Gut bacterium eased memory problems in obese middle-aged mice
In male mice fed a high-fat diet from 6 to 12 months of age, oral bacterial supplementation reduced weight gain and memory impairments.
Our read
Interventions- Studied:
- Experiments in obese middle-aged male mice, 6 consecutive months, against high-fat-diet controls
- What changed:
- Spatial memory improved: Akk-treated mice spent 39.7% more time in the maze’s target area than high-fat-diet controls
- The catch:
- Serum metabolites were not measured in the high-fat-diet or Akk supplementation groups
- In the record:
- One of 45 papers on akkermansia muciniphila on record: 6 with results in people, 26 in animals. Its result on inflammation agrees with all 4 other findings on record.
- Why it’s aging research:
- Biological age, frailty, function, multimorbidity or death.
Editor of record: Boris Djordjevic · AgingResearch.News
An experiment in male mice of the C57BL/6J strain tested the effects of a high-fat diet during midlife, from 6 to 12 months of age. The researchers also tested oral supplements of Akkermansia muciniphila, a gut bacterium. The diet impaired several types of memory and reduced levels of the bacterium in the gut. Supplementation reduced diet-induced weight gain and eased problems with memory for places, recognition and context.
In the hippocampus, a brain region involved in memory, supplementation reduced excessive activation of glial cells, which support nerve cells. It also reduced increases in inflammation-promoting substances, reduced nerve-cell loss and preserved the integrity of connections between nerve cells.
Why it matters
Midlife obesity is a risk factor for age-related cognitive decline. The work points to gut microbes as a possible early intervention target for that decline.
Caveats
This experiment in male mice does not establish benefits in people. The abstract did not report sample sizes, supplement dose or supplementation duration.
From the paper
- Animals
A total of 99 mice were included in the study and were assigned to three experimental cohorts.
- Limitation
First, our serum metabolomics analysis was only performed in young and middle-aged mice on a normal chow diet, without including the HFD and Akk supplementation groups.
Quoted word for word from the full text on mdpi.com.
- Akkermansia muciniphila
- Inflammation
- Lipid and ceramide metabolism
- Cognitive impairment
- Glial activation
- Mice
The paper
Capital Medical University
International Journal of Molecular Sciences, Sep 30, 2026, Open access
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