TAP reading note: Brain clearance is reduced during sleep and anesthesia
This mouse study found similar diffusion coefficients across the tested states but estimated reduced tracer clearance during recovery sleep and the anaesthetic conditions studied. It highlights the need to distinguish diffusion, distribution and clearance and to compare the actual experimental methods.
Updated 2026-10-29 · Archived
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What the study found
This mouse study found similar diffusion coefficients across the tested states but estimated reduced tracer clearance during recovery sleep and the anaesthetic conditions studied. It highlights the need to distinguish diffusion, distribution and clearance and to compare the actual experimental methods.
Scope & limitations
Male C57/BL6 mice aged 3–7 months, with different subsamples for diffusion and clearance measurements.
Sleep followed five hours of deprivation. Most procedures were unblinded, no advance sample-size calculation was performed, and exclusions included failed fits. Methods differ from Xie's 2013 study. A formal 2024 correction fixed the Figure 3b source-data column Mean Wake 3h. This note does not independently reproduce Figure 3b; data reuse requires the publisher's current corrected file.
Population & sample
Male C57/BL6 mice aged 3–7 months, with different subsamples for diffusion and clearance measurements.
Exposure or intervention
FITC-dextran photobleaching for diffusion and intraparenchymal AF488 injection with fluorescence/model-based clearance; within-mouse wake/sleep order was randomized.
Outcomes
Diffusion coefficients and model-estimated tracer clearance, dependent on distribution and distance assumptions.
Time frame
Acute wake, post-deprivation recovery sleep and anaesthesia observations.
Research funding
Wellcome 220759/Z/20/Z; UK Dementia Research Institute UK DRI-5004; EPSRC and MRC studentships; imaging-facility support from Wellcome 104931/Z/14/Z and BBSRC BB/L105129/1.
Research conflicts of interest
The authors declare no competing interests.
Reading scope
Full-text main results, animal/clearance/statistical/exclusion methods, captions and formal correction. Comparison of the local source data with the publisher's current corrected version remains incomplete.
References
Publication record
TAP-RDN-0063 · v1.0 · English
Author: TAP Editorial Team ·
The Allostasis Project is founded and supported by Resilio.
Record for v1.0 · Updated
Editorial responsibility: TAP Editorial Team
Scientific review
Not yet scientifically reviewed
Editorial note
Under the editorial responsibility of the TAP Editorial Team, this publication used AI assistance for content organization and editing. Scientific review is recorded separately on this page.
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Record integrity & available editions
SHA-256: ec95a54840a323f875bc67955e7934f3f30051db0a2f6aacc542602d5318d48d
Captured: 2026-10-29T10:31:13.634Z
- v1.0 · 2026-10-29