Alzheimer’s mouse models show altered metabolism across organs
An atlas spanning two mouse models studied with and without microbes found altered bile acids, B vitamins and other molecules across tissues.
Our read
AI & data- Studied:
- Experiments in mice from Alzheimer’s disease models
- What changed:
- Alzheimer’s-model mice had altered bile acids, B vitamins and other small molecules across tissues
- Stake:
- An author founded Biota. An author founded Ometa Labs. Authors also declare ties to 6 more companies.
- In the record:
- One of 58 papers on carnitine on record: 8 with results in people, 3 in animals.
Editor of record: Boris Djordjevic · AgingResearch.News
Mice from two genetically engineered models of Alzheimer’s disease, 3xTg and 5xFAD, were studied with and without microbes in an animal experiment. The team mapped small molecules across organs and paired the results with data on microbial genes. They found groups of altered molecules across tissues, including bile acids and B vitamins. In 3xTg mice, metabolic shifts were associated with lower levels of one bacterial species and higher levels of another.
The researchers also identified previously unexplored carnitines, a group of small molecules, linked to microbes’ processing of phenylalanine, an amino acid. Using a new search tool, they traced phenylacetyl-carnitine in 1,470 samples of plasma and serum, the liquid components of human blood. This observational analysis linked the molecule to aging, cognitive impairment and poorer memory performance.
Why it matters
Alzheimer’s disease has unclear origins. The atlas offers a resource for investigating possible links between genes, microbes and metabolism in the disease.
Caveats
The multi-organ findings came from two genetically engineered mouse models, not people with Alzheimer’s disease. The human blood-sample analysis did not test whether changing the molecule affected memory.
The paper
University of California San Diego; California Institute of Technology
Cell Reports, Jun 17, 2026, Open access
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