cell-insights-from-ffpe-samples/) Singulator 200+ 2026 ### Unlocking Single-Cell Insights from FFPE Samples Ronan Chaugnet from Memorial Sloan Kettering shares several years of head-to-head benchmarking data comparing nuclei extraction platforms for FFPE tissue. The Singulator 200+ and Miltenyi GentleMACS both outperformed manual approaches across glioblastoma, liver, lung, pancreas, and tumor samples, with the Singulator 200+ standing out for its fully automated, enzyme-free workflow. Ronan also walks through three methods his lab has built on top of automated FFPE extraction: 10X Genomics FLEX for high-quality gene expression, PERFF-Seq for sorting rare cell populations by RNA markers, and GIFT-Seq for detecting 600+ mutations at single-cell resolution from archival tissue. [Read More](/resources/unlocking-single-cell-insights-from-ffpe-samples/) [Protocol](https://precisioncellsystems.com/wp-content/uploads/2026/03/Automating-Nuclei-Isolation-from-FFPE-Tissues-for-Single-Nuclei-Sequencing-Applications.pdf) Singulator 200+ 2026 ### Automating Nuclei Isolation from FFPE Tissues for Single-Nuclei Sequencing Applications This protocol describes how to isolate, count, and prepare single nuclei from FFPE (formalin-fixed, paraffin-embedded) tissues for single-nuclei sequencing assays using the Singulator 200+ platform. Deparaffinization and rehydration of the tissue using solvent and various concentrations of ethanol are conducted on the Singulator 200+ platform along with automated nuclei isolation. [Read Protocol](https://precisioncellsystems.com/wp-content/uploads/2026/03/Automating-Nuclei-Isolation-from-FFPE-Tissues-for-Single-Nuclei-Sequencing-Applications.pdf) [Blog](/resources/cold-case-closed-brain-atlas/) Singulator 200+ 2026 ### Cold Case - Part 5: Case Closed Brain atlases are being built. Archival tissue is finally talking. How standardized nuclei extraction and platform-agnostic analysis are solving neuroscience's oldest cold cases. [Read Blog](/resources/cold-case-closed-brain-atlas/) [Blog](/resources/cold-case-contaminated-evidence-brain-tissue/) Singulator 200+ 2026 ### Cold Case - Part 2: Contaminated Evidence Manual extraction of nuclei from FFPE brain tissue destroys 50 to 60 percent of starting material. Fragile neurons die first, leaving biased results. Here is what goes wrong. [Read Blog](/resources/cold-case-contaminated-evidence-brain-tissue/)