Myricetin ameliorated ischemia/reperfusion-induced brain endothelial permeability by improvement of eNOS uncoupling and activation eNOS/NO.

Abstract:

:Disruption of the blood-brain barrier (BBB) has been considered as a major pathological change in stroke. eNOS/NO play a key role in maintain BBB function. Myricetin is one of the common flavones widely exists in food and fruit, show certain protective effect on the brain function. This experiment establishes oxygeneglucose deprivation and reoxygenation (OGD/R) brain cell model. The regulated effects of Myricetin on BBB function, eNOS/NO and eNOS uncoupling were evaluated. To investigate the molecular mechanism, Akt and Nrf2 inhibitor were also used. The result showed that Myricetin could significantly decreased the enhancement of endothelial permeability and inflammation in OGD/R model, in addition regulated eNOS/NO pathway. The regulate effect in endothelial permeability and eNOS activity by Myricetin were both decreased when combined with Akt inhibitor or Nrf2 inhibitor, and was abrogated when combined with Akt and Nrf2 inhibitor simultaneously. The regulated effect on eNOS uncoupling by Myricetin were abrogated when combined with Nrf2 inhibitor, but not with Akt inhibitor. In conclusion, Myricetin showed significant protect effect on ischemia/reperfusion-induced brain endothelial permeability, and related to simultaneously regulated Akt pathway and improvement of eNOS uncoupling through Nrf2 pathway.

journal_name

J Pharmacol Sci

authors

Zhang S,Hu X,Guo S,Shi L,He Q,Zhang P,Yu S,Zhao R

doi

10.1016/j.jphs.2019.04.009

subject

Has Abstract

pub_date

2019-05-01 00:00:00

pages

62-72

issue

1

eissn

1347-8613

issn

1347-8648

pii

S1347-8613(19)31054-0

journal_volume

140

pub_type

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