Chronic REM Sleep Deprivation Induces Metabolic and Neurotoxic Alterations Associated with Affective and Cognitive Deficit in Male Wistar Rats: Involvement of HPA Axis, Cholinergic, Inflammatory, and Oxidative Stress Pathways.
Level 5 - mechanism / opinion, no new human data
Animal research without human data
PubMed 42257770 · doi:10.1007/s11064-026-04788-6
What was done
Eighteen male Wistar rats were divided into three groups: control, wide platform control, and chronic sleep deprivation. REM sleep deprivation was carried out for 18 hours per day over five weeks using the modified multi-platform method. The researchers measured glucose and insulin tolerance, corticosterone, and hs-CRP. Behavioral tests evaluated anxiety- and depression-like behaviors, spatial learning, recognition memory, working memory, and long-term memory. Tissue analysis evaluated acetylcholinesterase activity, neurotoxicity markers, oxidative stress parameters, and histopathology across the hippocampus, hypothalamus, and prefrontal cortex.
What was found
The abstract reports directions of effect without numerical values or effect sizes. Chronic REM sleep deprivation caused glucose intolerance, insulin resistance, hyperglycemia, low-grade inflammation, and HPA axis activation. Sleep-deprived rats exhibited anxiety- and depression-like behaviors along with learning and memory impairments. In the brain, deprivation disrupted cholinergic neurotransmission, with acetylcholinesterase activity strongly correlating with memory performance. It also elevated neurotoxicity and oxidative stress markers while reducing antioxidant enzyme activity. Histological examination showed structural atrophy, neuronal degeneration, and decreased neuronal density in the prefrontal cortex, hypothalamus, and hippocampal CA3 and dentate gyrus regions.
Why it matters
The study provides experimental animal evidence mapping multi-system pathways linking chronic REM sleep disruption to metabolic dysregulation, neurodegeneration, and behavioral deficits.
Limits
The experiment used a small sample of 18 male rats, precluding direct translation to humans or assessment of sex-specific differences. The abstract provides no quantitative values, baseline measures, or exact statistical metrics. The modified multi-platform sleep deprivation method introduces non-specific physical and psychological stress confounds.
Cited by
- supports Sleep deprivation in animals causes elevated cortisol, altered glucose and insulin regulation, and increased anxiety and fear-like behavior.