Increased glymphatic influx is correlated with high EEG delta power and low heart rate in mice under anesthesia.

Abstract:

:The glymphatic system is responsible for brain-wide delivery of nutrients and clearance of waste via influx of cerebrospinal fluid (CSF) alongside perivascular spaces and through the brain. Glymphatic system activity increases during sleep or ketamine/xylazine (K/X) anesthesia, yet the mechanism(s) facilitating CSF influx are poorly understood. Here, we correlated influx of a CSF tracer into the brain with electroencephalogram (EEG) power, heart rate, blood pressure, and respiratory rate in wild-type mice under six different anesthesia regimens. We found that glymphatic CSF tracer influx was highest under K/X followed by isoflurane (ISO) supplemented with dexmedetomidine and pentobarbital. Mice anesthetized with α-chloralose, Avertin, or ISO exhibited low CSF tracer influx. This is the first study to show that glymphatic influx correlates positively with cortical delta power in EEG recordings and negatively with beta power and heart rate.

journal_name

Sci Adv

journal_title

Science advances

authors

Hablitz LM,Vinitsky HS,Sun Q,Stæger FF,Sigurdsson B,Mortensen KN,Lilius TO,Nedergaard M

doi

10.1126/sciadv.aav5447

subject

Has Abstract

pub_date

2019-02-27 00:00:00

pages

eaav5447

issue

2

issn

2375-2548

pii

aav5447

journal_volume

5

pub_type

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