Chronic sleep deprivation triggers a temporally ordered breakdown of the gut-liver axis, progressing from probiotic depletion to full-scale inflammatory activation over three weeks, researchers at Kunming Medical University report in Frontiers in Microbiology.
Using a platform-based sleep deprivation model in C57BL/6J mice, the team applied multi-omics analysis, combining absolute-quantification gut microbiome sequencing with untargeted hepatic metabolomics, to map the sequence of events leading to liver injury.
What they found
The data revealed a three-stage cascade:
Week 1, Protective loss. Core probiotic bacteria, including Bifidobacterium and Dubosiella, declined alongside protective metabolites such as tryptamine and glycocholic acid. Primary bile acid biosynthesis was perturbed, but liver injury markers (ALT, AST) remained within normal range.
Week 2, Homeostatic decoupling. A compensatory bloom of Ligilactobacillus (a member of Lactobacillaceae) occurred simultaneously with expansion of the opportunistic pathogen Streptococcus. The density of microbiota-metabolite correlations dropped sharply. Serum ALT and AST peaked, signaling active liver injury, while metabolic pathways involving nucleotide sugar and tryptophan metabolism were remodeled.
Week 3, Inflammatory signature. Lactobacillus, Bifidobacterium, and Dubosiella all declined synchronously. Arachidonic acid metabolism and inflammatory immune pathways activated across the board. Elevated serum lipopolysaccharide (LPS) levels suggested intestinal barrier breakdown, allowing bacterial products to reach the liver.
Why it matters
The gut-liver axis is increasingly recognized as a mediator of the health effects of sleep loss, but the temporal sequence of disruption has been poorly understood. This study provides a detailed timeline: probiotics and their metabolites are lost first, followed by a decoupling phase where the microbiota-metabolite network reorganizes, culminating in inflammatory injury.
The authors propose a descriptive model, “protective loss, homeostatic decoupling, inflammatory signature”, that could serve as a framework for future research on sleep, the microbiome, and liver health.
Limits
The findings are correlational. The study did not test causal mechanisms or interventions. As a mouse model, direct translation to humans requires validation. The sample was also small (4 mice per group per time point).
Bottom line
Sleep deprivation does not disrupt the gut-liver axis all at once. It unfolds in a predictable sequence, probiotic depletion first, then metabolic network reorganization, then inflammation. Understanding this timeline could guide timing of interventions to prevent or mitigate liver damage from chronic sleep loss.
Source
Dai M-K, et al. From probiotic depletion to inflammatory cascade: multi-omics reveals the temporal progression of sleep deprivation-induced gut-liver axis disruption in mice. Front Microbiol. 2026 Jun 5;17:1846136. doi:10.3389/fmicb.2026.1846136. PMID: 42326407. PMCID: PMC13279414.