Sleep Deprivation Linked to Gut Stem Cell Damage

New study reveals how lack of sleep triggers a signaling cascade that harms intestinal stem cells.

Published on Feb. 19, 2026

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A new study in mice has found that sleep deprivation can disrupt the function of gut stem cells in ways that may increase the risk of inflammatory bowel diseases like ulcerative colitis and Crohn's disease. The research revealed that sleep deprivation triggers a signaling cascade from the brain to the gut via the vagus nerve, leading to an excessive release of serotonin that damages intestinal stem cells and reduces their regenerative capacity.

Why it matters

This study highlights the important connection between sleep and overall health, showing that sleep disturbances can have significant impacts on organs beyond just the brain. The findings suggest that chronic sleep problems may contribute to the development of inflammatory bowel diseases and other gut-related disorders, in addition to the well-known effects on mental health and daily function.

The details

The researchers deprived mice of sleep for two days and observed that their intestines showed signs of oxidative stress, with nearly half the number of stem cells compared to well-rested mice. Further analysis revealed that sleep deprivation led to an increase in serotonin levels in the gut, which can contribute to issues like diarrhea, IBD, and tumor development. The team found that this serotonin surge was triggered by aberrant signals transmitted through the vagus nerve, the main communication pathway between the brain and the gut. Blocking the vagus nerve or inhibiting acetylcholine, the key signaling molecule, protected the gut from the damaging effects of sleep deprivation.

  • The study was published on February 5, 2026 in the journal Cell Stem Cell.
  • The researchers deprived mice of sleep for two days to observe the effects on their intestines.

The players

Dragana Rogulja

A neuroscientist at Harvard Medical School who was not involved in the study.

Zhengquan Yu

A molecular biologist at China Agricultural University and a co-author of the study.

Maksim Plikus

A cell biologist at the University of California, Irvine and a co-author of the study.

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What they’re saying

“We now have evidence showing that sleep is not just [important] for the brain but for overall health.”

— Dragana Rogulja, Neuroscientist (Live Science)

“This really showed how quickly and severely sleep disruption damages the gut.”

— Zhengquan Yu, Molecular Biologist (Live Science)

“Every component in this cascade is really important as a target for potential therapy.”

— Maksim Plikus, Cell Biologist (Live Science)

What’s next

The research team plans to study the relevance of this pathway in the context of chronic sleep disorders to determine if long-term activation of the vagus nerve could contribute to the development of cancer or inflammatory bowel diseases. They also aim to develop therapies targeting the vagus nerve or the molecular pathways involved, to treat gut dysfunction in patients with insomnia.

The takeaway

This study underscores the critical importance of sleep for overall health, revealing that sleep deprivation can have far-reaching impacts on the gut and potentially contribute to the development of inflammatory bowel diseases. The findings highlight the need for greater awareness and treatment of sleep disorders to maintain a healthy digestive system.