Sleep disruption damages gut's self-repair ability via stress signals from brain (Feb 2026) Sleep disturbance triggers aberrant activation of vagus circuitry and induces intestinal stem cell dysfunction Other

[Michael Harrop]

https://news.uci.edu/2026/02/05/sleep-disruption-damages-guts-self-repair-ability-via-stress-signals-from-brain/
https://www.cell.com/cell-stem-cell/fulltext/S1934-5909(26)00025-1

Highlights​

• Sleep deprivation triggers intestinal stem cell dysfunction and gut pathologies
• Overactive dorsal motor nucleus of vagus transmits sleep defect signals to the gut
• Excess acetylcholine from vagus nerve triggers 5-hydroxytryptamine spike in the gut
• Elevated 5-hydroxytryptamine induces oxidative stress in intestinal stem cells

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Summary​

Sleep disturbances are associated with pathogenesis of numerous chronic disorders, including chronic gastrointestinal diseases. However, the mechanism that transmits sleep disturbance-induced aberrant neural signaling from the brain to the gut remains elusive.

We show that acute sleep deprivation (SD) impairs intestinal stem cell (ISC) function, leading to shortening of crypt-villus architecture and Paneth cell loss. We identified the dorsal motor nucleus of vagus (DMV) as the SD-sensitive central nervous system center that transmits sleep effects to the gut. SD aberrantly activates DMV neurons, driving excessive acetylcholine release from the vagus nerve into the gut. Acetylcholine triggers 5-hydroxytryptamine (5-HT) release by enterochromaffin cells and suppresses its reuptake via muscarinic receptors, thereby causing a spike in 5-HT levels. Elevated 5-HT induces excessive oxidative stress in ISCs through its receptor HTR4, promoting gut pathologies.

Overall, we reveal an SD-responsive neural circuit that controls ISCs and identify therapeutic strategies for mitigating SD-related gut diseases.

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[SFBayFMT5]

It's interesting here that increased serotonin is part of the pathology. This possibly has some relevance to people whose gut gets worse on SSRIs.

My descent into the worst gut problems I've ever had started after being on 5-HTP for a little over 2 years. It was much worse even than where I was immediately after going off over 5 years of continuous antibiotics in terms of food sensitivities and pain, even though I didn't have the stool irregularity that I did going off antibiotics.