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Tuft Cells in the Gut Limit Cognitive Disorders by Regulating Gut Homeostasis
Lu Chen1, Yuxuan Yang1, Yong Zhang2
1Department of Pathogen Biology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China.
Cellular and Molecular Gastroenterology and Hepatology
|February 1, 2026
Summary
Tuft cells in the gut are crucial for maintaining gut barrier function and immune balance, impacting cognitive health. Their absence leads to cognitive decline, which can be reversed by restoring tuft cell activity.
Area of Science:
- Gastroenterology
- Neuroscience
- Immunology
Background:
- Tuft cells are specialized gut epithelial cells involved in type 2 immunity and gut barrier maintenance.
- The specific role of tuft cells in cognitive impairments has not been previously established.
Purpose of the Study:
- To investigate the role of gut tuft cells in cognitive function and associated gut homeostasis.
- To explore the mechanisms linking tuft cells, gut microbiota, and neuroinflammation in cognitive disorders.
Main Methods:
- Comparison of behavioral performance, gut microbiota, gut permeability, and immune cell populations in tuft cell-absent mice versus wild-type littermates.
- Utilized co-housing, fecal microbiota transplantation, single-cell RNA sequencing, and colonic organoid models to elucidate mechanisms.
- Administered succinic acid and generated tuft cell-deficient Alzheimer's disease (AD) model mice to assess therapeutic potential.
Main Results:
- Tuft cell deficiency in mice led to increased gut permeability, immune imbalance, neuroinflammation, and cognitive dysfunction, mediated by gut microbiota alterations.
- Alzheimer's disease model mice exhibited reduced tuft cell numbers and impaired type 2 immunity, potentially due to beta-amyloid's effect on tuft cell differentiation.
- Succinic acid administration reversed cognitive deficits and restored gut homeostasis in AD model mice.
Conclusions:
- Gut tuft cells are essential for maintaining gut homeostasis and may play a critical role in preventing cognitive disorders.
- Targeting tuft cell function presents a potential therapeutic strategy for cognitive impairments associated with gut dysbiosis and neuroinflammation.
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