Mouse and human brain study finds similar deposit makeup
In a mouse and human brain study, deposits from aged brains and brains with a childhood-onset disease had remarkably similar protein and fat compositions.
Limit: The abstract does not separate every finding by species
Edited by Boris Djordjevic · AgingResearch.News
In an observational study of mouse and human brains, researchers examined lipofuscin, material that accumulates with age and in a childhood-onset nerve disease called CLN1. They mapped its buildup across 425 brain regions and analyzed its composition.
Lipofuscin in aged and CLN1 brains had remarkably similar protein and fat compositions. More than 95% of proteins in the deposits could carry attached fat molecules. Many were targets of PPT1, an enzyme that removes these attachments. The enzyme’s activity declined with advancing age. Deficient removal of the attachments was correlated with lipofuscin buildup in healthy aging. The authors also identified a central role for processes involving lysosomes, cells’ waste-processing compartments, and mitochondria, their energy-producing structures, in deposit formation.
Why it matters
Lipofuscin accumulates as brains age, but its origins have remained unclear. The authors offer these findings as a resource for studying aging and diseases involving nerve-cell degeneration.
Caveats
These observational associations do not show that deficient removal of fat attachments caused the deposits. The abstract does not report sample sizes or separate every finding by species.
- Resources: datasets, atlases and tools
- Cellular homeostasis
- Lipid and ceramide metabolism
- Lipofuscin
- PPT1
- Humans
The paper
Yale University
Acta Neuropathologica, May 3, 2026, Open access, accepted manuscript
