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Induction of Acute Ischemic Stroke in Mice Using the Distal Middle Artery Occlusion Technique
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ALDH2 protects against stroke by clearing 4-HNE
Jin-Min Guo1, Ai-Jun Liu, Pu Zang
1Department of Pharmacology, School of Pharmacy, Second Military Medical University, 325 Guo He Road, Shanghai 200433, China.
Cell Research
|May 22, 2013
Summary
Aldehyde dehydrogenase 2 (ALDH2) deficiency is linked to neuronal injury and stroke risk. Activating the ALDH2 pathway may help identify stroke-prone individuals and offer therapeutic targets.
Area of Science:
- Biochemistry
- Neuroscience
- Cardiovascular Research
Background:
- Aldehyde dehydrogenase 2 (ALDH2) is a key mitochondrial enzyme metabolizing ethanol and toxic aldehydes like 4-hydroxy-2-nonenal (4-HNE).
- ALDH2 plays a crucial role in cellular detoxification and protection against oxidative stress.
Purpose of the Study:
- To investigate the role of ALDH2 deficiency in stroke pathogenesis.
- To explore the potential of the ALDH2 pathway as a therapeutic target for stroke prevention and treatment.
Main Methods:
- Proteomic analysis in stroke-prone spontaneously hypertensive rats (SHR-SP) and spontaneously hypertensive rats (SHR).
- In vitro studies involving ALDH2 overexpression and knockdown in neuronal cells.
- Assessment of 4-HNE levels in serum and plasma of rats and human stroke patients.
- Evaluation of ethanol's neuroprotective effects via the PKCε-ALDH2 pathway.
Main Results:
- ALDH2 deficiency was identified in SHR-SP rats compared to SHR rats.
- ALDH2 overexpression/activation conferred neuroprotection by clearing 4-HNE in vitro.
- ALDH2-knockdown rats showed impaired neuroprotection from PKCε.
- Ethanol administration enhanced 4-HNE detoxification and protected against ischemic injury through the PKCε-ALDH2 pathway.
- Elevated serum 4-HNE levels in SHR-SP correlated inversely with lifespan.
- Elevated plasma 4-HNE levels were observed in human stroke patients post-stroke and predicted stroke risk.
Conclusions:
- ALDH2 deficiency contributes to neuronal injury and stroke.
- The ALDH2 pathway is implicated in the neuroprotective effects of ethanol against ischemic stroke.
- ALDH2 pathway activation may serve as a biomarker for identifying stroke-prone individuals.
- Targeting the ALDH2 pathway presents a potential therapeutic strategy for stroke.
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