睡眠紊乱通过异常激活迷走神经环路诱导肠道干细胞功能障碍

Abstract

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.