On this page

Study design

Researchers analyzed small brain biopsies obtained during ventriculoperitoneal shunt surgery from 18 people with suspected normal-pressure hydrocephalus, alongside cerebrospinal fluid and postmortem control tissue. Mass-spectrometry imaging and stable-isotope labeling were used to examine plaque chemistry and protein turnover.

What the study found

Amyloid plaques were present in 9 of 18 biopsies, while mature tau tangles were rare. Phosphorylated tau 217 was enriched near plaques. Labeling detected newly made tau within about three hours and yielded an estimated brain tau half-life of roughly 34 days; plaques showed little detectable turnover.

Limits and interpretation

These samples came from a small, selected group undergoing neurosurgery, not a representative population. Tissue observations do not establish symptoms, future dementia risk, or treatment effects. The findings provide a research method for studying living human tissue and require replication.

This sourced news summary and translation were prepared with AI assistance. Source links, the news date and research limitations are disclosed; this is not a claim of independent medical expert review. News production method.

Sources

Research news is not medical advice or a recommendation to use a substance. Read findings in the context of the study design, participants and limitations. Editorial standards.

← All news