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Experimental Models to Study the Neuroprotection of Acidic Postconditioning Against Cerebral Ischemia
Published on: July 31, 2017
Remote post-conditioning reduces hypoxic damage early after experimental stroke.
Henrik Hasseldam1, Jacob Hansen-Schwartz, Nina Munkholm
1University of Copenhagen, Denmark. henrik.hasseldam@bric.ku.dk
Neurological Research
|April 2, 2013
Summary
Pimonidazole effectively quantifies early ischemic brain damage after stroke. Remote post-conditioning significantly reduces this hypoxic damage, offering a promising therapeutic avenue.
Area of Science:
- Neuroscience
- Biomedical Engineering
- Pathology
Background:
- Reliable early markers for ischemic brain damage are currently lacking.
- Hypoxic insults following stroke require accurate quantification for timely intervention.
Purpose of the Study:
- To evaluate pimonidazole as a reliable tool for quantifying early hypoxic insults in experimental stroke.
- To assess the efficacy of remote post-conditioning in mitigating ischemic damage.
Main Methods:
- Utilized a rat model of reversible middle cerebral artery occlusion (MCAO).
- Employed semi-quantitative Western blotting for pimonidazole adduct detection.
- Administered remote post-conditioning via intermittent hind limb ischemia.
Main Results:
- Established a linear relationship between pimonidazole binding and ischemia duration (5-60 minutes).
- Demonstrated significant reduction in pimonidazole binding with remote post-conditioning.
- Observed increased phosphorylated protein kinase C-alpha and p38 phosphorylation at 24 hours post-reflow.
Conclusions:
- Pimonidazole is a viable marker for quantifying ischemic impact in stroke, even with short survival times.
- Early remote post-conditioning effectively reduces ischemic damage.
- Potential mechanisms include hyperpolarization and reduced vasospasm in cerebral arteries.
