Neurochemical Research

, Volume 43, Issue 7, pp 1339–1347 | Cite as

ALDH2 Protects Against Ischemic Stroke in Rats by Facilitating 4-HNE Clearance and AQP4 Down-Regulation

  • Yan Li
  • Si-liang Liu
  • Si-hua QiEmail author
Original Paper


Aldehyde dehydrogenase 2 (ALDH2) is a new therapeutic target in the central nervous system. However, the association between ALDH2 and brain edema following ischemic stroke (IS) remains unclear. The present study was investigated to whether active ALDH2 can attenuate brain edema by using a rat model of IS, with the aim of clarifying the underlying mechanisms involved. Rats were administered the ALDH2 agonist Alda-1, vehicle or the ALDH2 inhibitor cyanamide (CYA) 15 min prior to a 1.5 h middle cerebral artery occlusion (MCAO) surgery. The effects of ALDH2 were subsequently investigated 24 h after reperfusion by evaluating neurological function, infarct sizes, brain edema volumes, 4-hydroxy-2-nonenal (4-HNE) levels, and aquaporin 4 (AQP4) protein expression. The results demonstrated that increasing ALDH2 activity significantly improved neurological deficits, reduced infarct sizes, and attenuated brain edema after MCAO. Alda-1 administration led to decreased 4-HNE levels and inhibited AQP4 protein expression in the peri-infarct section of the brain. Whereas, CYA administration increased 4-HNE levels, AQP4 expression, and simultaneously aggravated brain edema following MCAO. In conclusion, increasing ALDH2 activity can improve brain edema, infarct volumes, and reduce neurological impairment in a rat IS model. The therapeutic benefits of ALDH2 are related to 4-HNE clearance and AQP4 down-regulation.


ALDH2 Middle cerebral artery occlusion Brain edema Aquaporin 4 4-HNE 



The project is supported by the National Natural Science Foundation of China (No. 81271456).

Compliance with Ethical Standards

Conflict of interest

No competing interests exist.


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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.The Department of Anesthesiology, The Fourth Affiliated HospitalHarbin Medical UniversityHarbinChina

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