Recurrent sleep restriction in aging female rats: memory, inflammation and blood-brain barrier
In female Wistar rats, repeated sleep restriction from 6 to 18 months of age increased blood-brain barrier permeability in the cerebral cortex and raised hippocampal TNF-α and IL-1β, while accelerating age-related decline in recognition memory. [1]
Automatic summary · not editorially reviewed
The key findings
Female Wistar rats were sleep-restricted for 10 consecutive days every three months from 6 to 18 months of age, with a separate group of 3-month-old rats given a single episode as control. [1]
Recurrent sleep restriction increased blood-brain barrier permeability in the cerebral cortex to tracers of different molecular weights and induced a hippocampal increase in TNF-α and IL-1β. [1]
A single sleep restriction episode was sufficient to impair recognition memory, whereas recurrent sleep restriction accelerated age-related cognitive decline. [1]
The source at a glance
- Study type / format
- Animal study (abstract)
- Population / context
- Female Wistar rats from 6 to 18 months of age, plus a control group of 3-month-old rats.
- Summary based on
- Study abstract
- Original publication
- October 8, 2026
Aging female rats with repeated sleep restriction
The study asked whether recurrent sleep restriction in female rats accelerates aging-related processes, compared with aged females with normal sleep patterns. Female Wistar rats were sleep-restricted for 10 consecutive days every three months from 6 to 18 months of age. A separate group of 3-month-old rats had a single sleep restriction episode as a control. The authors note that reduced sleep duration in women is well recognized and that sleep disorders are linked to a higher incidence of neurodegenerative diseases, but consequences during female aging remain poorly understood.
Supporting source [1]
Higher barrier permeability and hippocampal cytokines
Recurrent sleep restriction increased blood-brain barrier permeability in the cerebral cortex to tracers of different molecular weights. It also induced a hippocampal increase in TNF-α and IL-1β. Senescence markers, by contrast, showed age- and region-dependent changes, with no clear effect of recurrent sleep restriction in aged animals. The authors conclude that blood-brain barrier dysfunction and neuroinflammatory alterations during sleep restriction depend on age, brain region and the recurrence of these episodes.
Supporting source [1]
Recognition memory after single versus repeated episodes
A single sleep restriction episode was sufficient to impair recognition memory. Recurrent sleep restriction accelerated age-related cognitive decline. These are findings in female Wistar rats, not evidence about memory in people. The abstract reports the design, the 6-to-18-month exposure window and the assessed outcomes, but not sample sizes per group or effect sizes. The full text was not reviewed.
Supporting source [1]
How to interpret this
Abstract only; the full text was not reviewed. Findings come from female Wistar rats, so they do not establish effects on memory or brain health in people. Group sizes, effect sizes and statistical details are not reported in the abstract.
Based on the study abstract; the full paper, tables and supplementary data were not reviewed.
Source & supporting passages
Ramírez-López AB, Avilez-Avilez JJ, Gómez-González B, Salas-Venegas V, Ramírez-Carreto RJ, Guzmán-Ruiz MA, Chavarria A, Konigsberg M. · europepmc.org · October 8, 2026