The hypnotic effect of propofol involves inhibition of GABAergic neurons in the lateral hypothalamus.

Abstract:

:Propofol is widely used for induction and maintenance of anaesthesia, which causes a rapid loss of consciousness. So far the mechanisms underlying the effect of propofol are still largely unknown. Here, we found that microinjection of propofol in the lateral hypothalamus caused a significant decrease in wakefulness and an increase in the amount of non-rapid eye movement sleep and rapid eye movement sleep. Application of propofol in the lateral hypothalamus affected the electroencephalogram power spectra with a decrease in theta oscillations and an increase in the delta oscillations. Additionally, using whole-cell patch clamp recording, we found propofol inhibited the excitability of the GABAergic neurons in the lateral hypothalamus, which plays a critical role in controlling wakefulness. Altogether, these findings indicate that propofol targets lateral hypothalamus and generates a hypnotic state, which might involve the inhibition of GABAergic neurons. These results provide a novel mechanism to explain propofol-elicited anaesthesia.

journal_name

Neuroreport

journal_title

Neuroreport

authors

Shi Y,Xiao D,Dai L,Si Y,Fang Q,Wei X

doi

10.1097/WNR.0000000000001292

subject

Has Abstract

pub_date

2019-10-09 00:00:00

pages

927-932

issue

14

eissn

0959-4965

issn

1473-558X

pii

00001756-201910010-00004

journal_volume

30

pub_type

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