Ultrastructural Preservation of a Whole Large Mammal Brain (bioRxiv, 2026) ⚠️ Preprint – not yet peer-reviewed.
A 2026 preprint builds on over a decade of brain preservation research, demonstrating that whole mammalian brains (pigs) can be preserved with remarkable structural fidelity under near–real-world, end-of-life conditions.
The study refines aldehyde-stabilized cryopreservation (ASC)—a technique previously recognized by the Brain Preservation Foundation. This method combines chemical fixation (aldehydes), cryoprotectants, and controlled cooling to prevent ice damage and preserve neural structure at the nanoscale. — What the study shows.
Whole pig brains preserved with intact cellular and synaptic architecture.
Preservation remains viable even with delayed postmortem intervals (~10 minutes)
Tissue remains perfusable and structurally stable after fixation.
Protocol moves toward clinically realistic implementation, not just lab conditions.







